Squealing Sound underhood 05
Thread Starter
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
Squealing Sound underhood 05
Just today I started to hear a squealing sound from under the hood .. It is DEFINITELY coming from the belt.. It is at an idle, could it be just an idler pulley ? What else under there could cause this..
I shut it off & sprayed a little WD40 on the Alternator and idler pulleys.. no help..
Any suggestions.. Could the bolt that comes lose on the pulley be causing this... It is just a constant squeal..
I just need some suggestions on where else I should look... and what to look for ? Its got me stumped..
thanks...
I shut it off & sprayed a little WD40 on the Alternator and idler pulleys.. no help..
Any suggestions.. Could the bolt that comes lose on the pulley be causing this... It is just a constant squeal..
I just need some suggestions on where else I should look... and what to look for ? Its got me stumped..
thanks...
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Be careful John, it could be the crank pulley bolt starting to back out, it was an issue on some of the '05s. Even though you're out of warranty there might be a technical service bulletin (TSB) on it that would allow the dealership to fix it for free.
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
It might be something else altogether but I'd check the crank-pulley and inspect the belts with the engine off. Is the pulley loose at all or is there any fraying to the belts? If it looks good fire it up and check that the belts are running true and the harmonic balancer isn't walking. If in doubt trailer it to the dealership and have it checked. If it is the harmonic balancer you don't want it to 'go' and cause consequential damage.
Thread Starter
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
I trust them impeccably.. I'm supposed to race Sat in the CC.. and hope I can get it in to them before then...
I can also take it to a local shop who is also a very trusted place.. I might have the local shop check it first.. if no luck I'll go the Chevy,,,
Just hope to get it corrected BEFORE Sat..... Thanks...
Thread Starter
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
It might be something else altogether but I'd check the crank-pulley and inspect the belts with the engine off. Is the pulley loose at all or is there any fraying to the belts? If it looks good fire it up and check that the belts are running true and the harmonic balancer isn't walking. If in doubt trailer it to the dealership and have it checked. If it is the harmonic balancer you don't want it to 'go' and cause consequential damage.
I did all of what you said above.. none of the pulleys are wobbly.. the belt is tight and NO fraying... while running everything looks to be straight & true (belt & all pulleys i.e. idler, alternator, the main pulley all are tight.. I sprayed them with WD40 no luck...
I'll take to to the local shop first as its only 3 miles away, & he "Knows his stuff" (an old Comp Racer) if he don't find anything I'll go to the dealership I bought 3 cars before this one...
thanks for the suggestions...
Thread Starter
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
Checked it.. I had the AC off when I ran the motor...and still get the squeal.. If I put it in gear and hold the break and bring the RPM up to 1200 it will go away.. I've done WD40 again.. no luck. & I cant pinpoint exactly which pulley its coming from...
Melting Slicks
Joined: Sep 2005
Posts: 2,670
Likes: 134
From: merritt island fl
C1 of Year Finalist (stock) 2019
2016 C1 of the Year Finalist
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If you loosen each belt (no need to remove them) you can turn the idler pulleys by hand. Check for smooth turning with no "grittiness". Also check the alternator.
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Drifting
Joined: Jan 2009
Posts: 1,646
Likes: 2
I had a chirping, like I had a bird under my hood, turned out to be the pulley tensioner bolt.. of course I found this out after the bolt snapped off and was stuck in the engine! Had bolt drilled out, got new tensioner pulley,, zero chirping now!
Drifting
Joined: Sep 2007
Posts: 1,283
Likes: 7
From: Hurst (Fort Worth area) Texas
St. Jude Donor '09
Exactly what are you squirting WD40 on? That stuff is certainly no magin potion... although many of us have used it like asprain-for-everything for years! apparently whatever you are doing with it isn't working of your present problem, and may even cause you some grief - small or large - down the road.
Good luck on finding & fixing this nuisance noise!
R
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