Symptoms
|
Possible Causes
|
Remedy
|
Coolant leakage
|
| •
|
From the bleed hole of the water pump
|
|
Visually check
|
| •
|
Check 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).
|
|
|
|
| •
|
Check 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 pump
|
|
| •
|
Check the material or any cracks of the water pump.
|
|
| •
|
Poor material. If any crack found, replace the water pump.
|
|
Noise
|
|
Inspection with a stethoscope
|
| •
|
After 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 belt
|
| •
|
After 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 pump
|
| •
|
After 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.
|
|
Overheating
|
|
Loosened impeller
|
| •
|
Corrosion of the impeller wing
|
|
| •
|
Poor coolant quality / Maintenance check
|
|
| •
|
Impeller seperation from the shaft
|
|
| •
|
Replace the water pump.
|
|
Other information:
Removal and Installation
•
Be careful not to damage the parts located under the vehicle
(floor under cover, fuel filter, fuel tank and canister) when
raising the vehicle using the lift...
Removal
1.
Prior to replacing the 4WD ECU, check the 4WD ECU's clutch learing with
the diagnostic tool.
(Refer to 4WD Control System - "Repair Procedures")
2.
Turn OFF ignition switch and the disconnect the negative (-) battery
cable...
Water pump. Repair procedures
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