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Diagnosing noise - Alternator/PS pump


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Going to pop the PS/alternator belt off to narrow down a source of noise. Is it best to disconnect the 3 wire plug from the alternator when running the engine without this belt or just leave it all connected?

 

Thanks.

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In for results ? Did you find the noise ?

 

Not yet. It's loudest on start as pressure builds then settles down quite a bit. Groans a bit on turning the wheeel. The PS fluid is quite old and I have a new o-ring for the inlet tube bit so when I get a chance I'll change the ring and exchange the fluid. I know that o-ring is prone to making noises when it's failed.

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