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Engine Cooling System Acura ZDX I

Cooling Fan 31 illustrations ~1855 words

Scheme 1

Scheme 1: Component Location Index
Scheme 1: Component Location Index

Scheme 2

Scheme 2: Radiator Cap Test
Scheme 2: Radiator Cap Test
  1. Wait until the engine is cool, then carefully remove the radiator cap (A). Wet the radiator cap seal with engine coolant, then install it on a commercially available pressure tester (B).
  2. Apply a pressure of 93.3-122.7 kPa (0.951 - 1.251 kgf/cm 2 , 13.53-17.79 psi).
  3. Check for a drop in pressure.
  4. If the pressure drops, replace the radiator cap.

Scheme 3

Scheme 3: Radiator Test
Scheme 3: Radiator Test
  1. Wait until the engine is cool, then carefully remove the radiator cap, and fill the radiator with engine coolant to the base of the filler neck.
  2. Attach a commercially available pressure tester (A) to the radiator, and apply a pressure of 93.3-122.7 kPa (0.951-1.251 kgf/cm 2 , 13.53-17.80 psi).
  3. Inspect for engine coolant leaks and a drop in pressure.
  4. Remove the tester, then reinstall the radiator cap.

Scheme 4

Scheme 4: Fan Motor Test
Scheme 4: Fan Motor Test
  1. Disconnect the 2P connectors from the radiator fan motor (A) and the A/C condenser fan motor (B).
  2. Test each motor by connecting battery power to terminal No. 2 and ground to terminal No. 1.
  3. If either motor fails to run or does not run smoothly, replace it (see «FAN, FAN MOTOR, AND SHROUD REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).

Thermostat Test

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

To test a closed thermostat

Scheme 5

Scheme 5: Thermostat Test
Scheme 5: Thermostat Test
  1. Suspend the thermostat (A) in a container of water. Do not let the thermometer and the thermometer (B) touch the bottom of the hot container.
  2. Heat the water and check the temperature with a thermometer. Check the temperature at which the thermostat first opens, and at which it is fully open.
  3. Measure the lift height of the thermostat when it is fully open. Standard Thermostat Lift Height: Above 10.0 mm (0.394 in) Starts Opening: 169-176 °F (76-80 °C) Fully Open: 194°F (90°C)

Scheme 6

Scheme 6: Water Pump Inspection
Scheme 6: Water Pump Inspection
  1. Remove the timing belt (see «TINNING BELT REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#cylinder-head) ).
  2. Turn the water pump pulley counterclockwise, and check that it turns freely. If it does not turn freely, replace the water pump (see «WATER PUMP INSPECTION»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ). NOTE: When you check the water pump, you may see a small amount of "weeping" from the bleed holes (A). This is normal.
  3. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#cylinder-head__timing-belt-installation) ).

Scheme 7

Scheme 7: Water Pump Replacement
Scheme 7: Water Pump Replacement
  1. Drain the engine coolant (see «COOLANT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  2. Remove the timing belt (see «TINNING BELT REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#cylinder-head) ).
  3. Remove the timing belt adjuster (see «TIMING BELT ADJUSTER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/mechanical/#cylinder-head) ).
  4. Remove the five bolts securing the water pump (A), then remove the water pump.
  5. Inspect and clean the mating surface of the engine block.
  6. Install the water pump with a new O-ring (B).
  7. Clean up any spilled engine coolant.
  8. Install the timing belt adjuster (see «TIMING BELT ADJUSTER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/mechanical/#cylinder-head) ).
  9. Install the timing belt (see «TIMING BELT INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#cylinder-head__timing-belt-installation) ).
  10. Refill the radiator with engine coolant, then bleed the air from the cooling system (see «COOLANT CHECK»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).

Scheme 8

Scheme 8: Coolant Check
Scheme 8: Coolant Check
  1. Check the coolant level in the coolant reservoir. Make sure it is between the MAX mark (A) and the MIN mark (B).
  2. 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.
  3. Check the coolant level in the radiator, and add Acura Long Life Antifreeze/Coolant Type 2 into the radiator up to the base of the filler neck, if needed. NOTE: Always use Acura Long Life Antifreeze/Coolant Type 2. Using a non-Acura coolant can result in corrosion, causing the cooling system to malfunction or fail. Acura Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Do not add water.

Scheme 9

Scheme 9: Coolant Replacement
Scheme 9: Coolant Replacement

Scheme 10

Scheme 10
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Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12
  1. Wait until the engine is cool, then carefully remove the radiator cap.
  2. Loosen the drain plug (A) and drain the coolant.
  3. Install a rubber hose (A) on the drain bolt (B) located at the rear of the engine block, then loosen the drain bolt.
  4. When the coolant stops draining, tighten the drain bolt. Remove the rubber hose.
  5. Tighten the radiator drain plug securely.
  6. Remove, drain, and reinstall the coolant reservoir.
  7. Fill the coolant reservoir to the MAX mark (A) with Acura Long Life Antifreeze/Coolant Type 2.
  8. Pour Acura Long Life Antifreeze/Coolant Type 2 into the radiator up to the base of the filler neck. NOTE: Always use Acura Long Life Antifreeze/Coolant Type 2. Using a non-Acura coolant can result in corrosion, causing the cooling system to malfunction or fail. Acura Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Do not add water. Engine Coolant Capacities (Including the coolant reservoir capacity of 0.675 L (0.1783 US gal)): At Coolant Change: 6.7 L (1.77 US gal) After Engine Overhaul: 8.6 L (2.27 US gal)
  9. Loosely install the radiator cap.
  10. Start the engine, and let it run until it warms up (the radiator fan comes on at least twice).
  11. Turn off the engine. Check the level in the radiator, and add Acura Long Life Antifreeze/Coolant Type 2, if needed.
  12. Put the radiator cap on securely, then run the engine again, and check for leaks.
  13. Clean up any spilled engine coolant.
  14. If the Maintenance Minder required replacing the engine coolant, reset the Maintenance Minder (see «MAINTENANCE MINDER™»(/acura/zdx/i-2009-2013/remont/schedule/#maintenance) ), and this procedure is complete. If the Maintenance Minder did not require engine coolant replacement, go to step 15.
  15. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  16. Connect the HDS to the DLC (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/zdx/i-2009-2013/remont/testing-diagnostics/#fuel-and-emissions-systems) ).
  17. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  18. Make sure the HDS communicates with the vehicle and the PCM. If it does not communicate, troubleshoot the DLC circuit (see «PCM POWER AND GROUND CIRCUIT TROUBLESHOOTING»(/acura/zdx/i-2009-2013/remont/testing-diagnostics/#pgm-fi-system) ).
  19. Select GAUGES in the BODY ELECTRICAL with the HDS.
  20. Select ADJUSTMENT in the GAUGES with the HDS.
  21. Select MAINTENANCE MINDER in the ADJUSTMENT with the HDS.
  22. Select RESET in the MAINTENANCE MINDER with the HDS.
  23. Select MAINTENANCE SUB ITEM 5 RESET with the HDS.

Scheme 13

Scheme 13: Thermostat Replacement
Scheme 13: Thermostat Replacement
  1. Drain the engine coolant (see «COOLANT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  2. Remove the intake air duct (see step 2 «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  3. Remove the thermostat cover, then remove the thermostat.
  4. Install the new thermostat with a new rubber seal, then install the thermostat cover.
  5. Install the intake air duct (see step 6 under «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  6. Refill the radiator with engine coolant, and bleed the air from the cooling system (see «COOLANT CHECK»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  7. Clean up any spilled engine coolant.

Scheme 14

Scheme 14: Water Passage Replacement
Scheme 14: Water Passage Replacement
  1. Drain the engine coolant (see «COOLANT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  2. Do the battery removal procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
  3. Remove the intake manifold (see «REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  4. Remove the EGR pipe (see «EGR VALVE REPLACEMENT»(/acura/zdx/i-2009-2013/remont/auxiliary-emission-control-systems/#egr-system) ).
  5. Disconnect the EGR valve connector, the ECT sensor 1 connector, the upper radiator hose, the lower radiator hose, the heater hoses, and the water bypass hoses from the water passage.
  6. Remove the water passage and related parts.
  7. Install the water passage in the reverse order of removal.
  8. Install the EGR pipe (see «EGR VALVE REPLACEMENT»(/acura/zdx/i-2009-2013/remont/auxiliary-emission-control-systems/#egr-system) ).
  9. Install the intake manifold (see «INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  10. Do the battery installation procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
  11. Refill the radiator with engine coolant, and bleed the air from the cooling system (see «COOLANT CHECK»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  12. Clean up any spilled engine coolant.

Scheme 15

Scheme 15: A/C Condenser Fan Shroud Removal
Scheme 15: A/C Condenser Fan Shroud Removal

Scheme 16

Scheme 16
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Scheme 17

Scheme 17
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Scheme 18

Scheme 18
Scheme 18
  1. Disconnect the A/C condenser fan motor connector (A), and remove the harness clamps (B).
  2. Remove the coolant reservoir (C).
  3. Unclamp the ATF cooler hose clamps (A).
  4. Loosen the two bolts (A), then remove the A/C condenser fan shroud assembly (B).
  5. Disassemble the A/C condenser fan shroud assembly.

Scheme 19

Scheme 19: A/C Condenser Fan Shroud Installation
Scheme 19: A/C Condenser Fan Shroud Installation

Scheme 20

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Scheme 21

Scheme 21
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Scheme 22

Scheme 22
Scheme 22
  1. Reassemble the A/C condenser fan shroud assembly.
  2. Install the A/C condenser fan shroud assembly (A), then tighten the bolts (B).
  3. Clamp the ATF cooler hose clamps (A).
  4. Install the coolant reservoir (A).
  5. Connect the A/C condenser fan motor connector (B), and install the harness clamps (C).

Scheme 23

Scheme 23: Radiator Fan Shroud Removal
Scheme 23: Radiator Fan Shroud Removal

Scheme 24

Scheme 24
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Scheme 25

Scheme 25
Scheme 25
  1. Drain the engine coolant (see «COOLANT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  2. Remove the bulkhead cover (see «FRONT BULKHEAD COVER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-bulkhead-cover-replacement) ).
  3. Do the battery removal procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
  4. Remove the battery base (see step 10 under «ENGINE REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-removal) ).
  5. Disconnect the radiator fan motor connector (A), the ECT sensor 2 sub harness connector (B), and the ECT sensor 2 connector (C), then remove the harness clamp (D).
  6. Disconnect the upper radiator hose (E).
  7. Remove the radiator fan shroud assembly (A).
  8. Remove the harness clamp (B) and the wire harness (C).
  9. Disassemble the radiator fan shroud assembly.

Scheme 26

Scheme 26: Radiator Fan Shroud Installation
Scheme 26: Radiator Fan Shroud Installation

Scheme 27

Scheme 27
Scheme 27

Scheme 28

Scheme 28
Scheme 28
  1. Reassemble the radiator fan shroud assembly.
  2. Install the wire harness (A) and the harness clamp (B).
  3. Install the radiator fan shroud assembly (C), then tighten the bolts (D).
  4. Connect the upper radiator hose (A).
  5. Install the harness clamp (B), then connect the ECT sensor 2 connector (C), the ECT sensor 2 sub harness connector (D), and the radiator fan motor connector (E).
  6. Install the battery base (see step 54 under «ENGINE INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-installation) ).
  7. Do the battery installation procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
  8. Install the bulkhead cover (see «FRONT BULKHEAD COVER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-bulkhead-cover-replacement) ).
  9. Fill the radiator with engine coolant, and bleed the air from the cooling system (see «COOLANT CHECK»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  10. Clean up any spilled engine coolant.

Scheme 29

Scheme 29: Radiator Replacement
Scheme 29: Radiator Replacement

Scheme 30

Scheme 30
Scheme 30

Scheme 31

Scheme 31
Scheme 31
  1. Drain the engine coolant (see «COOLANT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  2. Remove the bulkhead cover (see «FRONT BULKHEAD COVER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-bulkhead-cover-replacement) ).
  3. Do the battery removal procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
  4. Remove the battery base (see step 10 «ENGINE REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-removal) ).
  5. Remove the A/C condenser fan shroud assembly, (see «A/C CONDENSER FAN SHROUD REMOVAL»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  6. Remove the radiator fan shroud assembly (see «RADIATOR FAN SHROUD REMOVAL»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  7. Disconnect the lower radiator hose (A).
  8. Remove the power steering hose clamp (B).
  9. Disconnect the ATF cooler hoses (C) from the transmission, then plug the ATF cooler hoses and the lines.
  10. Disconnect the ATF cooler hoses (A), then plug the ATF cooler hoses and the lines.
  11. Remove the radiator upper brackets (A), then pull up the radiator (B).
  12. Remove the other parts from the radiator.
  13. Install the radiator in the reverse order of removal. Make sure the upper and lower cushions are set securely.
  14. Install the battery base (see step 54 under «ENGINE INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-installation) ).
  15. Do the battery installation procedure (see «BATTERY REMOVAL AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
  16. Refill the transmission with ATF (see «ATF LEVEL CHECK»(/acura/zdx/i-2009-2013/remont/automatic-trans/#automatic-transmission__atf-level-check) ).
  17. Fill the radiator with engine coolant, and bleed the air from the cooling system (see «COOLANT CHECK»(/acura/zdx/i-2009-2013/remont/cooling-fan/#engine-cooling-system) ).
  18. Clean up any spilled engine coolant.

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