A "What the Heck" Noise Fix - Camaro Zone - Camaro Forums and News

Go Back   Camaro Zone - Camaro Forums and News > Camaro & Firebird Tech Forums > 4th Gen (1993-97) Camaro and Firebird Tech

LinkBack Thread Tools
Old 10-26-2013, 01:19 AM   #1
New Member
Feedback Score: 0 reviews
Join Date: Apr 2011
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
A "What the Heck" Noise Fix

So I just fixed one noise on my '93 T/A (fuel pump) when another one pops up. This one is a grinding/squealing type bearing noise from under the hood, and it is somewhat annoyingly intermittent. Between three of us car guys, we can't figure out if it's the alternator, the power steering pump, or the A/C Compressor pulley bearing (with the A/C on or off the noise is the same). We use the long screwdriver method to listen...a long wooden dowel...and a mechanics stethoscope. One guy thinks it's the alternator for sure...then changes his mind that it's the power steering because the noise changes sometimes when you crank the wheel...the next guy is certain it's the power steering...but it might be the A/C pulley...and I'm sure it's the A/C pulley, except that it might be the alternator. So off comes the drive belt. The alternator spins freely with no rough spots or wiggle. The power steering pump spins freely with no rough spots or looseness...but the A/C pulley (which we know is not engaged) will not turn freely on one revolution, but will turn okay on the next revolution...something not right here. I didn't want to break the system apart if possible, so I got the right tools and removed the A/C clutch face plate and the pulley without removing the compressor (kind of tight, but do-able). With the pulley off, it was clear that the bearing was partially frozen and the seal was melted on one side. So off to the local parts store, where I am amazed that they actually have a part in stock that I need...and the bearing is made in "Japan"...and not China! Wow...I feel like I just won the lottery. I come home and press out the old pulley bearing, and press in the new one. It spins perfectly until I start to put it back onto the compressor. When is is about an 1/8 " on, the pulley will not turn. So I wiggle it off...see that it spins in my hand, and then ever so carefully begin to push it back onto the compressor. When it's barely on, the damn thing won't spin anymore...what the heck!...I do this on & off crap several more times with the same result...by now I'm getting real uncomfortable under this freakin' car...and it's dark now, so that everything I drop rolls into the darkest corner of my entire property which wastes more time...so I go to my bench and mic the new bearing. It is .004 smaller on the ID then the old one. Just to be sure I press the old bearing back into the pulley, and push it back onto the compressor. It spins like it did before (still worn out, but it does turn). So back to the parts store...they tell me a 3 day wait for another bearing (who knows if the POS will even work, anyway)...a 3 day wait for a $90 clutch/pulley assembly...or $180 for an in- stock new compressor with clutch/pulley. This is my daughter's car and she needs it for work the next day...so I come home with the new compressor...put everything together, evacuate & charge the system...start up the car, and wall-la...cold air!...and no bad noises...everything's great for about 30 seconds...and then suddenly, without warning...comes the original, sunuvabitchn bearing noise! I can't find a stick of dynamite close by...and I'm too tired to lift my biggest sledge hammer...so I calmly diagnose the noise as the alternator, for sure, and I haul ass back to the parts store before they close...I buy an alternator...and a power steering pump (just in case)...I put on the alternator, and the noise is gone...I stand there for a few moments holding the power steering pump up for the car to see as a challenge...the noise remains gone, and I can finish off my six pack before I go to bed to a happy ending. What spooks me most on this fiasco is that if I had just replaced the alternator in the first place, and not hand-spun the A/C pulley, the noise would have been gone, but the A/C pulley would have soon crapped out and left my kid stranded on some highway...moral of the story?
beltrunner is offline   Reply With Quote
Sponsored Links
Old 10-26-2013, 02:24 AM   #2
CZ Vendor
Feedback Score: 1 reviews
Ercmann's Avatar
Join Date: Nov 2011
Location: Okaloosa, Florida
Posts: 11,270
Thanks: 48
Thanked 653 Times in 595 Posts
Does the a/c have its own belt? If it does and the a/c went out, she would not be stranded. Her car would be lighter without the weight of the a/c belt but would be hot cause the a/c wouldn't be working. Haha.

2001 Camaro SS LS1, M6
SLP Build #1040
"Concert Hall On Wheels"
"It's better to have it and not need it, than to need it and not have it"
10% OFF LIFETIME Site-Wide Discount Code at ErcsAudio, for ALL CZ Members!! Enter Code CZ10LIFE at checkout!
Ercmann is offline   Reply With Quote
Old 10-26-2013, 10:55 AM   #3
Veteran Member
Feedback Score: 0 reviews
Edwardgp's Avatar
Join Date: Oct 2012
Location: Washington
Posts: 2,071
Thanks: 4
Thanked 19 Times in 17 Posts
Could be more than one accessory making noise at different times.
Edwardgp is offline   Reply With Quote

Thread Tools

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 On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
New spark plugs, new "ticking" noise chunky1994 4th Gen (1993-97) Camaro and Firebird Tech 8 01-28-2012 04:28 PM
oil pressure pegged out after starting.. "whirring noise" shaunmccreary 4th Gen (1998-02) Camaro and Firebird Tech 10 10-16-2010 09:46 AM
Headlight fix help "broken nub" Trans Am Man 4th Gen (1993-97) Camaro and Firebird Tech 8 10-01-2010 04:10 PM
Transmission shifts "quick" and has a "jerk" to it. cmw0021 V6 Camaro and Firebird Tech 6 01-15-2010 09:09 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -4. The time now is 02:14 AM.
Powered by vBulletin®
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
Copyright © CamaroZone.com

CamaroZone.com is in no way associated with or endorsed by General Motors or Chevrolet.