Question about 1997 Buick Riviera

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I have a noise coming from (what I think was the S/C). I found out that it was the coupler. I replaced the coupler, reassembled and I still have the noise. I then went and replaced the tension pulley(s)and idlers. Still have the same noise. I hear a loud click when I start the car and when I turn the car off. This all goes away when I give it gas. I am at a loss. any idea? Thanks Sickriv. Ps. its a 95 124,000 3800

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It is probably the supercharger coupling located inside the supercharger. It is a plastic disk with several holes. Half of the holes match the compressor shaft on the supercharger compressor the other half are on the drive for the supercharger that has the serpentine belt driving the supercharger. The holes wear oblong the make alot of noise at idle. Under acceleration the noise goes away since this torque has caused rotation into the far end of the oblong holes. Not a major problem but it sounds really bad at an idle.

Posted on Sep 07, 2009

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Have you tried checking the traction control module if its a clicking noise and you step on the break it goes away and comes back after a while then you need to check the abs plugs and the bake pads

Posted on Aug 29, 2009

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Its sound like one of those prolbem that you will have to run it un till it breakes.if it dusent bother your car wile it run i would not worry .

Posted on Aug 02, 2009

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I have a rattling sound coming from the coupler. The motor seems to have a loping or missing to it too. Would the coupler going bad cause this?


are you sure it is not the iac valve you are hearing. this could cause a miss also and make a noise. If it is the coupling , it is a fast fix. If the coupling is bad enough it could cause some problems. You know the coupling itself can be found on E-bay for under 40.00. Then 12 oz. of special charger oil and a hour of time to replace. Have you checked the OIL? To replace the coupling , remove the belts , I think about 6 bolts , and pull the nose off to access the coupling. First try and remove the oil. A spray nozzle from any bottle will fit in the fill hole to squirt out the oil to a bottle. After the oil is out , the bolts(allen head I think) are removed ,pry off the cover . the coupling will be right there Put it back in reverse with new oil and torqe the bolts back , belts and you are ready to go. Since the coupling needs replacing anyway do it and then check the running of your car. I am told the dealer does not sell just the coupling so you have to get after market.

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http://www.zzperformance.com/grand_prix/products1.php?id=155&catid=106
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