Weird noise after changing SC pulley...? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-04-2006, 09:10 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: The Big "OH"
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
mikey383 is on a distinguished road
Default Weird noise after changing SC pulley...?

I took my car into the dealer today to have them swap my pulleys. So, when I get it back, the snout makes a weird noise now. Not so much of a screech, but a chirping type noise, kinda like a bird call. I checked the oil, and it'* about 1/4" below the bottom of the fill hole. They had to take the snout off to get the old pulley off, it was stuck on there pretty darn good, so maybe the guy didn't put enough SC oil back in? Or did he mess up a bearing in the process? I did notice some metal shavings on the snout, wiped them off, and so far don't notice any more. I've only drove it for maybe 20 miles so far, so maybe the oil just needs to work itself back into the bearings? Or is there something else I'm missing here?
mikey383 is offline   Reply With Quote
Old 01-04-2006, 09:32 PM   #2
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default Re: Weird noise after changing SC pulley...?

Quote:
Originally Posted by mikey383
I took my car into the dealer today to have them swap my pulleys. So, when I get it back, the snout makes a weird noise now. Not so much of a screech, but a chirping type noise, kinda like a bird call. I checked the oil, and it'* about 1/4" below the bottom of the fill hole. They had to take the snout off to get the old pulley off, it was stuck on there pretty darn good, so maybe the guy didn't put enough SC oil back in? Or did he mess up a bearing in the process? I did notice some metal shavings on the snout, wiped them off, and so far don't notice any more. I've only drove it for maybe 20 miles so far, so maybe the oil just needs to work itself back into the bearings? Or is there something else I'm missing here?

the snout should not have to come off.....all you needed was a pulley puller....i dont think the dealer knew what they were doing
1993 SLE is offline   Reply With Quote
Old 01-04-2006, 09:34 PM   #3
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

If you take off the belt, can you get the shaft to wobble?
J Wikoff is offline   Reply With Quote
Old 01-04-2006, 09:48 PM   #4
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: The Big "OH"
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
mikey383 is on a distinguished road
Default

Quote:
Originally Posted by J Wikoff
If you take off the belt, can you get the shaft to wobble?
No wobble, just some minimal play from the coupler.

Quote:
Originally Posted by 1993 SLE
the snout should not have to come off.....all you needed was a pulley puller....i dont think the dealer knew what they were doing
The pulley was on there so tight that it started bending with the puller, so they took the snout off and stuck it in a press.
mikey383 is offline   Reply With Quote
Old 01-04-2006, 09:54 PM   #5
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Chirping is belt noise. They either didn't install the pulley fully, and you'll start seeing belt wear on one edge of the pulley and belt, or the pulley just needs to 'break in' it'* anodizing.

OR you need an oversized idler pulley or shorter belt due to belt slip.
willwren is offline   Reply With Quote
Old 01-04-2006, 09:54 PM   #6
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

They didn't hold the snout and pull on the pulley, did they? The puller must use the shaft for leverage, not the snout housing.
J Wikoff is offline   Reply With Quote
Old 01-04-2006, 09:57 PM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

I smell a VERY large SNAFU, FUBAR, BOHICA here.

And they probably won't accept liability. A shame the coupler wasn't replaced while the snout was off, and a shame they didn't fully top off the snout. Unless it'* leaking.
willwren is offline   Reply With Quote
Old 01-04-2006, 10:12 PM   #8
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: The Big "OH"
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
mikey383 is on a distinguished road
Default

I got the oversized tensioner. It only seems to make the noise the most at around 2k+ RPMs.

I tried to get them to change the coupler while the snout was off, but they said they don't carry the internal parts. Snout isn't leaking oil anywhere that I've noticed. The pulley is in the same spot that the old one was, front of the pulley even with the shaft. I'll drive it for a day or so, and if it doesn't cease, I'll have to look into it further or take it back to them.

On a side note, they did make me sign a waiver saying they aren't liable for any damages arising from this modification...slinging a piston out of the oil pan, etc. But they can still be liable for any damages done while installing the pulley.
mikey383 is offline   Reply With Quote
Old 01-04-2006, 11:28 PM   #9
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: The Big "OH"
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
mikey383 is on a distinguished road
Default

Well, I noticed that the noise goes away under moderate to heavy acceleration, so I'm thinking it'* probably just the anodizing on the pulley needing broke-in. If it doesn't quit in a day or so, and I notice more metal on the snout, then I'll be worried.

BTW, I'm not hearing any knock, do you think I'm okay with all the mods I've done so far, or could I just not be hearing it? Is a CAI really neccesary, or will a gutted airbox suffice? I'm running 93 - 94 octane with every re-fuel, and I'll be changing the exhaust in a few weeks. Any other advice?
mikey383 is offline   Reply With Quote
Old 01-04-2006, 11:40 PM   #10
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Advice? Scan now, then scan again in late spring (hotter weather). My personal opinion is that you shouldn't pulley with even a gutted airbox. It'* a rule of thumb after changing to a smaller pulley to scan.

What type of belt are you running? Have you considered changing it to a Gatorback? You won't see metal shavings. You'll see BELT shavings. Black dust over time with slip/shreddage.
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Changing supercharger pulley Danthurs Performance 0 01-21-2009 11:22 AM
weird weird and really weird 3064datazz 1992-1999 42 07-19-2007 02:03 PM
Changing the supercharger pulley? Toms00ssei 2000-2005 6 09-30-2004 11:13 PM
Weird clunk when first going in reverse after cold maxpower9004 1992-1999 6 06-21-2004 08:58 PM
Weird noise...from pulley's??? givemebreak General GM Chat 12 02-26-2004 11:41 PM


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 11:36 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.