Engine Cooling System: Diagnosis Honda Civic IX

Cooling Fan Controls Symptom Troubleshooting Index

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1. Coolant - Check Check the coolant level in the coolant reservoir. Make sure it is between the MAX mark (A) and MIN mark (B). If the coolant level in the coolant reservoir is at or below the MIN mark, add coolant to bring it between the MIN and MAX marks, then inspect the cooling system for leaks. Check the coolant level in the radiator, and add Honda Long Life Antifreeze/Coolant Type 2 into the radiator up to the base of the filler neck, if needed. NOTE: Always use Honda Long Life Antifreeze/Coolant Type 2. Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Do not add water.

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1. Radiator Cap Wait until the engine is cool, then carefully remove the radiator cap.
2. Vehicle Lift Raise the vehicle on a lift, and make sure it is securely supported.
3. Radiator Coolant - Replacement Loosen the drain plug (A), and drain the coolant.
4. Cylinder Block Coolant - Drain (Except K24Z7 engine) Except K24Z7 engine Remove the drain bolt (A) from the rear side of the engine block. After the coolant has drained, reinstall the drain bolt with a new washer. Tighten the radiator drain plug securely.

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1. Radiator Coolant - Replacement Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100 % concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100 % concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.2 L (41 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.2 L (41 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.2 L (41 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) Except K24Z7 engine Manufacturer Capacity At Coolant Change DENSO 5.59 L (1.477 US gal) TRAD 5.50 L (1.453 US gal) After Engine Overhaul (M/T) DENSO 6.42 L (1.696 US gal) TRAD 6.33 L (1.672 US gal) After Engine Overhaul (A/T) DENSO 6.56 L (1.732 US gal) TRAD 6.47 L (1.709 US gal) After Engine Overhaul (CVT) DENSO 6.52 L (1.722 US gal) TRAD 6.43 L (1.699 US gal) Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) K24Z7 engine Capacity At Coolant Change 5.5 L (1.45 US gal) After Engine Overhaul 6.7 L (1.78 US gal)
2. HDS DLC - Connection Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard. Turn the ignition switch to ON (II). Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.
3. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

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1. Radiator Cap Wait until the engine is cool, then carefully remove the radiator cap.
2. Vehicle Lift Raise the vehicle on a lift, and make sure it is securely supported.
3. Radiator Coolant - Replacement Loosen the drain plug (A), and drain the coolant.
4. Cylinder Block Coolant - Drain (Except K24Z7 engine) Except K24Z7 engine Remove the drain bolt (A) from the rear side of the engine block. After the coolant has drained, reinstall the drain bolt with a new washer. Tighten the radiator drain plug securely.

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1. Radiator Coolant - Replacement (Natural Gas Model) Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100% concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100% concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.1 L (37 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.1 L (37 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.1 L (37 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) At Coolant Change 5.50 L (1.453 US gal) After Engine Overhaul 6.51 L (1.720 US gal)
2. HDS DLC - Connection Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard. Turn the ignition switch to ON (II). Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.
3. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

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Test

Replace the thermostat if it is stuck in the open position at room temperature.

To test a closed thermostat

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1. Thermostat - Test Suspend the thermostat (A) in a container of water. Do not let the thermostat and the thermometer (B) touch the bottom of the hot container. Heat the water, and check the temperature with a thermometer. Check the temperature when the thermostat first opens, and when it is fully open. Measure the lift height of the thermostat when it is fully open. Standard Thermostat Lift Height: Above 8.0 mm (0.315 in) Starts Opening: 168-176 °F (76-80 °C) Fully Open: 194 °F (90 °C)

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1. Thermostat Install the thermostat assembly (A) with new O-ring (B). Connect the lower radiator hose (C).
2. Splash Shield Install the splash shield (A).
3. Radiator Coolant - Replacement Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100 % concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100 % concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.2 L (41 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.2 L (41 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.2 L (41 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) Except K24Z7 engine Manufacturer Capacity At Coolant Change DENSO 5.59 L (1.477 US gal) TRAD 5.50 L (1.453 US gal) After Engine Overhaul (M/T) DENSO 6.42 L (1.696 US gal) TRAD 6.33 L (1.672 US gal) After Engine Overhaul (A/T) DENSO 6.56 L (1.732 US gal) TRAD 6.47 L (1.709 US gal) After Engine Overhaul (CVT) DENSO 6.52 L (1.722 US gal) TRAD 6.43 L (1.699 US gal) Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) K24Z7 engine Capacity At Coolant Change 5.5 L (1.45 US gal) After Engine Overhaul 6.7 L (1.78 US gal)
4. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

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1. Radiator Cap Wait until the engine is cool, then carefully remove the radiator cap.
2. Vehicle Lift Raise the vehicle on a lift, and make sure it is securely supported.
3. Radiator Coolant - Replacement Loosen the drain plug (A), and drain the coolant.
4. Thermostat Remove the thermostat cover (A). Remove the thermostat (B).

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1. Thermostat - Test Suspend the thermostat (A) in a container of water. Do not let the thermostat and the thermometer (B) touch the bottom of the hot container. Heat the water, and check the temperature with a thermometer. Check the temperature when the thermostat first opens, and when it is fully open. Measure the lift height of the thermostat when it is fully open. Standard Thermostat Lift Height: Above 8.0 mm (0.315 in) min. Starts Opening: 176-183 °F (80-84 °C) Fully Open: 203 °F (95 °C)

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1. Thermostat Install the thermostat (A) with a new rubber seal (B). Install the thermostat cover (C).
2. Radiator Coolant - Replacement (Natural Gas Model) Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100% concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100% concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.1 L (37 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.1 L (37 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.1 L (37 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) At Coolant Change 5.50 L (1.453 US gal) After Engine Overhaul 6.51 L (1.720 US gal)
3. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

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1. Radiator Cap Wait until the engine is cool, then carefully remove the radiator cap.
2. Vehicle Lift Raise the vehicle on a lift, and make sure it is securely supported.
3. Radiator Coolant - Replacement Loosen the drain plug (A), and drain the coolant.
4. Thermostat Remove the thermostat cover (A). Remove the thermostat (B).

Replace the thermostat if it is stuck in the open position at room temperature.

To test a closed thermostat

Scheme 23

1. Thermostat - Test Suspend the thermostat (A) in a container of water. Do not let the thermostat and the thermometer (B) touch the bottom of the hot container. Heat the water, and check the temperature with a thermometer. Check the temperature when the thermostat first opens, and when it is fully open. Measure the lift height of the thermostat when it is fully open. Standard Thermostat Lift Height: Above 8.0 mm (0.315 in) min. Starts Opening: 176-183 °F (80-84 °C) Fully Open: 203 °F (95 °C)

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1. Thermostat Install the thermostat (A) with a new rubber seal (B). Install the thermostat cover (C).
2. Radiator Coolant - Replacement Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100 % concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100 % concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.2 L (41 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.2 L (41 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.2 L (41 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) Except K24Z7 engine Manufacturer Capacity At Coolant Change DENSO 5.59 L (1.477 US gal) TRAD 5.50 L (1.453 US gal) After Engine Overhaul (M/T) DENSO 6.42 L (1.696 US gal) TRAD 6.33 L (1.672 US gal) After Engine Overhaul (A/T) DENSO 6.56 L (1.732 US gal) TRAD 6.47 L (1.709 US gal) After Engine Overhaul (CVT) DENSO 6.52 L (1.722 US gal) TRAD 6.43 L (1.699 US gal) Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) K24Z7 engine Capacity At Coolant Change 5.5 L (1.45 US gal) After Engine Overhaul 6.7 L (1.78 US gal)
3. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

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1. Radiator Cap Wait until the engine is cool, then carefully remove the radiator cap.
2. Vehicle Lift Raise the vehicle on a lift, and make sure it is securely supported.
3. Radiator Coolant - Replacement Loosen the drain plug (A), and drain the coolant.
4. Air Cleaner Assembly Disconnect the intake air duct (A) and the intake air pipe (B). Remove the harness clamp (C). Remove the air cleaner (D).
5. Engine Cover Remove the engine cover.
6. Intake Air Duct Remove the intake air duct.
7. Throttle Body - Removal Disconnect the EVAP canister hose (A) and the brake booster vacuum hose (B). Disconnect the connector (A). Remove the harness clamps (B). Remove the throttle body without disconnecting the hoses.
8. Intake Manifold Assembly Remove the intake manifold bracket. Remove the intake manifold (A). Disconnect the PCV hose (A).
9. Radiator Connecting Pipe Disconnect the heater hose (A) and the water bypass hose (B). Remove the harness clamp (C) and the connecting pipe mounting bolt (D). Remove the harness clamps (A) and the connecting pipe (B).
10. ECT Sensor 1 Disconnect the connector. Remove ECT sensor 1 (A).
11. Water Outlet Disconnect the upper radiator hose (A), the heater hose (B), and the water bypass hose (C). Remove the water outlet (A).

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1. Water Outlet Install the water outlet (A) with a new O-ring (B). Connect the upper radiator hose (A), the heater hose (B), and the water bypass hose (C).
2. ECT Sensor 1 Install ECT sensor 1 (A) with a new O-ring (B). Connect the connector.
3. Radiator Connecting Pipe Install the connecting pipe (A) with a new O-ring (B). Install the harness clamps (C). Install the connecting pipe mounting bolt (A) and the harness clamp (B). Connect the heater hose (C) and the water bypass hose (D).
4. Intake Manifold Assembly Connect the PCV hose (A). Install the intake manifold (A) with new gaskets (B). Install the intake manifold bracket.
5. Throttle Body - Installation Install the throttle body (A) with new gasket (B). Install the harness clamps (A). Connect the connector (B). Connect the EVAP canister hose (A) and the brake booster vacuum hose (B).
6. Intake Air Duct Install the intake air duct.
7. Engine Cover Install the engine cover.
8. Air Cleaner Assembly Install the air cleaner (A). Install the harness clamp (B). Connect the intake air pipe (C) and the intake air duct (D).
9. Tubes, Hoses, and Connectors After Installation Check After installation, check that all tubes, hoses, and connectors are installed correctly.
10. Radiator Coolant - Replacement Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100 % concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100 % concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.2 L (41 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.2 L (41 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.2 L (41 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) Except K24Z7 engine Manufacturer Capacity At Coolant Change DENSO 5.59 L (1.477 US gal) TRAD 5.50 L (1.453 US gal) After Engine Overhaul (M/T) DENSO 6.42 L (1.696 US gal) TRAD 6.33 L (1.672 US gal) After Engine Overhaul (A/T) DENSO 6.56 L (1.732 US gal) TRAD 6.47 L (1.709 US gal) After Engine Overhaul (CVT) DENSO 6.52 L (1.722 US gal) TRAD 6.43 L (1.699 US gal) Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) K24Z7 engine Capacity At Coolant Change 5.5 L (1.45 US gal) After Engine Overhaul 6.7 L (1.78 US gal)
11. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

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1. Radiator Cap Wait until the engine is cool, then carefully remove the radiator cap.
2. Vehicle Lift Raise the vehicle on a lift, and make sure it is securely supported.
3. Radiator Coolant - Replacement Loosen the drain plug (A), and drain the coolant.
4. Intake Air Pipe Remove the intake air pipe.
5. Water Outlet Assembly Remove the harness holder (A) from the cylinder head. Disconnect the connector (B). Disconnect the upper radiator hose (A) and the water bypass hose (B). Remove the water outlet (A).
6. ECT Sensor 1 Remove ECT sensor 1 (A).

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1. ECT Sensor 1 Install ECT sensor 1 (A) with a new O-ring (B).
2. Water Outlet Assembly Remove all of the old liquid gasket from the water outlet mating surfaces, the bolts, and the bolt holes. Clean and dry the water outlet mating surfaces. Apply liquid gasket (P/N 08718-0004 or 08718-0009) to the cylinder head mating surface of the water outlet. Install the component within 5 minutes of applying the liquid gasket. NOTE: Apply a 2.5 mm (0.098 in) diameter bead of liquid gasket along the broken line (A). If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply new liquid gasket. Install the water outlet (A). Connect the upper radiator hose (A) and the water bypass hose (B). Connect the connector (A). Install the harness holder (B) to the cylinder head.
3. Intake Air Pipe Install the intake air pipe.
4. Radiator Coolant - Replacement (Natural Gas Model) Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100% concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100% concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.1 L (37 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.1 L (37 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.1 L (37 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) At Coolant Change 5.50 L (1.453 US gal) After Engine Overhaul 6.51 L (1.720 US gal)
5. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

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1. Radiator Cap Wait until the engine is cool, then carefully remove the radiator cap.
2. Vehicle Lift Raise the vehicle on a lift, and make sure it is securely supported.
3. Radiator Coolant - Replacement Loosen the drain plug (A), and drain the coolant.
4. Intake Air Pipe Remove the intake air pipe.
5. Water Outlet Assembly Remove the harness holder (A) from the cylinder head. Disconnect the connector (B). Disconnect the upper radiator hose (A) and the water bypass hose (B). Remove the water outlet (A).
6. ECT Sensor 1 Remove ECT sensor 1 (A).

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1. ECT Sensor 1 Install ECT sensor 1 (A) with a new O-ring (B).
2. Water Outlet Assembly Remove all of the old liquid gasket from the water outlet mating surfaces, the bolts, and the bolt holes. Clean and dry the water outlet mating surfaces. Apply liquid gasket (P/N 08718-0004 or 08718-0009) to the cylinder head mating surface of the water outlet. Install the component within 5 minutes of applying the liquid gasket. NOTE: Apply a 2.5 mm (0.098 in) diameter bead of liquid gasket along the broken line (A). If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply new liquid gasket. Install the water outlet (A). Connect the upper radiator hose (A) and the water bypass hose (B). Connect the connector (A). Install the harness holder (B) to the cylinder head.
3. Intake Air Pipe Install the intake air pipe.
4. Radiator Coolant - Replacement Follow the chart and pour coolant into the radiator up to the base of the filler neck. NOTE: Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100 % concentration coolant. Do not add water to either coolant. If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C), a 60 % concentration of coolant should be used. Operation Vehicle Usage (Desired Mixture) Current Mixture Coolant Drain Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (100 % concentrate) Then add Honda Long Life Antifreeze/Coolant Type 2 (50/50) Coolant Change Normal Area (50/50) 50/50 60/40 unknown Drain radiator, engine block, and reservoir None Top off the cooling system Very Cold Area (60/40) 50/50 unknown Drain radiator, engine block, and reservoir About 1.3 L (44 fl oz) 60/40 About 1.2 L (41 fl oz) Engine Overhaul Normal Area (50/50) - - None Very Cold Area (60/40) - - About 1.2 L (41 fl oz) Coolant Winterizing Very Cold Area (60/40) 50/50 Drain about 2.0 L (68 fl oz) from radiator About 1.2 L (41 fl oz) unknown (1) Drain radiator, engine block, and reservoir (1) When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) Except K24Z7 engine Manufacturer Capacity At Coolant Change DENSO 5.59 L (1.477 US gal) TRAD 5.50 L (1.453 US gal) After Engine Overhaul (M/T) DENSO 6.42 L (1.696 US gal) TRAD 6.33 L (1.672 US gal) After Engine Overhaul (A/T) DENSO 6.56 L (1.732 US gal) TRAD 6.47 L (1.709 US gal) After Engine Overhaul (CVT) DENSO 6.52 L (1.722 US gal) TRAD 6.43 L (1.699 US gal) Engine Coolant Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal) K24Z7 engine Capacity At Coolant Change 5.5 L (1.45 US gal) After Engine Overhaul 6.7 L (1.78 US gal)
5. Maintenance Minder Reset After doing all procedures, select the individual maintenance item you wish to reset with the HDS (See the Maintenance Minder General Information).

Water Pump Inspection (K24Z7)

SPECIAL TOOL DESCRIPTION Image Description/Tool Number Belt Tension Release Tool Snap-on YA9317 (1) , commercially available (1) Available through the Honda Tool and Equipment Program 888-424-6857

Scheme 82

Scheme 83

1. Drive Belt Move the auto-tensioner (A) using the belt tension release tool in the direction of the arrow to relieve tension from the drive belt, then remove the drive belt.

Scheme 84

1. Water Pump - Inspection Turn the water pump pulley counterclockwise, and check that it turns freely and smoothly. If it does not turn smoothly, replace the water pump. NOTE: When you check the water pump, you may see a small amount of "weeping" from the bleed holes (A). This is normal.

Scheme 85

1. Drive Belt Install the drive belt.

See also:
• REMOVAL AND INSTALLATION