| TIBURON(GK) >2007 > G 2.7 DOHC > Engine Mechanical System > Cooling System>Repair procedures |

REMOVAL
WATER PUMP
1. | Drain the engine coolant.
System is under high pressure when the engine is hot. To avoid danger of releasing scalding engine coolant, remove the cap only when the engine is cool.
2. | Remove drive belts.
3. | Remove the timing belt.
4. | Remove the timing belt idler.
5. | Remove the water pump. Remove the water pump(A) and gasket(B).
THERMOSTAT
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.
1. | Remove the engine cover.
2. | Drain engine coolant so its level is below thermostat.
3. | Remove the lower hose.
4. | Remove water inlet(A) and thermostat(B).
RADIATOR
1. | Remove the side cover(A, B, C) and the engine cover(D).
2. | Disconnect the battery terminal and the battery.
3. | Remove the radiator cap to speed draining.
4. | Remove the radiator drain plug and drain engine coolant.
5. | Remove the auto transaxle fluid hoses (A).
6. | Remove the auto transaxle fluid hoses (A). [LH] [RH]
7. | Remove the radiator mounting bracket (A,B).
8. | Remove the radiator mounting bracket (A,B).
9. | Remove the radiator assembly from engine room.
10. | To install, reverse the removal procedure.
INSTALLATION
WATER PUMP
1. | Install the water pump(A) and a new gasket(B) with the 8bolts.
Tightening torque 14.7 ~ 21.6Nm (1.5 ~ 2.2kgf.m, 10.8 ~ 15.9lb-ft)
Bolt | Size | Number
A B C D | 8 × 25 8 × 20 8 × 32 8 × 40 | 4 2 1 1
2. | Install the timing belt idler.
3. | Install the timing belt.
4. | Install drive belt.
5. | Fill with engine coolant.
6. | Start engine and check for leaks.
7. | Recheck engine coolant level.
THERMOSTAT
1. | Place thermostat in thermostat housing.
(1) | Install the thermostat with the jiggle valve upward.
(2) | Install a new to the thermostat(B).
2. | Install water inlet(A).
Tightening torque 16.7 ~ 19.6Nm (1.7 ~ 2.0kgf.m, 12.3 ~ 14.5lb-ft)
3. | Install the lower hose.
4. | Fill with engine coolant.
5. | Start engine and check for leaks.
INSPECTION
WATER PUMP
1. | Check each part for cracks, damage or wear, and replace the coolant pump assembly if necessary.
2. | Check the bearing for damage, abnormal noise and sluggish rotation, and replace the coolant pump assembly if necessary.
3. | Check for coolant leakage. If coolant leaks from hole, the seal is defective. Replace the coolant pump assembly
A small amount of "weeping" from the bleed hole is normal.
THERMOSTAT
1. | Immerse the thermostat in water and gradually heat the water.
2. | Check the valve opening temperature.
Valve opening temperature : 82°C (177°F) Full opening temperature : 95°C (205°F)
If the valve opening temperature is not as specified, replace the thermostat.
3. | Check the valve lift.
Valve lift : 10mm(0.4in.) or more at 95°C (205°F)
If the valve lift is not as specified, replace the thermostat.
INSPECTION
WATER PUMP
1. | Check each part for cracks, damage or wear, and replace the coolant pump assembly if necessary.
2. | Check the bearing for damage, abnormal noise and sluggish rotation, and replace the coolant pump assembly if necessary.
3. | Check for coolant leakage. If coolant leaks from hole, the seal is defective. Replace the coolant pump assembly
A small amount of "weeping" from the bleed hole is normal.
THERMOSTAT
1. | Immerse the thermostat in water and gradually heat the water.
2. | Check the valve opening temperature.
Valve opening temperature : 82°C (177°F) Full opening temperature : 95°C (205°F)
If the valve opening temperature is not as specified, replace the thermostat.
3. | Check the valve lift.
Valve lift : 10mm(0.4in.) or more at 95°C (205°F)
If the valve lift is not as specified, replace the thermostat.