1994 Supercharger failing? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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 07-24-2003, 09:28 AM   #1
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Default 1994 Supercharger failing?

I've been told by the shop that the bearings are going bad on my supercharger, and would probably need replacing of the entire supercharger. There is definitely a light clanking noise at idle, and i finally got the belt off- and there is a small amount of play in the pulley, but the vanes spin freely, no resistance at least. I'm wondering also how serious it is since the garage/dealer admitted they send teh whole unit in, they don't service superchargers themselves. Makes me think that if it'* only a coupler they might not know the difference between the sound of a bad coupler vs. bad main bearing. I know there'* quite a few */C Guru'* in this group!

Also, in another matter i replaced the PCV yesterday but didn't have a new gasket for it. How critical is it to get a new one? The manual i have said something about a new O-ring too, but i didn't see an O-ring at all on the old PCV.

Thanks! -Brian
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Old 07-24-2003, 11:11 AM   #2
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Coupler call ZZ performance.
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Old 07-24-2003, 11:42 AM   #3
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Quote:
Originally Posted by Brian95Blown
Coupler call ZZ performance.
I agree with Brian95Bliown. I had similar problems and a coupler fixed them all. Here is a link to what it will take to fix it. http://www.bonnevilleclub.com/forum/...&highlight=m62 The whole process is surprisingly easy to do.

Here is a link to the part you need. http://www.zzperformance.com/zzp/pro...sc_coupler.htm
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Old 07-24-2003, 12:38 PM   #4
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Quote:
I agree with Brian95Bliown. I had similar problems and a coupler fixed them all. Here is a link to what it will take to fix it. http://www.bonnevilleclub.com/forum/...&highlight=m62 The whole process is surprisingly easy to do.
I just ordered the coupler from ZZP. The post you referred to mentions also needing gaskets and sealant....but that is for a complete */C overhaul by the looks of it. I know i would still need sealant and */C oil, but will any gaskets be necessary if all i want to do is take the front housing off, not the entire supercharger?

Thanks again, i'm learning quite alot from this webpage!!
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Old 07-24-2003, 12:49 PM   #5
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Quote:
Originally Posted by brnvs
I just ordered the coupler from ZZP. The post you referred to mentions also needing gaskets and sealant....but that is for a complete */C overhaul by the looks of it. I know i would still need sealant and */C oil, but will any gaskets be necessary if all i want to do is take the front housing off, not the entire supercharger?

Thanks again, i'm learning quite alot from this webpage!!
If all you do is to pull the nose cone I believe you get by without all the gaskets. When I did mine I pulled the whole thing and did some other cleanup work to the TB, fuel injectors, etc...while I was in there.

As far as shops go, most won' touch the SC. If they find it needs any work they will want to replace the whole thing rather than service it. $30 for a new coupler and a few hours of elbow grease sounded a lot better to me than $1000+ for a new or rebuilt SC installed. If you need any help with the replacemt just let us know. There are a few of use here that have already done it.
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Old 07-24-2003, 12:55 PM   #6
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If the '94 is like the '92 and '93, it'* easier to remove the whole supercharger than to just remove the nose - the alternator bracket has to be removed (or at least moved out of the way) and that takes a while. And if you remove the shole supercharger, you may need a new supercharger gasket, 2 o-rings for the coolant passages, and a throttle body gasket, as well as the supercharger oil and the sealant for the nose.

Beware that if you only replace the coupler, you may end up with a leaking oil seal like I did...I removed the whole supercharger, replaced the coupler with an OEM coupler, filled it to the correct level with new supercharger oil, and reinstalled the supercharger. The rattling noise was gone, but several weeks later the oil seal began leaking so bad that I removed the supercharger again and replaced the whole unit with a used one...and as luck would have it, that one had a leaking oil seal too.

The only good news from all of this is that I figured out a creative way to replace the oil seal while the supercharger is still mounted on the engine. I did that to both of my bonnies.
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Old 07-24-2003, 11:02 PM   #7
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If you're not mechanically inclined, the dealer can also replace just the nose cone (Still significant $$, $500 vs $2000 to $2500 for a new */C)

I won't complain this time about the dealer wanting to replace the entire */C.
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Old 07-24-2003, 11:03 PM   #8
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And the O-ring is on the bottom of the PCV valve.
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Old 07-25-2003, 08:26 AM   #9
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Fuddyduddy said:
Quote:
And the O-ring is on the bottom of the PCV valve
I was wondering about that. My service manual is general for Oldsmobile/Pontiac, and doesn't cover the supercharger at all that i know of. When i pulled out my old PCV, there was no O-ring at all on it, though the manual seemed to suggest there would be one. I just pulled the valve out of the spring, put the new one in and shoved it back down.....i wonder if there might have been an O-ring sitting in the hole which now is in the engine or something? Either way i suppose i should get a new one. So is it certain that a 1994 SSEi would have one? I suppose it'* supposed to be an airtight seal around the valve......

thanks again!
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Old 07-25-2003, 02:31 PM   #10
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It may have been down in the engine. You may have two of them in there now.
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