Question about 1999 Pontiac Grand Am GT

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V groove pulley slipped off of harmonic balancer of 1999 Grand Am

While driving my car I heard a strange noise from under the hood. I noticed the battery light came on and started to overheat quickly. After checking under the hood I noticed the serpentine belt was very loose. So loose that nothing was turning-- alternator, water pump, power steering pump. As I was replacing the belt I noticed the harmonic balancer didn't have any grooves on the pulley for the belt to ride. I found the pulley laying under the engine on part of the frame. Is this pulley made to slip easily over the harmonic and if so, why did it come off while driving the car? If I slip it back on, will it come off again? Would I have to replace the whole harmonic balancer? Thanks, Mike

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After checking around, I decided to replace the harmonic balancer. I had a repair shop fix it for me and I think they over charged for the part. But, at least I'm on the road again. This Grand Am has 227,000 miles and still runs pretty good. 

Posted on Jan 17, 2009

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You have to replace the whole balancer

Posted on Jan 15, 2009


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Spraying WD-40 on the source of the squeal may quiet the sound - but not solve the problem that is causing it. By simply masking the problem with WD-40 instead of fixing it - you run the risk of the squealing part failing catastrophically - probably at the least desirable place and time.

For your own safety and convenience, have this problem checked and repaired properly.

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