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).
|
|
| •
|
From gaskets or bolts
|
|
| •
|
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
|
| •
|
From mechanical seals
|
| •
|
Impeller interference
|
|
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
|
|
| •
|
Check engine coolant.
|
| •
|
Poor coolant quality / Maintenance check
|
|
| •
|
Impeller seperation from the shaft
|
|
| •
|
Replace the water pump.
|
|
Removal and Installation 1. Loosen the drain plug, and then drain the engine coolant. Remove the radiator cap to help drain the coolant faster. 2. Remove the drive belt after turning the drive belt tensioner ...
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