belt/pulley squeal

sasafrass12 · February 12th, 2008, 10:17 PM

Help me out before I give up and get rid of the car. I have a supercharged 5.0 that has a loud squeal in one of the pulleys. I think it's the drive pulley, because that's the only one I can't get a listen on by using a metal bar without putting my life in danger. There is no rhyme or reason for when the squealing begins, usually keeps squealing until I stop the car, wait a minute, then drive off again and it becomes quiet only to start again for no apparent eason. I have changed belts, applied silicon (which helps for a short while). I am thinking of changing one pulley at a time and see if I can find the culprit, but I don't really want to go through all that unless I have to. The squealing is embarrasing, and ruins an otherwise nice cruise. Any suggestions would be appreciated. Note: I ruled out the supercharger by removing the belt and running the car without it.

Iownastang · February 12th, 2008, 10:43 PM

Originally Posted by sasafrass12

Help me out before I give up and get rid of the car. I have a supercharged 5.0 that has a loud squeal in one of the pulleys. I think it's the drive pulley, because that's the only one I can't get a listen on by using a metal bar without putting my life in danger. There is no rhyme or reason for when the squealing begins, usually keeps squealing until I stop the car, wait a minute, then drive off again and it becomes quiet only to start again for no apparent eason. I have changed belts, applied silicon (which helps for a short while). I am thinking of changing one pulley at a time and see if I can find the culprit, but I don't really want to go through all that unless I have to. The squealing is embarrasing, and ruins an otherwise nice cruise. Any suggestions would be appreciated. Note: I ruled out the supercharger by removing the belt and running the car without it.

i would haft to think it would be the alt or p/s

ryans88gt · February 12th, 2008, 11:28 PM

I had the same problem for a long time and replaced every pulley and every accessory and it still squealed. I got the belt prep spray and it would help for awhile, but eventually the squealing would come back. In the end I fixed it. I bought a belt that was 1 full inch smaller and the squealing immediately stopped and never returned. I had to loosen the alternator to get the belt on but there is no belt squeal. Try this or replacing the tensioner. I think the tensioners are like $40 at autozone.

e3sean · February 13th, 2008, 12:03 AM

93 hatch just had this problem it was hit tensioner pully bearing went bad

February 12th, 2008, 10:17 PM	#1
sasafrass12 Newbie Join Date: Aug 2007 Posts: 15	belt/pulley squeal Help me out before I give up and get rid of the car. I have a supercharged 5.0 that has a loud squeal in one of the pulleys. I think it's the drive pulley, because that's the only one I can't get a listen on by using a metal bar without putting my life in danger. There is no rhyme or reason for when the squealing begins, usually keeps squealing until I stop the car, wait a minute, then drive off again and it becomes quiet only to start again for no apparent eason. I have changed belts, applied silicon (which helps for a short while). I am thinking of changing one pulley at a time and see if I can find the culprit, but I don't really want to go through all that unless I have to. The squealing is embarrasing, and ruins an otherwise nice cruise. Any suggestions would be appreciated. Note: I ruled out the supercharger by removing the belt and running the car without it.

February 12th, 2008, 11:28 PM	#3
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 3,766	I had the same problem for a long time and replaced every pulley and every accessory and it still squealed. I got the belt prep spray and it would help for awhile, but eventually the squealing would come back. In the end I fixed it. I bought a belt that was 1 full inch smaller and the squealing immediately stopped and never returned. I had to loosen the alternator to get the belt on but there is no belt squeal. Try this or replacing the tensioner. I think the tensioners are like $40 at autozone. __________________ 89 LX 515 hp 497 ftlbs 11.3 @ 125 mph 88 GT 11.4 @ 118

February 13th, 2008, 12:03 AM	#4
e3sean MM Fanatic 1988 lx 5.7 11.6@109 Join Date: Nov 2007 Location: arizona Posts: 3,563	93 hatch just had this problem it was hit tensioner pully bearing went bad __________________ the only thing u will be burning by going with a 347 insted of a 331 is the guy driving the 331 MILITARY CREW USAF LUKE AFB AZ, E-5 SELECT 7995 AMMO I.Y.A.A.Y.A.S

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