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Gearbox Front Pump Bearing; Whirring Noise
Topic Started: Fri Dec 19, 2014 9:05 pm (382 Views)
Gwilym
Part of things
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I have a suspected Front Pump Bearing problem in my auto box. :crying:

How do I find out if this is indeed what is making the mild 'whirring' noise in my gearbox? feckknows

How much would it cost to have it replaced? Is this a big job? feckknows feckknows

Does the front pump bearing use ATF to lubricate itself and, therefore, will an additive reach the bits which are making the whirring noise or are the bearings within it sealed off from fluid?

As you might note from my other posts I've had ATF changed etc.

Thanks in advance for any of your wisdom! :P
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Gwilym
Part of things
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Does anyone know how to tell the Difference between an auto gearbox front pump bearing 'whirr' and the sound of a worn water pump or oil pump? feckknows

I ask because the garage where originally convinced the whirr was an incorrectly tightened cam chain...they were wrong but still charged me for setting the cam chain tension! :rolleyes:

The garage also changed the auxhilliary belt and tensioner assembly I would have thought it logical to run the engine with belt off or slack in order to rule out the water pump?...but they didn't. :rolleyes: :rolleyes:

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Deleted User
Deleted User

The auto parts stores sell stethoscopes with a probe on the end.
You put the ear pieces in your ears, and touch the water pump with the probe, while it's running.
You will hear the bearings moving inside; they should sound like bowling balls rolling.
You can touch the probe to the intake pipes to hear the intake valves; they should sound like someone tapping a wooden table.
Bearings and gears sound like little motors running.
You can explore the sound of every device.
Anything that sounds like screeching or grinding has a problem.
Be careful not to get the probe tangled in the belts; they will jerk the buds out of your ears, wad the stethoscope into a ball, and throw it at you.
eatpopcorn
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eagle3
Therapy Needed
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You could slacken the belt yourself and spin all the pulleys by hand. Anything making any noise should be changed. Could be water pump, alternator, whatever.
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