Alternator Squealing
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From: Phila Suburbs 2023 C8 & 2013 650ix
Alternator Squealing - Possible Crank Bolt Problem
Belt seems tight but when I rev the engine above idle I'm getting a constant squeal from the alternator area. Taking it in for service tomorrow to see if the alternator bearings are shot. Anyone else experience these symptoms????
Last edited by Walt White Coupe; Dec 18, 2006 at 09:17 AM. Reason: update
Team Owner
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From: Arizona
Originally Posted by Walt White Coupe
Belt seems tight but when I rev the engine above idle I'm getting a constant squeal from the alternator area. Taking it in for service tomorrow to see if the alternator bearings are shot. Anyone else experience these symptoms????
You may be experiencing the crankbolt starting to back out.
VIN's from around 11,000 and earlier '05's affected.
Do a search here oon the forum, and check your crankbolt before proceeding. Or have it flat bedded to your dealer.
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From: Phila Suburbs 2023 C8 & 2013 650ix
Originally Posted by Hoonose
If you have early '05 DO NOT EVEN DRIVE IT!
You may be experiencing the crankbolt starting to back out.
VIN's from around 11,000 and earlier '05's affected.
Do a search here oon the forum, and check your crankbolt before proceeding. Or have it flat bedded to your dealer.
You may be experiencing the crankbolt starting to back out.
VIN's from around 11,000 and earlier '05's affected.
Do a search here oon the forum, and check your crankbolt before proceeding. Or have it flat bedded to your dealer.
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From: Phila Suburbs 2023 C8 & 2013 650ix
Just got car back from service and all they would tell me is that I had a "noisy belt" that was replaced under warranty. Test drive and squeal is gone. Don't really understand "noisy belt."
Le Mans Master
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From: Farmingdale NY
St. Jude Donor '06
Originally Posted by Walt White Coupe
Just got car back from service and all they would tell me is that I had a "noisy belt" that was replaced under warranty. Test drive and squeal is gone. Don't really understand "noisy belt."
Belt was bad and needed replacement.
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From: Phila Suburbs 2023 C8 & 2013 650ix
It's back. New belt solved the problem for 200 miles and now it's chirping/squealing again from idle on up just like it did before. I hate it when a repair shop can't fix a simple problem the first time and you have to keep taking it back over and over. The only thing that I know of that will cause a belt to squeal is loss of tension so I'm assuming it's the tensioner that is actually what has gone bad. We'll see what they say next.
Melting Slicks
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From: Pasadena, CA
Originally Posted by Walt White Coupe
It's back. New belt solved the problem for 200 miles and now it's chirping/squealing again from idle on up just like it did before. I hate it when a repair shop can't fix a simple problem the first time and you have to keep taking it back over and over. The only thing that I know of that will cause a belt to squeal is loss of tension so I'm assuming it's the tensioner that is actually what has gone bad. We'll see what they say next.
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From: Life ain't no dress rehearsal, are you gonna wait to get your toys til AFTER you have a heart attack?
Originally Posted by JVM225
It is more common than you think.
Belt was bad and needed replacement.
Belt was bad and needed replacement.
Last edited by PappyTinker; Dec 3, 2006 at 02:19 PM.
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Belt dressing is an expedient to temporarily stop an old glazed belt from slipping/squealing until it can be replaced. Since they already installed a new belt, putting on belt dressing is not the thing to do. Instead, they should be trying to discover why a belt, even a new belt, is squealing. The two most common causes of belt squeal are inadequate belt tension or improper pulley alignment.
But we aren't even sure at this point if the noise is belt squeal. It could still be faulty bearings. Bearing squeal can go away temporarily when you adjust belt tension or alignment because this changes the loading on the bearings. But bad bearings will quickly start to squeal again.
But we aren't even sure at this point if the noise is belt squeal. It could still be faulty bearings. Bearing squeal can go away temporarily when you adjust belt tension or alignment because this changes the loading on the bearings. But bad bearings will quickly start to squeal again.
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But we aren't even sure at this point if the noise is belt squeal. It could still be faulty bearings. Bearing squeal can go away temporarily when you adjust belt tension or alignment because this changes the loading on the bearings. But bad bearings will quickly start to squeal again.[/QUOTE]
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From: Phila Suburbs 2023 C8 & 2013 650ix
Originally Posted by drummingman
But we aren't even sure at this point if the noise is belt squeal. It could still be faulty bearings. Bearing squeal can go away temporarily when you adjust belt tension or alignment because this changes the loading on the bearings. But bad bearings will quickly start to squeal again.
[/QUOTE]If it were an alignment issue the first belt would not have lasted 18,000 miles. So I don't think it's an alighnment issue. If it were bearings in the alternator sqealing, I would think they would be toast by now and the alternator would have seized. And I would hope the mechanic checked for an accessory drive bearing failure as the manual describes before replacing the belt. My money is still on it being the belt tensioner but time will tell. Hope to have it back in the shop by this Tuesday.
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From: Phila Suburbs 2023 C8 & 2013 650ix
Update on Repair & Problem
Drop the car of at Thomas Chev. Get a call that they have to keep the car because the "engineers" have decided that the problem is the belt tensioner pulley. Next day they install the pulley, squeal is still there. The "engineers" decide it must be the idler pullley, another day to order that. End of the next day they say they replaced both pulleys and both belts. No more squeal. Mileage at 18915. 75 miles later start it up and the squeal is back. With the car running I can see that the crank pulley is not running dead nuts straight and has an ever so slight wobble to it. My car is well over the 11039 build number that is suppose to be affected by this "Crank Bolt" problem. My build is 29432. Made an appointment to bring it back tomorrow.
QUESTION: Anyone in the Delaware County, PA area have a recommendation for a dealer in the area that has done the crank bolt repair and that they would recommend. Don't have much confidence in Thomas Chev at this point. Still not 100% sure that is the problem but it sure looks like it to me at this point. Also, I haven't seen any reports from people with cars out of the affected range complain of this problem, are there any out there????
QUESTION: Anyone in the Delaware County, PA area have a recommendation for a dealer in the area that has done the crank bolt repair and that they would recommend. Don't have much confidence in Thomas Chev at this point. Still not 100% sure that is the problem but it sure looks like it to me at this point. Also, I haven't seen any reports from people with cars out of the affected range complain of this problem, are there any out there????
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From: Huntington Beach California
Drop the car of at Thomas Chev. Get a call that they have to keep the car because the "engineers" have decided that the problem is the belt tensioner pulley. Next day they install the pulley, squeal is still there. The "engineers" decide it must be the idler pullley, another day to order that. End of the next day they say they replaced both pulleys and both belts. No more squeal. Mileage at 18915. 75 miles later start it up and the squeal is back. With the car running I can see that the crank pulley is not running dead nuts straight and has an ever so slight wobble to it. My car is well over the 11039 build number that is suppose to be affected by this "Crank Bolt" problem. My build is 29432. Made an appointment to bring it back tomorrow.
QUESTION: Anyone in the Delaware County, PA area have a recommendation for a dealer in the area that has done the crank bolt repair and that they would recommend. Don't have much confidence in Thomas Chev at this point. Still not 100% sure that is the problem but it sure looks like it to me at this point. Also, I haven't seen any reports from people with cars out of the affected range complain of this problem, are there any out there????
QUESTION: Anyone in the Delaware County, PA area have a recommendation for a dealer in the area that has done the crank bolt repair and that they would recommend. Don't have much confidence in Thomas Chev at this point. Still not 100% sure that is the problem but it sure looks like it to me at this point. Also, I haven't seen any reports from people with cars out of the affected range complain of this problem, are there any out there????
Melting Slicks
Joined: Oct 2005
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From: Pasadena, CA
...Alternator replaced. Squealing is now gone.
