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:
Description
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and
is installed on the surge tank. It senses absolute pressure of the surge tank
and transfers the analog signal proportional to the pressure to the ECM. By
using this signal, the ECM calcul ...
Inspection
1.
Turn ignition switch OFF.
2.
Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
3.
Disconnect the solenoid valve connector (A).
...
Water pump Components and components location
Thermostat Components and components location