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Any mechanics on here?

Posted on 2/17/24 at 5:50 am
Posted by TaderSalad
mudbug territory
Member since Jul 2014
24686 posts
Posted on 2/17/24 at 5:50 am
I changed out an old serpentine belt with a new one from o’reilly’s. It’s a Gates belt.

My issue is now I get a sporadic but pronounced squeal/chirp for about a half second to a second on cold starts right as engine fires up. Doesn’t occur as it’s turning over and goes away completely after. No noises or loss to performance.

Been reading a lot of forums and can’t find anyone with the same problem. Most are failing pulleys or tensioners but there’s a constant noise for that diagnosis.

TIA
Posted by Philzilla2k
Member since Oct 2017
11085 posts
Posted on 2/17/24 at 6:03 am to
Probably new belt issue. Should go away.
Posted by SaDaTayMoses
Member since Oct 2005
4324 posts
Posted on 2/17/24 at 6:50 am to
put some belt dressing on it and see if that helps until it gets broken in.
Posted by JRinNOLA
Uptown New Orleans
Member since Feb 2020
76 posts
Posted on 2/17/24 at 9:16 am to
You probably need a new belt tensioner too. Spring can get weak , also tensioner can lean out and not be in alignment with all other pulling. Also we we used to wire brush the paint off the new tensioner cause it can transfer onto Belt and cause noise too. I worked at a Chrysler dealer. Changed many belts and tensioners. We would not ever change just the belt. Hope this helps.
Posted by chrome1007
Toledo Bend
Member since Dec 2023
124 posts
Posted on 2/17/24 at 12:11 pm to
My first thought is did you get the correct replacement belt from gates?
Second, how many miles do you have on the vehicle? I usually replace belt tensioner when I replace the belts at 60,000 miles. Belt dressing helps.
Good luck.
Posted by choppadocta
Louisiana
Member since May 2014
1872 posts
Posted on 2/17/24 at 5:23 pm to
Double check your belt routing. One of the mechanics I work with had a similar chirp on his Tundra and I went and looked at it and the belt was routed wrong. Once he got that straightened out the noise went away. It's not hard to do and I'm talking about an aircraft mechanic with years of experience.
Posted by Redlos
Baton Rouge
Member since Jul 2005
1050 posts
Posted on 2/17/24 at 9:08 pm to
I had a belt (low hours) making noises on my C3 Vette. It’s got a serpentine on an LS1.

I got tired of spraying the belt dressing, installed a new OEM belt and the noise disappeared.
Posted by Shellbeacher
Member since Jul 2020
23 posts
Posted on 2/18/24 at 9:36 am to
Rub a bar off of soap on the inside of belt carefully while motor is running. Seriously. It works. Better than any belt dressing. Just hold it against it for 5 seconds or so.
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