91 Astra 1.4i Merit - NormanB
Hi

This beast has developed what can only be described as a screeeeeching noise mainly at low engine revs which goes once on the move and engine rpm> 2000 .

It sounds alternator vicinity ish - is it safe to run with alternator drive belt removed (apart from obvious danger of discharging the battery) for fault finding purposes.

If it is alternator bearings which I suspect is this a feasible DIY option?

Cheers
NormanB
91 Astra 1.4i Merit - Andrew Moorey (Tune-Up)
No problem with running with the auxiliary belyt off for diag purposes. Dont know about fixing it on a diy basis, I have a local chap who reconditions starters and alternators and will usually fix for £30-£35.
Andrew



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91 Astra 1.4i Merit - NormanB
Andrew - Thank you for the reassurance - I will proceed with the diagnostics.

I would like to follow up on 'the local chap' - is he local to me? (Hampshire)

Thanks
NormanB
91 Astra 1.4i Merit - Andrew Moorey (Tune-Up)
Sorry Norman, my chap is in Crawley, Sussex
Andrew



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91 Astra 1.4i Merit - Another John H
Not just the belt slipping, is it?

Try a drop of water on the belt while it's running, and screeching. It stops, you have a slipping/slack belt.
91 Astra 1.4i Merit - NormanB
AJH

Sorry I did reply to this on Wednesday - but must have fouled up in making the posting.

You were correct - tried the wet belt marlarkey - noise stopped - new belt to be fitted at the weekend.

Thanks to all.

NormanB
91 Astra 1.4i Merit - NormanB
Sorry - did mean to get back earlier.

I fitted new fanbelt which cured the problem.

Also found something else which may have been a factor.

The bolt that secures the pivot for the alternator adjusting strap (the one with rubber bushes/earth strap) positioned behind the rear cambelt cover had wound its way out! It was only the cambelt rear cover that had stopped it from dropping out. It had obviously been poorly installed (by me!!)Not sure if this was contributing but its tight now + new belt and no shrieking.

Thanks to all concerned - this is a great site.
 

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