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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-18-2011, 06:43 AM   #11
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Default supercharger drive issue

Originally Posted by Danthurs View Post
I did a write up on how to do that, it'* in tech info/maint I believe. If you have any questions or run in to trouble, just post it.
I did a little closer inspection. Here'* what I noticed...
Starting with a cold engine, using a stethoscope, I here only a little noise throughout the supercharger. No "rocks". As it begins to warm-up the noise grows and it does sound a little like rocks being knocked around but it'* not clear where it'* coming from. It seems a little more pronounced in the nose. Raising the engine speed, the rattling smoothed-out.

So, does this seem like a coupler or a bearing? Also, is a bad bearing associated with the tensioner bouncing around?
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Old 02-18-2011, 08:03 AM   #12
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Sounds like a bad coupler. Take the belt off and turn the pulley back and forth. If there'* any play, the coupler is bad. If there'* play the tensioner will bounce a bit because the rotors are heavy. Changing the coupler is a some what easy job and laid out in a write up. If your in need of a rebuilt supercharger, just let me know, I have 4 of them.
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