Squeeling noise possibly alternator ?

[Tyler1993]

Hi all
I know this has probs been asked about before but eberytime I start my car in the morning generally if there has been moisture in the air I get a squeeling sound coming from the engine bay , it's goes away once it is warm . I am assuming it's the alternator bearing , is there anything that can be done to fix it or do I need a new one thanks .

 

[jonney]

firstly try some silicon spray or dry lube on the drive belts, my old ute had this same issue and it was only a noisy belt at fault. also it could be a dry bearing in a drive pulley that the belt runs on. try the lube first.

 

[Farmer Joe]

I had that problem a few months ago... it was a stuffed clutch on the alternator. the noise was so bad I thought I had engine probs until I ran it without the fan belt and noise had gone!!

 

[Steve-D22]

I have the same problem and getting worse I think. Although once it's warmed up it's gone. I'm replacing the alternator. Silicon spray didn't work.

 

[Navmania]

Have you checked the tensioner bearings. Cheaper to fix if it's the problem.

 

[Tyler1993]

I tried the silicone spray started it this morning no noise hopefully I fixed it cheers fellers

 

[rastas dog]

I've got the same problem was told by nissan it's just dirt in the belt and wears the grooves bigger and it slips around

 

[2greedy]

I developed a squeal and it turns out there's a triangular plate on the the back of the harmonic balancer.

i'm assuming something to do with the crank angle sensor.

Now mine started to squeal as if it was a worn serpentine belt but turns out that plate was bent at one of the points and rubbing against the block, lucky i found it when i did as it had a fair o'l worn mark on the block where it was scraping

I straightened the the bent point of the triangle and squeal gone