Engine Cooling System Chevrolet Corvette C6

Fastener Tightening Specifications

Scheme 1

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Engine Cooling

Begin the system diagnosis with Diagnostic System Check - Vehicle . The Diagnostic System Check - Vehicle will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored DTCs and the codes status

The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The engine cooling fan is a variable speed fan. The engine control module (ECM) controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module. The cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal. The cooling fan speed is affected by many different conditions and can be adjusted from 10-90 percent duty cycle. Ninety percent is considered high fan speed. When multiple cooling speed requests are received, the ECM uses the highest cooling fan speed of all the requests. During normal fan ON operation, the control circuit voltage will be low and near battery voltage when the fan is OFF.

Reference Information

Schematic Reference

Engine Cooling Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Circuit/System Verification

Engine running, command the cooling fan speed from 0-100 percent with a scan tool. The fan speed should transition with the commanded states.

Circuit/System Testing

1. Ignition OFF, disconnect the connector from the cooling fan speed control module.
2. Ignition OFF, install a test lamp between the cooling fan speed control circuit terminal 6 and B+. The lamp should be OFF. If the lamp is ON, test the cooling fan speed control circuit for a short to ground. If the circuit tests normal, replace the ECM.
3. Ignition ON, command the cooling fan speed from 0-100 percent with a scan tool. The brightness of the lamp should change with the commanded states. If the lamp brightness does not change correctly, test the cooling fan speed control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
4. Ignition OFF, measure between the cooling fan speed control module ground circuit terminal 2 at the harness connector and ground for less than 1 ohm. If greater than the specified range, repair the module ground circuit for open/high resistance.
5. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal 3 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
6. Install appropriately fused jumpers between the cooling fan harness connector terminals 1 and 4 power and ground. The cooling fan should activate at full speed. If the cooling fan does not activate, replace the cooling fan.
7. If the ECM, fan, and all circuits test normal, replace the cooling fan speed control module.

Repair Procedures

1. «Cooling Fan and Shroud Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling Fan and Shroud Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. «Cooling Fan Control Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Repair Verification

Ignition ON, command the cooling fan speed from 0-100 percent with a scan tool. The fan speed should transition with the commanded states.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine control module (ECM) uses the engine coolant temperature (ECT) sensor to monitor the engine for an over-termperature condition. This condition occurs when the coolant temperature is above a calibrated value for a calibrated length of time. The ECM will disable half of the cylinders by turning OFF the fuel injectors. By disabling half of cylinders, the ECM is able to reduce the temperature of the coolant.

Conditions for Running the DTC

1. The engine is running.
2. DTC P0117 or P0118 are not set.

Conditions for Setting the DTC

Coolant temperature more than 132°C (270°F) for greater than 10 seconds.

Action Taken When the DTC Sets

1. DTC P1258 is a Type A DTC.
2. The engine will operate in the Overheated Engine Protection Operating Mode.
3. The engine coolant temperature indicator lamp, if equipped, will illuminate.
4. The driver information center (DIC), if equipped, may display a message.

Conditions for Clearing the DTC

DTC P1258 is a Type A DTC.

Description and Operation

1. «Cooling System Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. «Instrument Cluster Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
3. «Indicator/Warning Message Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__indicatorwarning-message-description-and-operation)
4. «Audible Warnings Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__audible-warnings-description-and-operation)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Observe the engine coolant level. The engine coolant level should be within operating range. Refer to Capacities - Approximate Fluid, and Engine Coolant in the Owner's Manual.
2. Ensure that the vehicle has the correct engine coolant, with correct concentration, and is not old, contaminated or contains additives. Refer to Recommended Fluids and Lubricants in the Owner's Manual.
3. Inspect the cooling system for the following: Leaks Kinked or pinched hoses, especially at the radiator Loose, missing, or damaged radiator air seals or deflectors The radiator and A/C condenser for any air flow obstructions or bent fins-Refer to «Symptoms - Engine Cooling»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__symptoms-engine-cooling) .
4. Command the cooling fan speed from 0% to 100% with a scan tool. If the fan speed does not transition with the commanded states, refer to «Cooling Fan Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

1. Test the thermostat for correct operation. Refer to «Thermostat Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__thermostat-diagnosis) .
2. Test the engine cooling system for overheating. Refer to «Engine Overheating»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__engine-overheating) .
3. Inspect the water pump and coolant flow for correct operation. Refer to «Water Pump Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
4. Inspect the engine for worn/leaking/cracked cylinder heads and engine block. Refer to «Coolant in Combustion Chamber»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-1-of-8__coolant-in-combustion-chamber) and «Coolant in Engine Oil»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-1-of-8__coolant-in-engine-oil) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine cooling fan is a variable speed fan. The engine control module (ECM) controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module. The cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal. The cooling fan speed is affected by many different conditions and can be adjusted from 10-90 percent duty cycle. Ninety percent is considered high fan speed. When multiple cooling speed requests are received, the ECM uses the highest cooling fan speed of all the requests. During normal fan ON operation, the control circuit voltage will be low and near battery voltage when the fan is OFF.

Schematic Reference

Engine Cooling Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Engine running, command the cooling fan speed from 0-100 percent with a scan tool. The fan speed should transition with the commanded states.

1. Ignition OFF, disconnect the connector from the cooling fan speed control module.
2. Ignition OFF, install a test lamp between the cooling fan speed control circuit terminal 6 and B+. The lamp should be OFF. If the lamp is ON, test the cooling fan speed control circuit for a short to ground. If the circuit tests normal, replace the ECM.
3. Ignition ON, command the cooling fan speed from 0-100 percent with a scan tool. The brightness of the lamp should change with the commanded states. If the lamp brightness does not change correctly, test the cooling fan speed control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
4. Ignition OFF, measure between the cooling fan speed control module ground circuit terminal 2 at the harness connector and ground for less than 1 ohm of resistance. If greater than the specified range, repair the module ground circuit for open/high resistance.
5. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal 3 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
6. Install appropriately fused jumpers between the cooling fan harness connector terminals 1 and 4 power and ground. The cooling fan should activate at full speed. If the cooling fan does not activate, replace the cooling fan.
7. If the ECM, fan, and all circuits test normal, replace the cooling fan speed control module.

1. «Cooling Fan and Shroud Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling Fan and Shroud Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. «Cooling Fan Control Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, programing and setup

Ignition ON, command the cooling fan speed from 0-100 percent with a scan tool. The fan speed should transition with the commanded states.

Symptoms - Engine Cooling

1. «Cooling System Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. «Cooling Fan Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Cooling System. Refer to «Checking Aftermarket Accessories»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Cooling Fan Always On»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. «Cooling Fan Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
3. «Engine Overheating»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__engine-overheating)
4. «Loss of Coolant (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__loss-of-coolant-ls3-ls7) or «Loss of Coolant (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__loss-of-coolant-ls9)
5. «Thermostat Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__thermostat-diagnosis)
6. «Engine Fails To Reach Normal Operating Temperature»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__engine-fails-to-reach-normal-operating)

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine cooling fan is a variable speed fan. The engine control module (ECM) controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module. The cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal. The cooling fan speed is affected by many different conditions and can be adjusted from 10-90 percent duty cycle (PWM). Ninety percent is considered high fan speed. When multiple cooling speed requests are received the ECM uses the highest cooling fan speed of all the requests. During normal fan ON operation the control circuit voltage will be low and near battery voltage when the fan is OFF.

Schematic Reference

Engine Cooling Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

1. Verify that the following DTC P1482 is not set. If the DTC is set, refer to «DTC P1482»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Ignition ON, verify with a scan tool that the PCM is not commanding fan activation.
3. Ignition ON, observe that the fans are not activated.

1. Ignition OFF, disconnect the cooling fan speed control module.
2. Ignition ON, observe that the fans are not activated. If the fan is not activated, replace the cooling fan speed control module. If the fan is activated, test the fan voltage supply circuit for a short to voltage.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Cooling Fan Control Module Replacement

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine cooling fan is a variable speed fan. The engine control module (ECM) controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module. The cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal. The cooling fan speed is affected by many different conditions and can be adjusted from 10-90 percent duty cycle. Ninety percent is considered high fan speed. When multiple cooling speed requests are received, the ECM uses the highest cooling fan speed of all the requests. During normal fan ON operation, the control circuit voltage will be low and near battery voltage when the fan is OFF.

Schematic Reference

Engine Cooling Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

1. Verify that the following DTC P1482 is not set. If the DTC is set, refer to «DTC P1482»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Ignition ON, command the cooling fan speed from 0-100 percent with a scan tool. The fan speed should transition with the commanded states.

1. Ignition OFF, disconnect the connector from the cooling fan speed control module.
2. Ignition OFF, install a test lamp between the cooling fan speed control circuit terminal 6 and B+. The lamp should be OFF. If the lamp is ON, test the cooling fan speed control circuit for a short to ground. If the circuit tests normal, replace the ECM.
3. Ignition ON, command the cooling fan speed from 0-100 percent with a scan tool. The brightness of the lamp should change with the commanded states. If the lamp brightness does not change correctly, test the cooling fan speed control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
4. Ignition OFF, measure between the cooling fan speed control module ground circuit terminal 2 at the harness connector and ground for less than 1 ohm of resistance. If greater than the specified range, repair the module ground circuit for open/high resistance.
5. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal 3 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
6. Install appropriately fused jumpers between the cooling fan harness connector terminals 1 and 4 power and ground. The cooling fan should activate at full speed. If the cooling fan does not activate, replace the cooling fan.
7. If the ECM, fan, and all circuits test normal, replace the cooling fan speed control module.

1. «Cooling Fan and Shroud Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling Fan and Shroud Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. «Cooling Fan Control Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, programing and setup

Ignition ON, command the cooling fan speed from 0-100 percent with a scan tool. The fan speed should transition with the commanded states.

Engine Overheating

Loss of Coolant (LS3, LS7)

Loss of Coolant (LS9)

Thermostat Diagnosis

Use one of the following procedures in testing for a malfunctioning thermostat.

Tools Required

J 24731 Tempilstick. See Special Tools .

Thermostat Test Procedure Using Tempilsticks

The coolant thermostat can be tested using a temperature (tempil) stick. The temperature stick is a pencil like device. It has a wax material containing certain chemicals which melt at a given temperature. Temperature sticks can be used to determine a thermostat's operating range, by rubbing 87°C (188°F) and 97°C (206°F) sticks on the thermostat housing.

1. Use a tempilstick in order to find the opening and the closing temperatures of the coolant thermostat. J 24731-188 tempilstick melts at 87°C (188°F). The thermostat should begin to open. J 24731-206 tempilstick melts at 97°C (206°F). The thermostat should be fully open.
2. Replace the coolant thermostat if it does not operate properly between this temperature range.

Thermostat Test Procedure Using Glycol

Inspect the operation of the thermostat by suspending the thermostat in heated water.

In order to inspect if the thermostat valve is opening properly, perform the following test

1. Completely submerge the thermostat in heated water. The water should be 11°C (22°F) above the temperature indicated on the thermostat valve.
2. Thoroughly agitate the water. Under these conditions, the thermostat valve should open.
3. Replace the thermostat if it does not open at this temperature.

In order to inspect if the thermostat valve is closing properly, perform the following test

The thermostat should begin to open at 87°C (187°F) and fully open at 100°C (212°F).

1. Completely submerge the thermostat in heated water. The solution should be 6°C (10°F) below the temperature indicated on the thermostat valve.
2. Thoroughly agitate the water. Under these conditions, the thermostat valve should close completely. The thermostat should be fully closed at 80°C (176°F).
3. Replace the thermostat if it does not close at this temperature.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The optional coolant heater operates using 110 volt AC external power and is designed to warm the coolant in the engine block area for improved starting in very cold weather. There is an internal thermal switch in the power cord that prevents operation above -18°C (0°F). The coolant heater helps reduce fuel consumption when a cold engine is warming up. The unit is equipped with a detachable AC power cord. A weather shield on the cord is provided to protect the plug when not in use.

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

1. Test the engine coolant heater for an open or short to ground. If open or shorted, replace the heater.
2. If the heater tests normal, replace the coolant heater power cord.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Coolant Heater Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. «Coolant Heater Cord Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

Engine Fails To Reach Normal Operating Temperature

Special Tools

1. J 24460-01: Cooling System Pressure Tester
2. J 42401: Radiator Cap/Surge Tank Test Adapter

Test Procedure

1. Remove the pressure cap.
2. Wash the pressure cap sealing surface with water.
3. Use the J 24460-01: Cooling System Pressure Tester (1) with J 42401: Radiator Cap/Surge Tank Test Adapter (2) in order to test the pressure cap.
4. Test the pressure cap for the following conditions: Pressure release when the J 24460-01: Cooling System Pressure Tester exceeds the pressure rating of the pressure cap. Maintain the rated pressure for at least 10 seconds. Note the rate of pressure loss.
5. Replace the pressure cap under the following conditions: The pressure cap does not release pressure which exceeds the rated pressure of the cap. The pressure cap does not hold the rated pressure.

1. J 24460-01: Cooling System Pressure Tester
2. J 42401: Radiator Cap and Surge Tank Test Adapter

Cooling System Leak Testing

1. Remove the pressure cap.
2. Test the operation of the pressure cap. Refer to «Pressure Cap Testing»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Wash the pressure cap mating surface with water.
4. Use the J 24460-01: Cooling System Pressure Tester (1) with J 42401: Radiator Cap and Surge Tank Test Adapter (2) in order to apply pressure to the cooling system. Do not exceed the pressure cap rating.
5. The cooling system should hold the rated pressure for at least 2 minutes. Observe the gage for any pressure loss.
6. Repair any leaks as required.

7000081: Tech 2 Kit

1. Connect the 7000081: Tech 2 Kit to the vehicle.
2. Command the charge air cooling pump ON using the 7000081: Tech 2 Kit.
3. Run the pump for at least 2 minutes. Observe the charge air cooling system hoses and components for any sign of coolant leakage.
4. Repair any leaks as required. Refer to the appropriate repair procedure.

J 26568: Coolant and Battery Fluid Tester

Draining Procedure

1. Remove the coolant pressure cap.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Place a drain pan under the drain cock.
4. Remove the radiator drain cock.
5. Drain the cooling system.
6. Lower the vehicle.
7. Inspect the coolant.
8. Follow the appropriate procedure based on the condition of the coolant. Normal in appearance-Follow the filling procedure. Discolored-Follow the flush procedure. Refer to «Flushing (Powertrain)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__flushing-powertrain) «Flushing (Charged Air Cooling)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__flushing-charged-air-cooling) .

Filling Procedure

1. Raise and support the vehicle.
2. Lubricate the drain cock O-ring with clean coolant prior to installation.
3. Install the radiator drain cock and tighten to 2 N.m (18 lb in).
4. Lower the vehicle.
5. Slowly fill the surge tank with a 50/50 coolant mixture until the coolant level reaches the base of the surge tank fill neck. Refer to «Approximate Fluid Capacities»(/chevrolet/corvette/c6-2004-2014/remont/lubrication-system/#maintenance-and-lubrication__approximate-fluid-capacities) .
6. Start the engine and allow to the engine to idle. Allow the engine to idle for approximately 4 minutes.
7. Slowly fill the coolant mixture until the level stabilizes at the base of the surge tank fill neck.
8. Run the engine between 2,000-2,500 RPM for approximately 2 minutes.
9. Allow engine to idle and add approximately 1 liter (1.1 quarts) of coolant to the surge tank.
10. Install the coolant pressure cap.
11. Shut the engine OFF.
12. Allow the engine to cool.
13. Top off the coolant as necessary.
14. Inspect the concentration of the engine coolant using the J 26568: Coolant and Battery Fluid Tester.
15. Rinse away any excess coolant from the engine and the engine compartment.
16. Inspect the cooling system for leaks.

1. J 26568: Coolant and Battery Fluid Tester
2. J 42401: Radiator Cap and Surge Tank Test Adapter
3. GE-47716: Vac N Fill Coolant Refill Tool

1. Remove the coolant pressure cap.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Place a drain pan under the drain cock.
4. Remove the radiator drain cock.
5. Drain the cooling system.
6. Lower the vehicle.
7. Inspect the coolant.
8. Follow the appropriate procedure based on the condition of the coolant. Normal in appearance-Follow the filling procedure. Discolored-Follow the flush procedure. Refer to «Flushing (Powertrain)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__flushing-powertrain) «Flushing (Charged Air Cooling)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__flushing-charged-air-cooling) .

Vac-N-Fill Procedure

1. Install the J 42401: Radiator Cap and Surge Tank Test Adapter onto the coolant surge tank.
2. Attach the Vac N Fill cap to the J 42401: Radiator Cap and Surge Tank Test Adapter.
3. Attach the vacuum gage assembly to the Vac N Fill cap.
4. Attach the fill hose to the barb fitting on the vacuum gage assembly. Ensure that the valve is closed.
5. Pour the coolant mixture into the graduated reservoir.
6. Place the fill hose in the graduated reservoir.
7. Install the vacuum tank on the graduated reservoir with the fill hose routed through the cut-out area in the vacuum tank.
8. Attach the venturi assembly to the vacuum tank.
9. Attach a shop air hose to the venturi assembly. Ensure the valve on the venturi assembly is closed.
10. Attach the vacuum hose to the vacuum gage assembly and the vacuum tank.
11. Open the valve on the venturi assembly. The vacuum gage will begin to rise and a hissing noise will be present.
12. Continue to draw vacuum until the needle stops rising. This should be 610-660 mm Hg (24-26 in Hg). Cooling hoses may start to collapse. This is normal due to vacuum draw.
13. To aid in the fill process, position the graduated reservoir above the coolant fill port.
14. Slowly open the valve on the vacuum gage assembly. When the coolant reaches the top of the fill hose, close the valve. This will eliminate air from the fill hose.
15. Close the valve on the venturi assembly.
16. If there is a suspected leak in the cooling system, allow the system to stabilize under vacuum and monitor for vacuum loss. If vacuum loss is observed, refer to «Loss of Coolant (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__loss-of-coolant-ls3-ls7) or «Loss of Coolant (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system__loss-of-coolant-ls9) .
17. Open the valve on the vacuum gage assembly. The vacuum gage will drop as coolant is drawn into the system.
18. Once the vacuum gage reaches zero, close the valve on the vacuum gage assembly and repeat steps 11-17.
19. Detach the Vac N Fill cap from the J 42401: Radiator Cap and Surge Tank Test Adapter.
20. Remove the J 42401: Radiator Cap and Surge Tank Test Adapter from the coolant surge tank.
21. Add coolant to the system as necessary.
22. Inspect the concentration of the coolant mixture using J 26568: Coolant and Battery Fluid Tester.
23. Detach the vacuum hose from the vacuum gage assembly.
24. Attach the extraction hose to the vacuum hose.
25. Open the valve on the venturi assembly to start a vacuum draw.
26. Use the extraction hose to draw out coolant to the proper level.
27. The vacuum tank has a drain valve on the bottom of the tank. Open the valve to drain coolant from the vacuum tank into a suitable container for disposal.
28. Install the surge tank cap.

Charge Air Cooling System Coolant Level Inspection

1. Remove the charge air coolant cap (1).
2. Verify that coolant is visible near to top of the opening.
3. Using a small funnel, slowly fill the charge air cooling system through the charge air coolant cap port with a 50/50 coolant mixture until the level is slightly below the charge air coolant cap port. Refer to «Approximate Fluid Capacities»(/chevrolet/corvette/c6-2004-2014/remont/lubrication-system/#maintenance-and-lubrication__approximate-fluid-capacities)
4. Install the charge air coolant cap (1).

7000081: Tech 2 Kit

1. Loosen both bleeder valves (1) on the supercharger manifold.
2. Elevate and support the charge air cooler (CAC) inlet hose with the service T-fitting to a point slightly higher than all other CAC cooling components.
3. Remove the service T-fitting cap (1).
4. Raise and suitable support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
5. Remove front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody)
6. Remove the drain bolt (1) at the CAC remote reservoir assembly.
7. Allow the system to fully drain into a clean container.
8. Measure and record the amount of coolant drained.
9. Apply Pipe Sealant w/Teflon® GM Part # 12346004 Canadian Part # 10953480 or equivalent to the drain bolt threads.
10. Install and tighten the drain bolt at CAC remote reservoir assembly to 9.6 N.m (85 lb in).
11. Install front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody)
12. Lower the vehicle.
13. Tighten the bleeder screws (1) at the supercharger manifold to 2.8 N.m (25 lb in).
14. Install and hand tighten the service T-fitting cap (1).
15. Reposition the CAC inlet hose with service T-fitting back to the original position.

1. Install absorbent rags under both bleeder valves (1) to absorb any coolant loss.
2. Loosen both bleeder valves on the supercharger manifold.
3. Elevate and support the CAC inlet hose with the service T-fitting to a point slightly higher than all other CAC cooling components.
4. Remove the service T-fitting cap (1).
5. Slowly fill coolant through the service T-fitting until the coolant becomes present at both bleeder valves, closing one if coolant becomes present before the other.
6. Tighten the bleeder valves to 2.8 N.m (25 lb in).
7. Remove the absorbent rags from below the bleeder valves.
8. Continue to fill the CAC cooling system with coolant until the level rises to the top of the service T-fitting.
9. Install the service T-fitting cap.
10. Using the Tech 2, cycle the CAC pump ON for 60 seconds and then to the OFF position.
11. Remove the service T-fitting cap and wait a minimum of 2 minutes till air purges from the CAC cooling system.
12. Continue to slowly fill the CAC cooling system with coolant until the level rises to the top of the T-fitting.
13. Install the service T-fitting cap.
14. Using the 7000081: Tech 2 Kit, cycle the CAC pump ON for 60 seconds and then back to the OFF position.
15. Repeat steps 9 -12 until additional coolant can not be added through the service T-fitting into the system. Refer to «Approximate Fluid Capacities»(/chevrolet/corvette/c6-2004-2014/remont/lubrication-system/#maintenance-and-lubrication__approximate-fluid-capacities)
16. Inspect the CAC cooling system for leaks.
17. Rinse away any excess coolant from the engine and the engine compartment.

Flushing (Powertrain)

Note. Do not use a chemical flush. Store used coolant in the proper manner, such as in a used engine coolant holding tank. Do not pour used coolant down a drain. Ethylene glycol antifreeze is a very toxic chemical. Do not dispose of coolant into the sewer system or ground water. This is illegal and ecologically unsound. Various methods and equipment can be used to flush the cooling system. If special equipment is used, such as a back flusher, follow the manufacturer's instruction. Always remove the thermostat before flushing the cooling system.

When the cooling system becomes contaminated, the cooling system should be flushed thoroughly to remove the contaminants before the engine is seriously damaged.

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the surge tank. Refer to «Radiator Surge Tank Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Clean and flush the surge tank with clean, drinkable water.
4. Install the surge tank. Refer to «Radiator Surge Tank Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
5. Follow the drain and fill procedure using only clean, drinkable water. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
6. Run the engine for 20 minutes.
7. Stop the engine.
8. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
9. Repeat the procedure if necessary, until the fluid is nearly colorless.
10. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

Flushing (Charged Air Cooling)

Note. Do not use a chemical flush. Store used coolant in the proper manner, such as in a used engine coolant holding tank. Do not pour used coolant down a drain. Ethylene glycol antifreeze is a very toxic chemical. Do not dispose of coolant into the sewer system or ground water. This is illegal and ecologically unsound. Various methods and equipment can be used to flush the cooling system. If special equipment is used, such as a back flusher, follow the manufacturer's instruction. Always remove the thermostat before flushing the cooling system.

When the charge air cooling (CAC) cooling system becomes contaminated, the CAC cooling system should be flushed thoroughly to remove the contaminants before the supercharger is seriously damaged.

1. Drain the CAC cooling system. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. Follow the drain and fill procedure using only clean, drinkable water. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
3. Command the CAC pump to the ON position using the Tech 2. Run the CAC pump for 5 minutes.
4. Drain the CAC cooling system. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
5. Repeat the procedure if necessary, until the fluid is nearly colorless.
6. Fill the CAC cooling system. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

Radiator Cleaning (Charge Air Cooling)

1. Some conditions may require the use of warm water and a mild detergent.
2. Clean the A/C condenser fins.
3. Clean between the A/C condenser and charge air coolant radiator.
4. Clean the charge air coolant radiator cooling fins.
5. Straighten any damaged cooling fins.

Radiator Cleaning (LS2)

1. Some conditions may require the use of warm water and a mild detergent.
2. Clean the A/C condenser fins.
3. Clean between the A/C condenser and radiator.
4. Clean the radiator cooling fins.
5. Straighten any damaged cooling fins.

Radiator Cleaning (LS7)

1. Some conditions may require the use of warm water and a mild detergent.
2. Clean the engine oil cooler (EOC) fins.
3. Clean the A/C condenser fins.
4. Clean the radiator cooling fins.
5. Clean between the EOC and the A/C condenser.
6. Clean between the A/C condenser and radiator.
7. Straighten any damaged cooling fins.

Scheme 2

Scheme 3

Scheme 4

Removal Procedure

1. Using a bent-tip screwdriver or equivalent, pull on one of the open ends of the retaining ring in order to rotate the retaining ring.
2. Rotate the retaining ring around the quick connector until the retaining ring is out of position and can be completely removed.
3. Remove the charge air cooler coolant hose from the quick connector fitting. Pull the lines straight out from the connector.

Installation Procedure

1. Install the retaining ring into each quick connector fitting.
2. Hook one of the open ends of the retaining ring in one of the slots in the quick connector.
3. Rotate the retaining ring around the connector until the retaining ring is positioned with all 3 ears through the 3 slots.
4. Ensure the 3 retaining ring ears can be seen from the inside of the connector and the retaining ring can move freely in the slots.
5. Install the charge air cooler coolant hose into the quick connector fitting. Pull back on the engine oil cooler lines to ensure a proper connection.
6. Inspect and fill the coolant to the proper level.

Scheme 5

1. Drain the charge air cooler coolant system. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. Remove upper intake manifold sight shield. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8)
3. Disconnect the quick connect fitting (1) at the cooler. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
4. Remove the charge air cooler coolant hose (2) from the cooler.
5. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
6. Remove the right front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody)
7. Disconnect the quick connect fitting (1) at the radiator.
8. Remove the charge air cooler coolant hose (2) from the radiator.
9. Remove the charge air cooler coolant hose from the vehicle.

1. Install the charge air cooler coolant hose to the vehicle.
2. Install the charge air cooler coolant hose (2) to the radiator.
3. Connect the quick connect fitting (1) at the radiator.
4. Install the right front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody)
5. Lower the vehicle.
6. Install the charge air cooler coolant hose (2) to the cooler.
7. Connect the quick connect fitting (1) at the cooler. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
8. Install upper intake manifold sight shield. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8)
9. Fill the charge air cooler coolant system. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

J 38185: Hose Clamp Pliers

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Disengage tension and reposition the surge tank inlet hose clamp at the surge tank using the J 38185: Hose Clamp Pliers.
4. Disconnect the surge tank inlet hose from the surge tank.
5. Disengage tension and reposition the surge tank inlet hose clamp at the throttle body assembly using the J 38185: Hose Clamp Pliers.
6. Disconnect the surge tank inlet hose from the air bleed pipe assembly.
7. Disengage tension and reposition the surge tank inlet hose clamp at the radiator using the J 38185: Hose Clamp Pliers.
8. Disconnect the surge tank inlet hose from the radiator.
9. Remove the surge tank inlet hose assembly from the vehicle.

1. Install the surge tank inlet hose assembly to the vehicle.
2. Connect the surge tank inlet hose to the radiator.
3. Disengage tension and reposition the surge tank inlet hose clamp at the radiator using the J 38185: Hose Clamp Pliers.
4. Connect the surge tank inlet hose to the air bleed pipe assembly.
5. Disengage tension and reposition the surge tank inlet hose clamp at the throttle body assembly using the J 38185: Hose Clamp Pliers.
6. Connect the surge tank inlet hose to the surge tank.
7. Disengage tension and reposition the surge tank inlet hose clamp at the surge tank using the J 38185: Hose Clamp Pliers.
8. Install the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
9. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

J 38185: Hose Clamp Pliers

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. Remove the upper intake manifold sight shield. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8)
3. Reposition the surge tank inlet hose clamp (1) at the surge tank using the J 38185: Hose Clamp Pliers
4. Disconnect the surge tank inlet hose (2) from the surge tank.
5. Disconnect the surge tank inlet hose quick connect fittings (1) at the engine.
6. Disconnect the surge tank inlet hose quick connect fitting (1) from the radiator.
7. Remove the surge tank inlet hose assembly (2) from the vehicle.

1. Install the surge tank inlet hose assembly (2) to the vehicle.
2. Install the surge tank inlet hose quick connect fitting (1) to the radiator.
3. Connect the surge tank inlet hose quick connect fittings (1) at the engine.
4. Connect the surge tank inlet hose (2) from the surge tank.
5. Reposition the surge tank inlet hose clamp (1) at the surge tank using the J 38185: Hose Clamp Pliers
6. Install the upper intake manifold sight shield. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8)
7. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

J 38185: Hose Clamp Pliers

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Disengage tension on the surge tank outlet hose clamp (1) at the surge tank using the J 38185: Hose Clamp Pliers.
4. Disconnect the surge tank outlet hose (2) from the surge tank.
5. Disconnect the surge tank outlet hose assembly from the support tabs (1) on the cooling fan shroud.
6. Disengage tension on the surge tank outlet hose clamp (1) at the water pump.
7. Disconnect the surge tank outlet hose (2) from the water pump.
8. Using the J 38185: Hose Clamp Pliers, disengage the tension on the surge tank outlet hose clamp at the heater pipe assembly.
9. Disconnect the surge tank outlet hose from the heater pipe assembly.
10. Remove the surge tank outlet hose assembly from the vehicle.

1. Install the surge tank outlet hose assembly to the vehicle.
2. Connect the surge tank outlet hose to the heater pipe assembly.
3. Using the J 38185: Hose Clamp Pliers, engage tension on the surge tank outlet hose clamp at the heater pipe assembly.
4. Connect the surge tank outlet hose (2) to the water pump.
5. Using the J 38185: Hose Clamp Pliers, engage tension on the surge tank outlet hose clamp (1) at the water pump.
6. Connect the surge tank outlet hose assembly (1) to the support tabs on the cooling fan shroud.
7. Connect the surge tank outlet hose (2) to the surge tank.
8. Engage tension on the surge tank outlet hose clamp (1) at the surge tank using the J 38185: Hose Clamp Pliers.
9. Install the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
10. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

J 38185: Hose Clamp Pliers

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Disengage tension on the surge tank outlet hose clamp (1) at the surge tank using the J 38185: Hose Clamp Pliers.
3. Disconnect the surge tank outlet hose (2) from the surge tank.
4. Disconnect the surge tank outlet hose assembly from the support tabs (1) on the cooling fan shroud.
5. Disengage tension on the surge tank outlet hose clamp (1) at the water pump.
6. Disconnect the surge tank outlet hose (2) from the water pump.
7. Using the J 38185: Hose Clamp Pliers, disengage the tension on the surge tank outlet hose clamp at the heater pipe assembly.
8. Disconnect the surge tank outlet hose from the heater pipe assembly.
9. Remove the surge tank outlet hose assembly from the vehicle.

1. Install the surge tank outlet hose assembly to the vehicle.
2. Connect the surge tank outlet hose to the heater pipe assembly.
3. Using the J 38185: Hose Clamp Pliers, engage tension on the surge tank outlet hose clamp at the heater pipe assembly.
4. Connect the surge tank outlet hose (2) to the water pump.
5. Using the J 38185: Hose Clamp Pliers, engage tension on the surge tank outlet hose clamp (1) at the water pump.
6. Connect the surge tank outlet hose assembly (1) to the support tabs on the cooling fan shroud.
7. Connect the surge tank outlet hose (2) to the surge tank.
8. Engage tension on the surge tank outlet hose clamp (1) at the surge tank using the J 38185: Hose Clamp Pliers.
9. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

J 38185: Hose Clamp Pliers

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Disengage tension on the radiator inlet hose clamp (1) at the radiator using J 38185: Hose Clamp Pliers.
4. Disconnect the radiator inlet hose (2) from the radiator.
5. Disengage tension on the radiator inlet hose clamp (1) at the water pump using J 38185: Hose Clamp Pliers.
6. Disconnect the radiator inlet hose (2) from the water pump.
7. Remove the radiator inlet hose from the vehicle.

1. Install the radiator inlet hose to the vehicle.
2. Connect the radiator inlet hose (2) to the water pump.
3. Engage tension on the radiator inlet hose clamp (1) at the water pump using J 38185: Hose Clamp Pliers.
4. Connect the radiator inlet hose (2) to the radiator.
5. Engage tension on the radiator inlet hose clamp (1) at the radiator using J 38185: Hose Clamp Pliers.
6. Install the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
7. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

J 38185: Hose Clamp Pliers

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Disconnect the radiator inlet hose quick connect fitting (1) at the radiator.
4. Disconnect the radiator inlet hose (2) from the radiator.
5. Disengage tension on the radiator inlet hose clamp (1) at the water pump using J 38185: Hose Clamp Pliers.
6. Disconnect the radiator inlet hose (2) from the water pump.
7. Remove the radiator inlet hose from the vehicle.

1. Install the radiator inlet hose to the vehicle.
2. Connect the radiator inlet hose (2) to the water pump.
3. Engage tension on the radiator inlet hose clamp (1) at the water pump using J 38185: Hose Clamp Pliers.
4. Connect the radiator inlet hose (2) to the radiator.
5. Connect the radiator inlet hose quick connect fitting (1) at the radiator.
6. Install the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
7. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

J 38185: Hose Clamp Pliers

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
2. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
3. Disengage tension on the radiator outlet hose clamp (1) at the radiator using J 38185: Hose Clamp Pliers
4. Disconnect the radiator outlet hose from the radiator (2).
5. Lower the vehicle.
6. Disengage tension on the radiator outlet hose clamp (1) at the engine using the J 38185: Hose Clamp Pliers
7. Disconnect the radiator outlet hose (2) from the engine.
8. Remove the radiator outlet hose.

1. Install the radiator outlet hose.
2. Connect the radiator outlet hose (2) to the engine.
3. Engage tension on the radiator outlet hose clamp (1) at the engine using the J 38185: Hose Clamp Pliers.
4. Raise the vehicle.
5. Connect the radiator outlet hose (2) to the radiator.
6. Engage tension on the radiator outlet hose clamp (1) at the radiator using the J 38185: Hose Clamp Pliers.
7. Lower the vehicle.
8. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

Scheme 6

Scheme 7

DT-47731 Transmission Cooler Quick Disconnect

1. Install the DT-47731 onto the engine oil cooler (EOC) pipe.
2. Slide the DT-47731 toward the EOC pipe fitting.
3. Connect the DT-47731 onto the EOC pipe fitting.
4. Rotate the DT-47731 until the retainer clip (1) rises above the fitting retainer seat.
5. Pull back on the EOC pipe to disengage the pipe from the EOC pipe fitting.
6. Remove the DT-47731 from the EOC pipe.

1. Install the EOC pipe into the EOC pipe fitting. A distinct snap should be heard or felt when assembling the EOC pipe to the fitting.
2. To ensure the cooler line is properly installed, give the cooler pipe a gentle pull.

J 38185: Hose Clamp Pliers

1. Install oil drain pan under the vehicle.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
3. Disengage tension on the engine oil cooler hose clamp (1) at the radiator using J 38185: Hose Clamp Pliers.
4. Remove the engine oil cooler hose (2) from the radiator.
5. Remove the bolt (1) securing the engine oil cooler hose/pipe assembly to the engine block.
6. Disconnect the engine oil cooler hose/pipe from the engine block (2).
7. Disconnect the engine oil cooler hose/pipe from the engine oil cooler core (3).
8. Remove the engine oil cooler hose/pipe from the vehicle (4).

1. Install new engine oil cooler hose/pipe seals.
2. Install the engine oil cooler hose/pipe assembly to the vehicle (4).
3. Connect the engine oil cooler hose/pipe to the engine oil cooler core (3).
4. Connect the engine oil cooler hose/pipe to the engine block (2). CAUTION: Refer to «Fastener Caution»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#dangers-warnings-and-cautions__fastener-caution) 60 N.m (44 lb ft)
5. Install the bolt (1) securing the engine oil cooler hose/pipe assembly to the engine block and tighten to 25 N.m (18 lb ft).
6. Install the engine oil cooler hose (2) to the radiator.
7. Engage tension on the engine oil cooler hose clamp (1) at the radiator using J 38185: Hose Clamp Pliers.
8. Refill the engine with oil and check for leaks.

1. Install oil drain pan under the vehicle.
2. Remove the engine oil cooler hose/pipe from the radiator. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Remove the engine oil cooler hose/pipe clip (3) from the fan shroud.
4. Remove the bolt (2) securing the engine oil cooler hose/pipe assembly to the engine block.
5. Remove the bolts (1) securing the engine oil cooler hose/pipe to the oil filter housing.
6. Remove the engine oil cooler hose/pipe assembly from the vehicle.
7. Remove and discard all engine oil cooler hose/pipe seals.

1. Install new engine oil cooler hose/pipe seals.
2. Install the engine oil cooler hose/pipe assembly to the vehicle.
3. Install the bolts (1) securing the engine oil cooler hose/pipe to the oil filter housing. Tighten: Tighten the bolts to 12 N.m (106 lb in).
4. Install the bolt (2) securing the engine oil cooler hose/pipe assembly to the engine block. Tighten: Tighten the bolt to 25 N.m (18 lb ft).
5. Remove the oil drain pan from under the vehicle.
6. Install the engine oil cooler hose/pipes to the radiator. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
7. Install the engine oil cooler hose/pipe clip (3) to the fan shroud.
8. Refill the engine oil.

1. Install oil drain pan under the vehicle.
2. Remove the left catalytic converter. Refer to «Catalytic Converter Replacement - Left Side (7.0L)»(/chevrolet/corvette/c6-2004-2014/remont/exhaust/#engine-exhaust-system) .
3. Remove the left fender liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
4. Remove the engine oil cooler hose/pipe from the external oil cooler. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
5. Remove the engine oil cooler hose/pipe clip (3) from the fan shroud.
6. Remove the bolt (2) securing the engine oil cooler hose/pipe assembly to the engine block.
7. Remove the bolts (1) securing the engine oil cooler hose/pipe to the oil filter housing.
8. Remove the engine oil cooler hose/pipe assembly from the vehicle.
9. Remove and discard all engine oil cooler hose/pipe seals.

1. Install new engine oil cooler hose/pipe seals.
2. Install the engine oil cooler hose/pipe assembly to the vehicle.
3. Install the bolts (1) securing the engine oil cooler hose/pipe to the oil filter housing. Tighten: Tighten the bolts to 12 N.m (106 lb in).
4. Install the bolt (2) securing the engine oil cooler hose/pipe assembly to the engine block. Tighten: Tighten the bolt to 25 N.m (18 lb ft).
5. Remove the oil drain pan from under the vehicle.
6. Install the engine oil cooler hose/pipes to the external oil cooler. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
7. Install the engine oil cooler hose/pipe clip (3) to the fan shroud.
8. Install the left fender liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
9. Install the left catalytic converter. Refer to «Catalytic Converter Replacement - Left Side (7.0L)»(/chevrolet/corvette/c6-2004-2014/remont/exhaust/#engine-exhaust-system) .
10. Refill the engine with oil and check for leaks.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the left fender liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
3. Remove the left wheelhouse extension. Refer to «Wheelhouse Extension Replacement»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
4. Install oil drain pan under the vehicle.
5. Remove the engine oil cooler hose/pipe from the external oil cooler. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
6. Remove the external engine oil cooler retaining bolts.
7. Remove the external engine oil cooler.
8. Remove and discard all engine oil cooler hose/pipe seals.

1. Install new engine oil cooler hose/pipe seals.
2. Install the external engine oil cooler.
3. Install the external engine oil cooler retaining bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in).
4. Remove the oil drain pan from under the vehicle.
5. Install the engine oil cooler hose/pipes to the external oil cooler. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
6. Install the left wheelhouse extension. Refer to «Wheelhouse Extension Replacement»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
7. Install the left fender liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
8. Refill the engine with oil and check for leaks.

Scheme 8

1. Remove the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. Disconnect the engine wiring harness from the cooling fan shroud.
3. Disconnect the surge tank outlet hose from the retaining clips on the cooling fan shroud and position aside.
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
5. Remove the stabilizer shaft. Refer to «Stabilizer Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system)
6. Disconnect the cooling fan electrical connector.
7. Vehicles equipped with transmission fluid cooler, disconnect the lower transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) for the 6L80-E transmission or «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/manual-trans/#manual-transmission-tremec-6-speed) for the Tremec 6-Speed transmission.
8. Vehicles equipped with an engine oil cooler, disconnect the upper and lower engine oil cooler pipes. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
9. Remove the cooling fan shroud retaining bolts.
10. Remove the cooling fan and shroud.

Note. Ensure the cooling fan and shroud is properly seated on the radiator

1. Install the cooling fan and shroud.
2. Install the cooling fan shroud retaining bolts. 9 N.m (80 lb in)
3. Vehicles equipped with transmission fluid cooler, connect the lower transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) for the 6L80-E transmission or «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/manual-trans/#manual-transmission-tremec-6-speed) for the Tremec 6-Speed transmission.
4. Vehicles equipped with an engine oil cooler, connect the upper and lower engine oil cooler pipes. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
5. Connect the cooling fan electrical connector.
6. Install the stabilizer shaft. Refer to «Stabilizer Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system)
7. Lower the vehicle.
8. Connect the surge tank outlet hose to the retaining clips on the cooling fan shroud.
9. Connect the engine wiring harness to the cooling fan shroud.
10. Install the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

1. Remove the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. Disconnect the engine wiring harness from the cooling fan shroud.
3. Disconnect the surge tank outlet hose from the retaining clips on the cooling fan shroud and position aside.
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
5. Remove the stabilizer shaft. Refer to «Stabilizer Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system)
6. Disconnect the cooling fan electrical connector.
7. Vehicles equipped with transmission fluid cooler, disconnect the lower transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) for the 6L80-E transmission or «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/manual-trans/#manual-transmission-tremec-6-speed) for the Tremec 6-Speed transmission.
8. Vehicles equipped with an engine oil cooler, disconnect the upper and lower engine oil cooler pipes. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
9. Remove the cooling fan shroud retaining bolts (1).
10. Remove the cooling fan and shroud (2).

1. Install the cooling fan and shroud (2).
2. Install the cooling fan shroud retaining bolts (1). 9 N.m (80 lb in)
3. Vehicles equipped with transmission fluid cooler, connect the lower transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) for the 6L80-E transmission or «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/manual-trans/#manual-transmission-tremec-6-speed) for the Tremec 6-Speed transmission.
4. Vehicles equipped with an engine oil cooler, connect the upper and lower engine oil cooler pipes. Refer to «Engine Oil Cooler Pipe/Hose Quick Connect Fitting Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
5. Connect the cooling fan electrical connector.
6. Install the stabilizer shaft. Refer to «Stabilizer Shaft Replacement»(/chevrolet/corvette/c6-2004-2014/remont/suspension-front/#front-suspension-system)
7. Lower the vehicle.
8. Connect the surge tank outlet hose to the retaining clips on the cooling fan shroud.
9. Connect the engine wiring harness to the cooling fan shroud.
10. Install the radiator support. Refer to «Radiator Support Replacement»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Disconnect the cooling fan control module electrical connector.
3. Remove the cooling fan control module retaining bolt.
4. Remove the cooling fan control module from the vehicle.

1. Install the cooling fan control module to the vehicle.
2. Install the cooling fan control module retaining bolt and tighten to 6 N.m (53 lb in).
3. Connect the cooling fan control module electrical connector.
4. Lower the vehicle.
5. Refer to «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for programming and setup information.

Note. The engine cooling system thermostat and water pump will not function correctly if oil is present in the cooling system. The cooling system MUST be flushed, the water pump and thermostat replaced if oil is found in the cooling system.

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Reposition the outlet hose clamp at the water pump inlet.
3. Remove the outlet hose from the water pump inlet.
4. Remove the water pump inlet bolts.
5. Remove the water pump inlet.
6. The O-ring seal is integral to the thermostat housing.
7. Remove the thermostat housing.

1. Install the thermostat housing.
2. Ensure the thermostat housing has an O-ring seal and is in the groove correctly.
3. Install the water pump inlet (with thermostat).
4. Install the water pump inlet bolts. Tighten: Tighten the water pump inlet bolts to 15 N.m (11 lb ft).
5. Install the outlet hose to the water pump inlet.
6. Position the outlet hose clamp at the water outlet.
7. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

Scheme 9

Scheme 10

Note. Removal of the intake manifold is NOT required to service the coolant air bleed pipe, but is required to service the coolant air bleed pipe covers and/or gaskets.

1. Drain a gallon of coolant. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the intake manifold sight shields. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
3. Remove the throttle air body assembly (1). Refer to «Throttle Body Assembly Replacement (Without LS9)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) or «Throttle Body Assembly Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) .
4. Remove the coolant air bleed hose (2).
5. Remove the coolant air bleed pipe mounting bolts (3).
6. Remove the coolant air bleed pipe (4) and O-rings (5).

1. Position the coolant air bleed pipe (4) and O-rings (5) on the cylinder heads.
2. Install the mounting bolts for the coolant air bleed pipe.
3. Tighten the coolant air bleed pipe mounting bolts (3). Tighten: Tighten the coolant air bleed pipe cover bolts to 12 N.m (106 lb in).
4. Install the coolant air bleed hose (2).
5. Install the throttle air body assembly (1). Refer to «Throttle Body Assembly Replacement (Without LS9)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) or «Throttle Body Assembly Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) .
6. Install the intake manifold sight shields. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
7. Refill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

1. Remove the air cleaner intake duct.
2. Remove the accessory drive belt. Refer to «Drive Belt Replacement - Accessory (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Drive Belt Replacement - Accessory (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
3. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
4. Reposition the inlet and outlet hose clamps at the water pump.
5. Remove the inlet and outlet hoses from the water pump.
6. Reposition the heater inlet and surge tank outlet hose clamps at the water pump.
7. Remove the heater inlet and surge tank outlet hoses from the water pump.
8. Remove the water pump bolts.
9. Remove the water pump.
10. Remove the water pump gaskets.
11. Clean and inspect the water pump.

1. Install the water pump and gaskets to the engine block.
2. Install the water pump bolts. Tighten: Tighten the water pump bolts a first pass to 15 N.m (11 lb ft). Tighten the water pump bolts a final pass to 30 N.m (22 lb ft).
3. Install the heater inlet and surge tank outlet hoses to the water pump.
4. Position the heater inlet and surge tank outlet hose clamps at the water pump.
5. Install the inlet and outlet hoses to the water pump.
6. Position the inlet and outlet hose clamps at the water pump.
7. Install the accessory drive belt. Refer to «Drive Belt Replacement - Accessory (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Drive Belt Replacement - Accessory (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) .
8. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
9. Install the air cleaner intake duct.

J 38185: Hose Clamp Pliers

1. Drain the charge air cooler coolant system. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
2. Remove upper intake manifold sight shield. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8)
3. Disconnect the quick connect fitting (1) at the cooler. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
4. Remove the charge air cooler coolant hose (2) from the cooler.
5. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
6. Remove the right front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody)
7. Disengage tension on the charge air cooler coolant hose clamp (1) using J 38185: Hose Clamp Pliers
8. Remove the charge air cooler coolant hose (2) from the pump.
9. Remove the charge air cooler coolant hose from the vehicle.

1. Install the charge air cooler coolant hose to the vehicle.
2. Install the charge air cooler coolant hose (2) to the pump.
3. Engage tension on the charge air cooler coolant hose clamp (1) using J 38185: Hose Clamp Pliers
4. Install the right front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement (Front Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Front Wheelhouse Liner Replacement (Rear Liner)»(/chevrolet/corvette/c6-2004-2014/remont/frames-subframes-crossmembers/#frame-and-underbody)
5. Lower the vehicle.
6. Install the charge air cooler coolant hose (2) to the cooler.
7. Connect the quick connect fitting (1) at the cooler. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)
8. Install upper intake manifold sight shield. Refer to «Upper Intake Manifold Sight Shield Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8) or «Upper Intake Manifold Sight Shield Replacement (w/o LS9)»(/chevrolet/corvette/c6-2004-2014/remont/mechanical/#engine-mechanical-62l-or-70l-2-of-8)
9. Fill the charge air cooler coolant system. Refer to «Charge Air Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system)

Scheme 11

1. J 38185: Hose Clamp Pliers
2. J 39400-A: Halogen Leak Detector

1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Remove the condenser. Refer to «Air Conditioning Condenser Replacement»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
4. Disengage tension on the radiator inlet hose clamp at the radiator using J 38185: Hose Clamp Pliers.
5. Disconnect the radiator inlet hose from the radiator.
6. Remove the cooling fan and shroud assembly from the radiator. Refer to «Cooling Fan and Shroud Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling Fan and Shroud Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
7. Disengage tension and reposition the surge tank inlet hose clamp at the radiator.
8. Disconnect the surge tank inlet hose from the radiator.
9. Vehicles equipped with a transmission oil cooler, disconnect the upper transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
10. Vehicles equipped with a engine oil cooler, disconnect the upper engine oil cooler line from the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
11. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
12. Disengage tension on the radiator outlet hose clamp at the radiator using the J 38185: Hose Clamp Pliers.
13. Disconnect the radiator outlet hose from the radiator.
14. Vehicles equipped with a transmission oil cooler, disconnect the lower transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
15. Vehicles equipped a with engine oil cooler, disconnect the lower engine oil cooler line from the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
16. Remove the radiator from the vehicle.

1. Install the radiator to the vehicle.
2. Raise the vehicle.
3. Vehicles equipped with a engine oil cooler, connect the lower engine oil cooler line to the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
4. Vehicles equipped with a transmission oil cooler, connect the lower transmission oil cooler line to the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
5. Connect the radiator outlet hose to the radiator.
6. Engage tension on the radiator outlet hose clamp at the radiator.
7. Lower the vehicle.
8. Vehicle equipped with a transmission oil cooler, connect the upper transmission oil cooler line to the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
9. Vehicles equipped with a engine oil cooler, connect the upper engine oil cooler line to the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
10. Connect the surge tank inlet hose to the radiator.
11. Engage tension on the surge tank inlet hose clamp at the radiator using J 38185: Hose Clamp Pliers.
12. Install the cooling fan and shroud assembly to the radiator. Refer to «Cooling Fan and Shroud Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling Fan and Shroud Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
13. Connect the radiator inlet hose to the radiator.
14. Engage tension on the radiator inlet hose clamp at the radiator using J 38185: Hose Clamp Pliers.
15. Install the condenser. Refer to «Air Conditioning Condenser Replacement»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
16. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
17. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
18. Leak test the fittings of the component using J 39400-A: Halogen Leak Detector.
19. Inspect the transmission fluid level. Refer to «Transmission Fluid Check»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis__transmission-fluid-check) .

1. J 38185: Hose Clamp Pliers
2. J 39400-A: Halogen Leak Detector

1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Remove the condenser. Refer to «Air Conditioning Condenser Replacement»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
4. Disconnect the radiator inlet hose quick connect fitting (1) at the radiator.
5. Disconnect the radiator inlet hose from the radiator.
6. Remove the cooling fan and shroud assembly from the radiator. Refer to «Cooling Fan and Shroud Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling Fan and Shroud Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
7. Disconnect the surge tank inlet hose quick connect fitting (1) from the radiator.
8. Disconnect the surge tank inlet hose (2) from the radiator.
9. Vehicles equipped with a transmission oil cooler, disconnect the upper transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
10. Vehicles equipped with a engine oil cooler, disconnect the upper engine oil cooler line from the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
11. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
12. Disengage tension on the radiator outlet hose clamp (1) at the radiator using the J 38185: Hose Clamp Pliers.
13. Disconnect the radiator outlet hose (2) from the radiator.
14. Vehicles equipped with a transmission oil cooler, disconnect the lower transmission oil cooler line from the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
15. Vehicles equipped a with engine oil cooler, disconnect the lower engine oil cooler line from the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
16. Remove the radiator from the vehicle.

1. Install the radiator to the vehicle.
2. Raise the vehicle.
3. Vehicles equipped with a engine oil cooler, connect the lower engine oil cooler line to the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
4. Vehicles equipped with a transmission oil cooler, connect the lower transmission oil cooler line to the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
5. Connect the radiator outlet hose (2) to the radiator.
6. Engage tension on the radiator outlet hose clamp (2) at the radiator.
7. Lower the vehicle.
8. Vehicle equipped with a transmission oil cooler, connect the upper transmission oil cooler line to the radiator. Refer to «Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis) .
9. Vehicles equipped with a engine oil cooler, connect the upper engine oil cooler line to the radiator. Refer to «Engine Oil Cooler Hose/Pipe Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Engine Oil Cooler Hose/Pipe Replacement (w/o KPS)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
10. Connect the surge tank inlet hose (2) to the radiator.
11. Connect the surge tank inlet hose quick connect fitting (1) from the radiator.
12. Install the cooling fan and shroud assembly to the radiator. Refer to «Cooling Fan and Shroud Replacement (LS3, LS7)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling Fan and Shroud Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
13. Connect the radiator inlet hose to the radiator.
14. Connect the radiator inlet hose quick connect fitting (1) at the radiator.
15. Install the condenser. Refer to «Air Conditioning Condenser Replacement»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
16. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
17. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/corvette/c6-2004-2014/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
18. Leak test the fittings of the component using J 39400-A: Halogen Leak Detector.
19. Inspect the transmission fluid level. Refer to «Transmission Fluid Check»(/chevrolet/corvette/c6-2004-2014/remont/automatic-trans/#how-to-overhaul-the-automatic-transmission-6l80-removal-installation-service-troubleshooting-diagnosis__transmission-fluid-check) .

Scheme 12

1. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement (6.2L)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) or «Air Cleaner Assembly Replacement (7.0L)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) or «Air Cleaner Assembly Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) .
2. Disconnect the surge tank inlet hose assembly from the radiator support tabs.
3. Remove the radiator support bolts.
4. Remove the radiator support.

1. Install the radiator support.
2. Install the radiator support bolts and tighten to 9 N.m (80 lb in).
3. Connect the surge tank inlet hose assembly to the radiator support tabs.
4. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement (6.2L)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) or «Air Cleaner Assembly Replacement (7.0L)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) or «Air Cleaner Assembly Replacement (LS9)»(/chevrolet/corvette/c6-2004-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-or-70l-introduction) .

1. Disconnect the ambient air temperature sensor electrical connector.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Remove the outer front fascia mounting screws.
4. Remove the air baffle mounting screws.
5. Remove the RH radiator air baffle lower screw.
6. Remove the LH side air deflector retainer pins.
7. Remove the RH side air deflector retainer pins.
8. Lower the vehicle.
9. Remove the LH radiator air baffle upper retainer pin (1).
10. Remove the RH radiator air baffle upper retainer pin (1).
11. Remove the radiator air baffle.

1. Install the radiator air baffle.
2. Install the RH radiator air baffle upper retainer pin (1).
3. Install the LH radiator air baffle upper retainer pin (1).
4. Raise and support the vehicle.
5. Install the RH side air deflector retainer pins.
6. Install the LH side air deflector retainer pins.
7. Install the RH radiator air baffle lower screw. Tighten: Tighten the bolt to 2.5 N.m (22 lb in).
8. Install the air baffle mounting screws. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
9. Install the outer front fascia mounting screws. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
10. Lower the vehicle.
11. Connect the ambient air temperature sensor electrical connector.

1. Disconnect the ambient air temperature sensor electrical connector.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Remove the auxiliary engine oil cooler. Refer to «Auxiliary Engine Oil Cooler Replacement (Z06)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Auxiliary Engine Oil Cooler Replacement (Z51)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
4. Remove the outer front fascia mounting screws.
5. Remove the air baffle mounting screws.
6. Remove the RH radiator air baffle lower screw.
7. Remove the LH side air deflector retainer pins.
8. Remove the RH side air deflector retainer pins.
9. Lower the vehicle.
10. Remove the LH radiator air baffle upper retainer pin (1).
11. Remove the RH radiator air baffle upper retainer pin (1).
12. Remove the radiator air baffle.

1. Install the radiator air baffle.
2. Install the RH radiator air baffle upper retainer pin (1).
3. Install the LH radiator air baffle upper retainer pin (1).
4. Raise and support the vehicle.
5. Install the RH side air deflector retainer pins.
6. Install the LH side air deflector retainer pins.
7. Install the RH radiator air baffle lower screw. Tighten: Tighten the bolt to 2.5 N.m (22 lb in).
8. Install the air baffle mounting screws. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
9. Install the auxiliary engine oil cooler. Refer to «Auxiliary Engine Oil Cooler Replacement (Z06)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Auxiliary Engine Oil Cooler Replacement (Z51)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
10. Install the outer front fascia mounting screws. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
11. Lower the vehicle.
12. Connect the ambient air temperature sensor electrical connector.

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the tire and wheel, if necessary. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
3. Disconnect the engine coolant heater cord from the engine coolant heater.
4. Remove the engine coolant heater.
5. Clean the opening in the engine block, remove any burrs, sealing compound, or paint.

1. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine coolant heater sealing washer.
2. Insert the engine coolant heater.
3. Tighten the engine coolant heater. Tighten: Tighten the engine coolant heater to 40 N.m (30 lb ft).
4. Install the engine coolant heater cord to the engine coolant heater.
5. Install the tire and wheel, if necessary. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
6. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/corvette/c6-2004-2014/remont/cooling-system-mechanical/#engine-cooling-system) .

1. Disconnect the engine coolant heater cord from the engine coolant heater.
2. Remove the engine coolant heater cord clip bolt.
3. Remove the engine coolant heater cord strap at the secondary air injection pump hose.
4. Remove the engine coolant heater cord.

1. Install the engine coolant heater cord to the engine coolant heater.
2. Position the engine coolant heater cord clip and install the bolt. Tighten: Tighten the engine coolant heater cord clip bolt to 32 N.m (24 lb ft).
3. Route the engine coolant heater cord over the generator.
4. Coil the engine coolant heater cord into a bundle and secure the bundle to the secondary air injection hose pump with the strap.

Cooling Fan Control

The engine cooling fan is a variable speed fan. The engine control module (ECM) controls the fan speed by sending a pulse width modulated (PWM) signal to the cooling fan control module. The cooling fan control module varies the voltage drop across the cooling fan motor in relation to the pulse width modulated signal.

Cooling fan speed is effected by many different conditions and can be adjusted from 10-90 percent duty cycle, 90 percent is considered high speed fan. When multiple cooling fan speed requests are received, the ECM uses the highest cooling fan speed of all the requests. The ECM commands the fans ON under the following conditions

1. The engine coolant temperature goes above a calibrated amount.
2. The engine oil temperature goes above a calibrated amount.
3. The A/C pressure reaches a calibrated temperature.
4. After the engine is shut OFF, if the engine coolant temperature at key-off is greater than a calibrated amount, or the A/C pressure is greater than a calibrated amount, the cooling fan is set to low speed. The fan will shut OFF if the temperature or pressure drops below a calibrated amount. The fans will shut OFF after 2 minutes, regardless of coolant temperature.

Cooling Fan Control - Variable Speed Single Fan System

The engine cooling fan is a variable speed fan. The engine control module (ECM) controls the fan speed by sending a pulse width modulated signal to the cooling fan control module. The cooling fan control module varies the voltage drop across the cooling fan motor in relation to the pulse width modulated signal.

Cooling fan speed is effected by many different conditions and can be adjusted from 10% to 90% duty cycle (PWM), 90% is considered high speed fan. When multiple cooling fan speed requests are received the ECM uses the highest cooling fan speed of all the requests. The ECM commands the cooling fan ON under the following conditions

1. Cooling fan duty cycle starts when engine coolant temperature reaches approximately 95°C (204°F) and reaches high speed at temperatures above 113°C (235°F).
2. Cooling fan duty cycle starts when A/C pressure reaches approximately 1100 kPa (160 psi) and reaches high speed at A/C pressures above 2480 kPa (360 psi).
3. At engine oil temperatures above approximately 150°C (302°F) the cooling fan duty cycle will be commanded to high speed.
4. At transmission oil temperatures above approximately 132°C (270°F) the cooling fan duty cycle will be commanded to high speed.
5. After the vehicle is shut OFF if the engine coolant temperature at key-off is greater than 113°C (235°F) or the A/C pressure is greater than 1720 kPa (249 psi) the cooling fan duty cycle is set to 50%, low speed. If the coolant temperature drops below 110°C (230°F) and the A/C pressure drops below 1660 kPa (241 psi) the fan will shut OFF. The fans will automatically shut OFF after 2 min. regardless of coolant temperature.

Low Coolant Message

The engine cooling system utilizes an algorithm based low coolant level system which eliminates the need for the coolant level sensor previously positioned inside the surge tank. The algorithm measures the difference in engine coolant temperature readings over time as a function of engine speed, to determine if the cooling system has a low coolant condition. After vehicle start up, the engine control module (ECM) sends an engine RPM and engine coolant temperature message through the body control module (BCM) to the HVAC control module. The HVAC control module uses engine coolant temperature and engine RPM to determine if an increase in engine coolant temperature is due to a low coolant level condition. This system is capable of losing 2 full liters of coolant before triggering the Low Coolant indicator. Because the surge tank holds approximately 0.8 liters when filled to the proper level, its possible that the Low Coolant indicator will not be triggered, even though the surge tank is completely dry.

COOLANT OVER TEMP

The IPC illuminates the COOLANT OVER TEMP indicator in the message center when the following occurs

1. The PCM detects that the engine coolant temperature exceeds 124°C (256°F). The IPC receives a class 2 message from the PCM indicating the high coolant temperature.
2. The IPC will also illuminate the CHECK GAGES indicator and a chime sounds when this condition exists.

The cooling system's function is to maintain an efficient engine operating temperature during all engine speeds and operating conditions. The cooling system is designed to remove approximately one-third of the heat produced by the burning of the air-fuel mixture. When the engine is cold, the system cools slowly or not at all. This allows the engine to warm quickly.

Cooling Cycle

Coolant is drawn from the radiator outlet and into the water pump inlet by the water pump. Some coolant will then be pumped from the water pump, to the heater core, then back to the water pump. This provides the passenger compartment with heat and defrost.

Coolant is also pumped through the water pump outlet and into the engine block. In the engine block, the coolant circulates through the water jackets surrounding the cylinders where it absorbs heat.

The coolant is then forced through the cylinder head gasket openings and into the cylinder heads. In the cylinder heads, the coolant flows through the water jackets surrounding the combustion chambers and valve seats, where it absorbs additional heat.

Coolant is also directed to the throttle body. There it circulates through passages in the casting. During initial start up, the coolant assists in warming the throttle body. During normal operating temperatures, the coolant assists in keeping the throttle body cool.

From the cylinder heads, the coolant is then forced to the thermostat. The flow of coolant will either be stopped at the thermostat until the engine is warmed, or it will flow through the thermostat and into the radiator where it is cooled and the coolant cycle is completed.

Operation of the cooling system requires proper functioning of all cooling system components. The cooling system consists of the following components

Coolant

The engine coolant is a solution made up of a 50-50 mixture of DEX-COOL and clean drinkable water. The coolant solution carries excess heat away from the engine to the radiator, where the heat is dissipated to the atmosphere.

Radiator

The radiator is a heat exchanger. It consists of a core and two tanks. The aluminum core is a crossflow tube and fin design. This is a brazed tube with convoluted louvered fin design. Separate tubes and fins are stacked together with a manifold at each end. The entire assembly is then brazed forming a homogeneous unified structure. The fins allow for efficient heat transfer from the coolant to the atmosphere. The inlet and outlet tanks are molded with a high temperature, glass reinforced nylon plastic. The tank and gasket is supplied as an assembly with silicone gasket attached to the tank. The tanks are clamped to the core with clinch tabs. The tabs are part of the aluminum header at each end of the core. The radiator also has a drain cock which is located in the bottom of the passenger side tank. The drain cock includes the drain cock and drain cock seal.

The radiator removes heat from the coolant passing through it. The fins on the core absorb heat from the coolant passing through the tubes. As air passes between the fins, it absorbs heat and cools the coolant.

During vehicle use, the coolant heats and expands. The coolant that is displaced by this expansion flows into the surge tank. As the coolant circulates, air is allowed to exit. Coolant without bubbles absorbs heat much better than coolant with bubbles.

Pressure Cap

The pressure cap is a cap that seals and pressurizes the cooling system. It contains a blow off or pressure valve and a vacuum or atmospheric valve. The pressure valve is held against its seat by a spring and protects the radiator by relieving pressure if it exceeds 18 psi. The vacuum valve is held against its seat by a spring, which permits opening of the valve to relieve vacuum created in the cooling system as it cools off. The vacuum, if not relieved, could cause the radiator hoses to collapse.

The pressure cap allows pressure in the cooling system to build up. As the pressure builds, the boiling point of the coolant goes up as well. Therefore, the coolant can be safely run at a temperature higher than the boiling point of the coolant at atmospheric pressure. The hotter the coolant is, the faster the heat moves from the radiator to the cooler passing air. However, if the pressure exceeds the strength of the spring, the pressure valve rises so that the excess pressure can escape. When the engine cools down, the temperature of the coolant drops and a vacuum is created in the cooling system. This vacuum causes the vacuum valve to open, allowing outside air into the cooling system. This equalizes the pressure in the cooling system with atmospheric pressure, thus preventing the radiator hoses from collapsing.

Surge Tank

The surge tank is a plastic tank with a pressure cap mounted to it. The tank is mounted at a point higher than all other coolant passages. The surge tank provides an air space in the cooling system. The air space allows the coolant to expand and contract. The surge tank also provides a coolant fill point and a central air bleed location.

During vehicle use, the coolant heats and expands. The coolant that is displaced by this expansion flows into the surge tank. As the coolant circulates, air is allowed to exit. This is an advantage to the cooling system. Coolant without bubbles absorbs heat much better than coolant with bubbles.

Air Baffles and Seals

The cooling system uses deflectors, air baffles and air seals to increase system cooling. Deflectors are installed under the vehicle to redirect airflow beneath the vehicle to flow through the radiator and increase cooling. Air baffles are also used to direct airflow into the radiator and increase cooling. Air seals prevent air from bypassing the radiator and A/C condenser. Air seals also prevent recirculation of the air for better hot weather cooling and A/C condenser performance.

Charge Air Cooling System (LS9)

The charge air cooling systems function is to reduce the temperature of the air charge that is heated during the supercharging process which improves the efficiency and performance of the powertrain. The charge air cooling system is an air-to-water system that uses a separate charge air cooling radiator located in front of the condenser and the radiator to cool the air charge. An electric pump is used to flow coolant from the charge air cooler, through the supercharger and charge air cooler reservoir, then back to the charge air cooler where the cycle repeats.

Water Pump

The water pump is a centrifugal vane impeller type pump. The pump consists of a housing with coolant inlet and outlet passages and an impeller. The impeller is a flat plate mounted on the pump shaft with a series of flat or curved blades or vanes. When the impeller rotates, the coolant between the vanes is thrown outward by centrifugal force. The impeller shaft is supported by one or more sealed bearings. These sealed bearings never need to be lubricated. With a sealed bearing, grease cannot leak out, and dirt and water cannot get in.

The purpose of the water pump is to circulate coolant throughout the cooling system. The water pump is driven by the crankshaft via the drive belt.

Thermostat

The thermostat is a coolant flow control component. Its purpose is to regulate the operating temperature of the engine. It utilizes a temperature sensitive wax-pellet element. The element connects to a valve through a piston. When the element is heated, it expands and exerts pressure against a rubber diaphragm. This pressure forces the valve to open. As the element is cooled, it contracts. This contraction allows a spring to push the valve closed.

When the coolant temperature is below 87°C (187°F), the thermostat valve remains closed. This prevents circulation of the coolant from the radiator to the water pump and allows the engine to warm up quickly. After the coolant temperature reaches 87°C (187°F), the thermostat valve will begin to open. The coolant is then allowed to circulate from the radiator return hose, through the thermostat, and back into the water pump where the engine heat is dissipated to the atmosphere. The thermostat provides a restriction in the cooling system, even after it has opened. This restriction creates a pressure difference which prevents cavitation at the water pump and forces coolant to circulate through the engine block.

Engine Oil Cooler (Base LS3)

The engine oil cooler is a heat exchanger located inside the LH side end tank of the radiator. The engine oil temperature is controlled by the temperature of the engine coolant that surrounds the oil cooler in the radiator.

The engine oil pump, pumps the oil through the engine oil cooler line to the oil cooler. The oil then flows through the cooler where the engine coolant absorbs heat from the oil. The oil is then pumped through the oil cooler return line, to the engine block system.

Engine Oil Cooler (LS7 or L51)

The engine oil cooler is a heat exchanger located on the left side of the radiator shroud. The engine oil temperature is controlled by airflow that passes through the oil cooler.

The engine oil pump, pumps the oil through the engine oil cooler line to the oil cooler, The oil then flows through the cooler where the air absorbs heat from the oil. The oil is then pumped through the oil cooler return line to the engine block oil system.

Engine Oil Cooler (LS9)

The engine oil cooler is a heat exchanger located on the lower LH lower side of the engine block. The engine oil temperature is controlled by the temperature of the engine coolant that passes through the engine oil cooler as well as air passing by the engine oil cooler plates.

The water pump flows coolant through the engine and then through the radiator where the absorbed heat from the engine is dissipated into the atmosphere. Coolant flows back to the engine as well as to the engine oil cooler through the coolant inlet hose on the lower LH radiator end tank. Coolant flows around the EOC where is absorbs additional heat from the engine oil. Coolant then flows the cooler outlet hose into the engine block where the heat is dispersed back into the cooling system where the cycle starts again.

The engine oil pump flows engine oil through the engine block to the EOC where it disperses heat into the atmosphere and to the engine coolant. The engine oil then flows back into the engine block where the cycle starts again.

Transmission Oil Cooler

The transmission oil cooler is a heat exchanger. It is located inside the right side end tank of the radiator. The transmission fluid temperature is regulated by the temperature of the engine coolant that surrounds the oil cooler as the transmission fluid passes down through the cooler.

The transmission oil pump, pumps the fluid through the transmission oil cooler feed line to the oil cooler. The fluid then flows down through the cooler while the engine coolant absorbs heat from the fluid. The fluid is then pumped through the transmission oil cooler return line, to the transmission.

Coolant Heater

The optional engine coolant heater (RPO K05) is rated at 400 watts and supplies 1365 btu/hr. The engine coolant heater operates using 110-volt AC external power and is designed to warm the coolant in the engine block area for improved starting in very cold weather -29°C (-20°F). The coolant heater helps reduce fuel consumption when a cold engine is warming up. The unit is equipped with a detachable AC power cord. A weather shield on the cord is provided to protect the plug when not in use.

Illustration Tool Number/Description DT 47731 1/2 Inch Quick Connect Release Tool GE 47716 Vac N Fill Coolant Refill Tool J 24460-01 Cooling System Pressure Tester J 24731 Tempil Stick J 26568 Coolant and Battery Fluid Tester J 38185 Hose Clamp Pliers J 39400-A Halogen Leak Detector J 42220 Universal 12V Leak Detection Lamp J 42401 Radiator Cap and Surge Tank Test Adapter

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Scheme 20

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Instrument Cluster Description and Operation
• Indicator/Warning Message Description and Operation
• Audible Warnings Description and Operation
• Coolant in Combustion Chamber
• Coolant in Engine Oil
• Diagnostic Repair Verification
• Checking Aftermarket Accessories
• DTC P0117 or P0118
• Moving Parts and Hot Surfaces Warning
• Approximate Fluid Capacities
• Heater Core Replacement
• Engine Coolant/Water in Transmission
• Engine Will Not Crank - Crankshaft Will Not Rotate
• Lower Engine Noise, Regardless of Engine Speed
• Cylinder Leakage Test
• Lifting and Jacking the Vehicle
• Fastener Caution
• Front Wheelhouse Liner Replacement (Front Liner)
• Front Bumper Fascia Replacement
• Upper Intake Manifold Sight Shield Replacement (LS9)
• Catalytic Converter Replacement - Left Side (7.0L)
• Stabilizer Shaft Replacement
• Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
• Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
• Throttle Body Assembly Replacement (Without LS9)
• Transmission Fluid Check
• Power Steering Cooler Pipe/Hose Replacement (LS9)
• Tire and Wheel Removal and Installation
• DTC P0480
• Symptoms - Engine Cooling
• Thermostat Diagnosis
• Engine Overheating
• Loss of Coolant (LS3, LS7)
• Loss of Coolant (LS9)
• Engine Fails To Reach Normal Operating Temperature
• Flushing (Powertrain)
• Flushing (Charged Air Cooling)