4.2 engine noise

[Chimp871]

evening, took this video on weekend. Thought it was PAS at first but since the electric pump is removed the noise is still coming from the engine.

Any insights?


https://www.youtube.com/watch?v=zYTNfdyBKUI

[FarmyardPants]

I’m gonna go with failed alternator drive shaft bearings. If so, it’s an engine out job to fix.

Maybe get a length of tube and use it as a stethoscope to find where the noise is coming from.

[Chimp871]

... Which is an auxiliary drive shaft that comes through the timing cover?

Would there be oil leaking albeit slowly if this is the case?

[FarmyardPants]

That’s the fella. No oil when mine went. It started as a shrill grating sound at high revs and later became a constant chatter. I took it to APM to have a look and the noise suddenly stopped on the way. When I got there Andy pointed out the alternator drive pulley was flopping about. A couple of days later it was ready for collection - great service!

[Chimp871]

Can you share approx costs?