Contents Section: Cooling System (mechanical) All sections

Cooling System - g3.5 DOHC Hyundai Santa Fe II рестайлинг

Cooling System (mechanical) 27 illustrations ~1360 words

Replacement And Air Bleeding

CAUTIONNever remove the radiator cap when the engine is hot. Serious scalding could be caused by hot fluid under high pressure escaping from the radiator.

Note. When pouring engine coolant, be sure to shut the relay box lid and not to let coolant spill on the electrical parts or the paint. If any coolant spills, rinse it off immediately.

  1. Make sure the engine and radiator are cool to the touch.
  2. Remove the radiator cap.
  3. Loosen the drain plug, and drain the coolant.
  4. Tighten the radiator drain plug securely.
  5. Remove, drain and reinstall the reservoir. Fill the tank halfway to the MAX mark with water, then up to the MAX mark with antifreeze.
  6. Fill the radiator with water through the radiator cap and tighten the cap. NOTE: To most effectively bleed the air, pour the water slowly and press on the upper/lower radiator hoses.
  7. Start the engine and allow to come to normal operating temperature. Wait for the cooling fans to turn on several times. Accelerate the engine to aid in purging trapped air. Shut engine off.
  8. Wait until the engine is cool.
  9. Repeat steps 1 to 8 until the drained water runs clear.
  10. Fill fluid mixture with coolant and water (5 : 5) (Tropical region - 4:6) slowly through the radiator cap. Push the upper/lower hoses of the radiator so as bleed air easily. NOTE: Use only genuine antifreeze/coolant. For best corrosion protection, the coolant concentration must be maintained year-round at 35% minimum. Coolant concentrations less than 35% may not provide sufficient protection against corrosion or freezing. Coolant concentrations greater then 60% will impair cooling efficiency and are not recommended. CAUTION: Do not mix different brands of antifreeze/coolants. Do not use additional rust inhibitors or antirust products; they may not be compatible with the coolant.
  11. Start the engine and run coolant circulates.
  12. When the cooling fan operates and coolant circulates, refill coolant through the radiator cap.
  13. Repeat step. 11 until the cooling fan 3 ~ 5 times and bleed air sufficiently out of the cooling system.
  14. Install the radiator cap and fill the reservoir tank to the "MAX" line with coolant.
  15. Run the vehicle under idle until the cooling fan operates 2 ~ 3 times.
  16. Stop the engine and wait coolant gets cool.
  17. Repeat 10 to 15 until the coolant level doesn't fall any more, bleed air out of the cooling system. NOTE: As it is to bleed air out to the cooling system and refill coolant when coolant gets cool completely, recheck the coolant level in the reservoir tank for 2 ~ 3 days after replacing coolant. Coolant capacity : 8.3L (8.8Us.qts, 7.3 lmp.qts)

Scheme 17

Scheme 17: Components

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Scheme 18: Removal

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Scheme 23
  1. Disconnect the battery negative terminal.
  2. Remove the air cleaner assembly.
  3. Remove the battery and battery tray.
  4. Remove the under cover.
  5. Loosen the drain plug (A), and drain the coolant. Remove the radiator cap to speed draining.
  6. Remove the radiator upper hose (A), lower hose (B) and then disconnect the fan motor connector (C).
  7. Disconnect the ATF cooler hoses (A/T only). (Refer to «REMOVAL»(/hyundai/santa-fe/ii-2010-2012/remont/automatic-trans/#automatic-transaxle-system-a6lf2-g35-dohc) .)
  8. Remove the front bumper. (Refer to «FRONT BUMPER»(/hyundai/santa-fe/ii-2010-2012/remont/exterior-body-panels/#front-rear-bumpers) .)
  9. Disconnect the over flow hose (A) from the radiator.
  10. Remove the upper cover (A).
  11. Remove the guard (B) and radiator mounting bracket (C). Tightening torque: 8.8 ~ 10.8 N.m (0.9 ~ 1.1 kgf.m, 6.5 ~ 7.9 lb-ft)
  12. Remove the A/C high pressure pipe bracket mounting bracket (A). Tightening torque : 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
  13. Separate the condenser from the radiator and then remove the upper cover and cooling fan assembly. Tightening torque: 8.8 ~ 10.8 N.m (0.9 ~ 1.1 kgf.m, 6.5 ~ 7.9 lb-ft)
  14. Pull radiator upper from engine room.
  15. Installation is in the reverse order of removal.
  16. Fill the radiator with coolant and check for leaks. NOTE: Bleed air from the cooling system. Start engine and let it run until it warms up. (Until the radiator fan operates 3 or 4 times.) Turn off engine. Check the coolant level and add coolant if needed. This will allow trapped air to be removed from the cooling system. Put the radiator cap on tightly, then run engine again and check for leaks.

Scheme 24

Scheme 24: Radiator Cap Testing
  1. Remove the radiator cap, wet its seal with engine coolant, and then install it on a pressure tester.
  2. Apply a pressure of 93.16 ~ 122.58kpa (0.95 ~ 1.25kg/cm 2 , 13.51 ~ 17.78psi).
  3. Check for a drop in pressure.
  4. If the pressure drops, replace the cap.

Scheme 25

Scheme 25: Radiator Leakage Test
  1. Wait until engine is cool, then carefully remove the radiator cap and fill the radiator with engine coolant, then install it on the pressure tester.
  2. Apply a pressure tester to the radiator and apply a pressure of 93.16 ~ 122.58kpa (0.95 ~ 1.25kg/cm 2 , 13.51 ~ 17.78psi).
  3. Inspect for engine coolant leaks and a drop in pressure.
  4. Remove the tester and reinstall the radiator cap. NOTE: Check for engine oil in the coolant and/or coolant in the engine oil.

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Scheme 26: Components

Scheme 27

Scheme 27: Water Pump

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Scheme 29
  1. Loosen the drain plug, and drain the engine coolant. CAUTION: Never remove the radiator cap when the engine is hot. Serious scalding could be caused by hot fluid under high pressure escaping from the radiator.
  2. Remove the drive belt (A).
  3. Remove the water pump pulley (A).
  4. Remove the water pump (A) and gasket (B).

Water Temperature Control Assembly

CAUTIONTo avoid damage, unplug the wiring connectors carefully while holding the connector portion.

Note. Mark all wiring and hoses to avoid misconnection.

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Scheme 33
  1. Loosen the drain plug and drain the engine coolant.
  2. Remove the radiator upper hose (A) and lower hose (B).
  3. Disconnect the WTS & gauge unit connector (A)
  4. Disconnect the throttle body coolant hoses (A) and the heater hoses (B).
  5. Disconnect the oil cooler hoses (A).
  6. Remove the water temperature control assembly (B).

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Scheme 34: Water Pump

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  1. Install the water pump (A) with the new gasket (B). NOTE: Clean the contact face before assembly. Always use a new bolt (C) and gaskets (B). Tightening torque G (4) : 21.6 ~ 23.5N.m (2.2 ~ 2.4kgf.m, 15.9 ~ 17.4lb-ft) H (1) : 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft) I (1) : 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft) J (1) : 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft) K (4) : 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft) L (1): 21.6 ~ 26.5N.m (2.2 ~ 2.7kgf.m, 15.9 ~ 19.5lb-ft)- New bolt
  2. Install the water pump pulley (A). Tightening torque : 7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)
  3. Install the drive belt (A).
  4. Fill the radiator with coolant and check for leaks.

Scheme 38

Scheme 38: Water Temperature Control Assembly

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Scheme 41
  1. Install the water temperature control assembly (B) and then, connect the oil cooler hoses (A). Tightening torque : 19.6 ~ 23.5N.m (2.0 ~ 2.4kgf.m, 14.5 ~ 17.4lb-ft)
  2. Connect the WTS & gauge unit connector (A).
  3. Connect the throttle body coolant hoses (A) and the heater hoses (B).
  4. Install the radiator upper hose (A) and the lower hose (B). NOTE: Refill engine coolant. Refill radiator and reservoir tank with engine coolant. Bleed air from the cooling system. Start engine and let it run until it warms up. (Until the radiator fan operates 3 or 4 times.) Turn Off the engine. Check the level in the radiator, add coolant if needed. This will allow trapped air to be removed from the cooling system. Put radiator cap on tightly, then run the engine again and check for leaks. Clean the battery posts and cable terminals with sandpaper assemble them, then apply grease to prevent corrosion.

Troubleshooting

SymptomsPossible CausesRemedy
Coolant leakageFrom the bleed hole of the water pumpVisually checkCheck leaks after about ten-minute warming up.If coolant still leaks, replace a water pump.
If leakage stops, reuse the water pump (Do not replace the pump with a new one).
From gaskets or boltsCheck the tightening of the water pump mounting bolts.Retighten the mounting bolts.
Check damage of gaskets or inflow of dust.Replace the gasket and clean dust off.
From outer surface of water pumpCheck the material or any cracks of the water pump.Poor material. If any crack found, replace the water pump.
NoiseFrom bearings From mechanical seals Impeller interferenceInspection with a stethoscopeAfter starting the engine, check noise with a stethoscope.If there is no noise, reuse the water pump (do not replace it).
If there is any noise from the water pump, remove the drive belt and recheck.
Inspection after removing a drive beltAfter removing a water pump and a drive belt, check noise again.If there is noise, reuse the water pump. Check other drive line parts.
If there is no noise, replace the water pump with a new one.
Inspection after removing a water pumpAfter removing a water pump and a drive belt, check noise again.If there is any interference between them, replace the water pump with a new one.
OverheatingDamaged impeller Loosened impellerLoosened impellerCorrosion of the impeller wingCheck engine coolant. Poor coolant quality/Maintenance check
Impeller separation from the shaftReplace the water pump.

TROUBLESHOOTING

Removal

Note. Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat.

Scheme 42

Scheme 42: Removal
  1. Drain engine coolant so its level is below thermostat.
  2. Remove the water inlet fitting (A) and the thermostat (B).

Scheme 43

Scheme 43: Installation
  1. Place the thermostat in thermostat housing. Install the thermostat with the jiggle valve upward. Install a new thermostat (B).
  2. Install the water inlet fitting (A). Tightening torque : 16.7 ~ 19.6N.m (1.7 ~ 2.0kgf.m, 12.3 ~ 14.5lb-ft)
  3. Fill with engine coolant.
  4. Start engine and check for leaks.
SymptomsPossible CausesRemedy
Coolant leakageFrom the thermostat gasketCheck the mounting boltsCheck the torque of the mounting boltsRetighten the bolts and check leakage again.
Check the gasket for damageCheck gasket or seal for damageReplace gaskets and reuse the thermostat.
Cooled excessivelyLow heater performance (cool air blows out) Thermogauge indicates 'LOW'Visually check after removing the radiator cap.Insufficient coolant or leakage.After refilling coolant, recheck.
GDS check & Starting engineCheck DTCs Check connection of the fan clutch or the fan motor. * If the fan clutch is always connected, there will be a noise at idle.Check the engine coolant sensor, wiring and connectors. Replace the components.
Remove the thermostat and inspectCheck if there are dusts or chips in the thermostat valve. Check adherence of the thermostat.Clean the thermostat valve and reuse the thermostat. Replace the thermostat, if it doesn't work properly.
Heated excessivelyEngine overheated Thermogauge indicates 'HI'Visually check after removing the radiator cap.Insufficient coolant or leakage. * Be careful when removing a radiator cap of the overheated vehicle. Check air in cooling system.After refilling coolant, recheck. Check the cylinder head gaskets for damage and the tightening torque of the mounting bolts.
GDS check & Starting engineCheck DTCs Check the fan motor performance as temperature varies. Check if the fan clutch slips. Check the water pump adherence or impeller damaged.Check the engine coolant sensor, wiring and connectors. Check the fan motor, the relay and the connector. Replace the fan clutch, if it doesn't work properly. Replace the water pump, if it doesn't work properly.
Immerse the thermostat in boiling water and inspection.After removing the thermostat, check it works properly. * Check the thermostat opens at the valve opening temperature.Replace the thermostat, if it doesn't work properly.

TROUBLESHOOTING

See also:
REMOVAL
FRONT BUMPER