| TIBURON(GK) >2006 > 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. (See page EMA - 13)
3. | Remove the timing belt. (See page EMA - 13)
4. | Remove the timing belt idler. (See page EMA - 16)
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).
INSTALLATION
WATER PUMP
1. | Install the water pump(A) and a new gasket(B) with the 8bolts.
Tightening torque 15 ~ 22Nm (150 ~ 220kgf.cm, 11 ~ 16lbf.ft)
Bolt | Size | Number
A B C D | 8 × 25 8 × 30 8 × 32 8 × 40 | 4 2 1 1
2. | Install the timing belt idler. (See page EMA - 17)
3. | Install the timing belt. (See page EMA - 17)
4. | Install drive belt.
5. | Fill with engine coolant. (See page EMA - 72)
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 17 ~ 20Nm (170 ~ 200kgf.cm, 12.5 ~ 14lbf.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.