Noise sounds like supercharger problem but isn't? - 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.

Reply
 
 
 
Thread Tools Search this Thread
Old 12-18-2005, 12:51 AM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Jan 2002
Location: southern California
Posts: 538
Thanks: 0
Thanked 0 Times in 0 Posts
billha is on a distinguished road
Default Noise sounds like supercharger problem but isn't?

I recently noticed a strange noise on my '92 SSE */c. The engine sounds noisier than usual at idle. The noise sounds like it'* coming from the nose of the supercharger; all other pulleys sound quiet. There'* also a noise during acceleration in 1st and 2nd gear. The upper belt tensioner jumps a bit while the engine is running, too. Just for kicks, I replaced the almost new pulley on that tensioner with another new one, but it made no difference. I also swapped the upper tensioner from my '93 onto the '92, and it jumped also, but neither tensioner jumps when mounted on my '93.

Because I thought the noise was coming from the supercharger nose, I replaced the supercharger with one that I rebuilt the nose on (new bearings, coupler, oil seal, and oil) and to my amazement, the noise is still present and it still sounds like it'* coming from the supercharger nose.

Is it possible that something else is making it sound like the noise is coming from the supercharger nose when it really isn't?

I've recently replaced the harmonic balancer, alternator, all idler and tensoner pulleys (but not the tensioner spring assemblies), power steering pump, and as I said, the supercharger.

I haven't replaced the water pump, ac compressor, or belt tensioner spring assemblies (but as I said, all tensioner pulleys were replaced).

Any wild ideas? Could a belt tensioner spring mechanism cause a noise that sounds like it'* coming from somewhere else? Water Pump? Could it be a problem in the engine?

Thanks!
billha is offline   Reply With Quote
Old 12-19-2005, 11:36 AM   #2
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'd go straight to the belt tensioner personally.. You've replaced everything else and you shouldn't have any "jumping"
BillBoost37 is offline   Reply With Quote
Old 12-20-2005, 03:34 AM   #3
Senior Member
Posts like a Northstar
 
Join Date: Apr 2004
Location: Minneapolis, MN
Posts: 566
Thanks: 0
Thanked 0 Times in 0 Posts
CSFiend is on a distinguished road
Default

Agreed.

Another option is that you have the incorrect belt on, causing the tensioner to bottom out. Check it out and make sure it'* the correct length.
CSFiend is offline   Reply With Quote
Old 12-20-2005, 07:45 PM   #4
Senior Member
Posts like a Turbo
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default sounds familiar

Wow, I have that similar problem, Hey bill would a worn belt make the engine run rough?, I did change all the sensors on my car and still to no vail it seems to run rough at idle with the belt tensioner making a rattle, (Brand new Belt tensioner too)
bigbadbonneville is offline   Reply With Quote
Old 12-21-2005, 10:54 AM   #5
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Jan 2002
Location: southern California
Posts: 538
Thanks: 0
Thanked 0 Times in 0 Posts
billha is on a distinguished road
Default

The belt is the right size, and it'* only about 6 months old. The mark on the side of the tensioner is within the marked limits and isn't near either side marker.

I doubt it'* the belt tensioner spring because I just swapped the tensioner with the one from my '93, and it'* still jumping around a bit sporadically.
billha is offline   Reply With Quote
Old 12-22-2005, 11:05 PM   #6
Senior Member
Posts like a Turbo
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default

Quote:
Originally Posted by billha
The belt is the right size, and it'* only about 6 months old. The mark on the side of the tensioner is within the marked limits and isn't near either side marker.

I doubt it'* the belt tensioner spring because I just swapped the tensioner with the one from my '93, and it'* still jumping around a bit sporadically.
uhmm, I wonder now if maybe some vacumm leaks are occurring, because I have replaced every sensor on the car brand new and not remans. cant seem to find any leaks but if there is a better way in finding a vacumm leaks please let me know. - NO Codes on the scanner nor SES light on. - uhmm?
bigbadbonneville is offline   Reply With Quote
Old 12-23-2005, 11:05 AM   #7
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Jan 2002
Location: southern California
Posts: 538
Thanks: 0
Thanked 0 Times in 0 Posts
billha is on a distinguished road
Default

[quote="bigbadbonneville"]
Quote:
Originally Posted by billha
uhmm, I wonder now if maybe some vacumm leaks are occurring, because I have replaced every sensor on the car brand new and not remans. cant seem to find any leaks but if there is a better way in finding a vacumm leaks please let me know. - NO Codes on the scanner nor SES light on. - uhmm?
Nope, no SES light or error codes, and it always starts easily, runs strong, gets decent gas mileage, and has never stalled. I've hunted for vacuum leaks on multiple occasions and I've replaced some of the vacuum fittings and hoses for good measure, but I've never found anything that appeared to be leaking, and the last time I hunted for a leak, I used a vacuum gun.
billha is offline   Reply With Quote
Old 01-25-2006, 02:37 AM   #8
Junior Member
Posts like a Ricer Type-R
 
Join Date: Jan 2004
Location: Armstrong, BC, Canada
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
MunRon is on a distinguished road
Default

Sounds like the infamous and never popular harmonic balancer. Take the belts off and try turning it. If it moves at all without turning the engine its your problem. Brace yourself for the price of a replacement one.
MunRon is offline   Reply With Quote
Old 01-25-2006, 09:48 AM   #9
Senior Member
True Car Nut
 
Join Date: Jan 2005
Location: Montevideo, MN MWBF '05, '06, '07 WCBF '06 '07 survivor
Posts: 3,882
Thanks: 0
Thanked 0 Times in 0 Posts
sonoma_zr2 is on a distinguished road
Default

I thought my coupler was going, it was the water pump. Go figure
sonoma_zr2 is offline   Reply With Quote
Old 01-25-2006, 09:55 AM   #10
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Bill...pull the tension off the belts and check all the pulleys and wp etc. Anything feel odd?
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
A loud noise... sounds like death if it had a sound phoenix 2000-2005 6 06-13-2007 09:17 AM
Noise at specific speeds, sounds like tire noise but isn't? billha 1992-1999 13 04-25-2006 02:13 AM
supercharger vacuum leak really isn't? billha Forced Induction 3 05-17-2005 12:34 PM
98 Bonnie front right sounds like tire noise?wheel bearing cvc 1992-1999 7 04-14-2005 03:18 AM
I like the way the 205hp sound but 240 sounds lovely pontiacfan1978 1992-1999 70 10-15-2002 01:57 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:19 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.