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Noisy Alternator Bearing

scam75

scam75

Well-known member
Hi Guys

Not really one for cheap fixes but my alternator bearing has become a bit noisy of late and I am not likely to get round to replacing it for a few weeks.

I sprayed in some WD40 earlier and it quietened it completely for a little while then it started to come back, more WD40 cures it again then it starts to come back etc.

Is there anything anyone can recommend to spray onto it for the time being that will quieten it till I get round to fixing properly? Or indeed any other suggestions that don't involve taking it off!

Cheers

Stuart
 
Any sort of lubricant spay should help it for a bit.

WD40 does not lubricate as it's job is simply to disperse wate, which is what the WD stands for - in fact it will wash oil/grease away and actually make things worse over time so I would suggest you stop spraying it with that.
 
Any form of oil will just wash/centrifuge away so ideally you want to try to get some grease on it. Might be awkward to get it in there. You could try to squeeze it in through a syringe or something like that.
 
What a good suggestion! I shall try some of that for a temp fix, sounds ideal.

Stuart
 
I love the idea of anti-fling grease! Makes you wonder what they really developed it for.
Having used a chainsaw without anti-fling oil you soon realise its advantages.
 
ORIGINAL: GPF

Any sort of lubricant spay should help it for a bit.

WD40 does not lubricate as it's job is simply to disperse wate, which is what the WD stands for - in fact it will wash oil/grease away and actually make things worse over time so I would suggest you stop spraying it with that.
Click to expand...

Entirely correct! After leaving the car for a week with WD40 on the bearing it was noisier than ever today! Oops.

Stuart
 
ORIGINAL: ghost

Motorcycle chain lube. Comes in aerosol. Superb anti-fling properties.
Click to expand...

I got myself some Castrol Chain Wax form Halfords through the week. I let the bearing heat up for a bit and sprayed it in today, could hear a little improvement at first at idle but still noisy when revving. Some more spraying and revving helped another bit. I then turned it off and sprayed some more in and left it for half an hour.

Went back out and was still noisy so sat at 3k revs for 5 mins and it started to quieten down until pretty much gone throughout the rev range.

So it seems to have taken a bit of convincing to get itself in and start working but that's no bad thing as it may stay in there for a while now![:D]

Will check it again tomorrow but so far so good.

Stuart
 
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