Noise front of engine - belt driven
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Member
Joined: Apr 2003
Posts: 135
Likes: 2
From: Midland, Texas
Car: 92 Camaro RS
Engine: 305
Transmission: 700R4
Noise front of engine - belt driven
Car is a 1992 camaro RS 305 engine. The engine while idleing will make a rattle/scraping noise randomly. If I remove the serpentine belt the noise is gone. I removed the belt a few months ago and the smog pump pulley shaft had slack like bad bearings. I replaced the pump but the noise is still there. The alternator is about 2 years old (quality rebuilt). None of the belt driven accessories feel loose when I try to wobble the pulleys with the belt off. I need some suggestions before something locks down. Thanks.
Joined: Sep 2005
Posts: 27,918
Likes: 2,448
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Noise front of engine - belt driven
Get yourself about a 3' piece of heater hose. Stick it in your ear! (I just LOVE telling people to do that!!!) and probe around with the other end and listen to each device until you find where the noise is coming from.
Joined: Sep 2004
Posts: 2,777
Likes: 7
From: Casselberry, FLA
Car: 88 V6 'bird/89TBI bird/85 T/A
Engine: 2.8/TBI/TPI
Transmission: V8 T-5/700R4 x2
Axle/Gears: 3.42 open/2.73 open/ 3.27 9 bolt
Re: Noise front of engine - belt driven
Also check the belt tensioner pulley if you haven't already. Those and the plain idlers that don't go to anything seem to fail first.
Joined: Sep 2005
Posts: 27,918
Likes: 2,448
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Noise front of engine - belt driven
So.... which rotating thing did you find is making the noise?
Think that one might be the problem?
Think that one might be the problem?
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