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.
|
|
See also:
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...
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Room Lamp
1.
Disconnect the negative (-) battery terminal.
2.
Detach the lamp lens (A) from the room lamp with a flat-tip ...