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05-07-2008, 10:39:56 PM
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#1
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Veteran Member
Join Date: Apr 2007
Location: Franklinville, NJ
Posts: 462
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serp. belt squeel
On my 88 Trans am... Tore it apart to put new head gaskets on 6 months ago and bought a new dayco belt. Thing squeeled since day 1. Belt dressing helps it for 2 seconds then it starts screeching horribly. I'm trying to sell this car and don't wanna spend another $20 on another belt.
anyone know a fix to stop serp. belt squeel?? I know its not any bad bearings or anything. I bought a dayco for my s-10 last week and that sucker squeeks too!!!
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05-07-2008, 10:55:26 PM
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#2
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Veteran Member
Join Date: Nov 2000
Location: Philly area
Posts: 10,881
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Is the belt tensioner near the middle of it's range? There will usually be 2 hash marks on one half of the tensioner housing and 1 hash mark on the other half. The single hash mark should line up somewhere between the two hash marks- that indicates the belt is the right length and the tensioner is putting the right amount of tension on it.
Typically, if you're running the tensioner out of adjustment range (almost fully extended to it's stop) it won't be supplying enough tension and you'll get a constant squealer.
Take a picture of the hash marks and post it up, if you like. I've worked on a lot of 3rd gens- I can tell at a glance if it's right.
I've used Dayco belts and I've used Goodyear. Had problems with neither.
__________________
1990 454SS pickup. Original "tow truck motor" 454 upgraded to something a little more "aggressive." Seems pretty stout but the fuel bill is nuts.
78 Malibu. Inherited with only 35K on the odo! Mild 383 with Weiand 142 blower on top. Mid 12s appears to be the best it's gonna do on street rubber. Runs so good I may never drive it again.
"Last remaining QJet tuner on planet Earth!"
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05-07-2008, 11:35:06 PM
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#3
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Veteran Member
Join Date: Apr 2007
Location: Franklinville, NJ
Posts: 462
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haven't looked at in a while, but if i recall the single line matches up with the 2 lines. I am going off memory though, so i will take a snap at it tomorrow and post up.
It's just strange that both dayco belts i purchased from pepboys squeeled.
I guess what i'll also do is add a little tension to the belt with a 3/8 breaker bar. If the belt is the right size, maybe the spring in the tensioner just weakened up and i need a new tensioner.
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05-08-2008, 08:17:52 AM
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#4
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Veteran Member
Join Date: Nov 2000
Location: Philly area
Posts: 10,881
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That's possible, too. Fortunately, 3rd gens have a little "square" cast into the top of the tensioner that you can put a ratchet drive into directly. It's there to give you an easy way to remove tension so you can get the belt off, but I suppose you could apply more tension there just as easily.
__________________
1990 454SS pickup. Original "tow truck motor" 454 upgraded to something a little more "aggressive." Seems pretty stout but the fuel bill is nuts.
78 Malibu. Inherited with only 35K on the odo! Mild 383 with Weiand 142 blower on top. Mid 12s appears to be the best it's gonna do on street rubber. Runs so good I may never drive it again.
"Last remaining QJet tuner on planet Earth!"
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05-08-2008, 09:09:29 PM
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#5
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Veteran Member
Join Date: Apr 2007
Location: Franklinville, NJ
Posts: 462
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got a pic of it...
Was in a hurry, and the battery was dead, so i didn't get to put any tension on it while running. Will do that tomorrow. My memory served me right, looks like the belt length is just right....
that is a new idler pulley btw
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05-08-2008, 10:00:43 PM
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#6
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Veteran Member
Join Date: Nov 2000
Location: Philly area
Posts: 10,881
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That's about right for a fresh belt. It's on the tight end of it's range. When it stretches from running for a few hours it'll line up on the 2nd hash mark. When it's worn out it'll be below the 3rd one.
So, no help on that one.
Strange.... serp. belts almost never squeal unless they're way past shot or improperly tensioned. I mean, they have a TON of contact with the pulleys they go around.
Let us know how it goes with the "artificial tension" experiment.
__________________
1990 454SS pickup. Original "tow truck motor" 454 upgraded to something a little more "aggressive." Seems pretty stout but the fuel bill is nuts.
78 Malibu. Inherited with only 35K on the odo! Mild 383 with Weiand 142 blower on top. Mid 12s appears to be the best it's gonna do on street rubber. Runs so good I may never drive it again.
"Last remaining QJet tuner on planet Earth!"
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05-08-2008, 10:31:03 PM
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#7
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Veteran Member
Join Date: May 2000
Location: Los Angeles
Posts: 7,597
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Try spraying a little WD-40 on the both sides of the belt when it's running. I've had some wierd belt noise in the past and the WD-40 helped. Ironically, anti-squeal always made it worse.
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05-08-2008, 10:48:18 PM
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#8
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Lifetime Gold Member
Join Date: Nov 2004
Location: Patterson, NY
Posts: 2,860
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RTV also works.
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05-08-2008, 11:07:28 PM
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#9
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Veteran Member
Join Date: Apr 2007
Location: Franklinville, NJ
Posts: 462
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yea i've heard of the wd-40 trick.. i'll try that..
Quote:
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Originally Posted by GetMore
RTV also works.
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RTV? never heard of that before... What do you do with it?? |
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05-08-2008, 11:21:25 PM
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#10
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Veteran Member
Join Date: May 2000
Location: Los Angeles
Posts: 7,597
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Quote:
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Originally Posted by muenk79z28
RTV? never heard of that before... What do you do with it??
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RTV on belts? Yeah, I'm kinda curious myself.  |
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