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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Mamby on May 22, 2008, 02:27:13 pm

Title: Pulley Squeal?
Post by: Mamby on May 22, 2008, 02:27:13 pm

Whenever i start my truck up it usually squeals for about a second then it stops, but now, it does it when im driving. I dont think its the belt because ive put belt dressing on it. I think it might be a pulley bearing? any ideas?

Title: Re: Pulley Squeal?
Post by: ccz145a on May 22, 2008, 02:59:17 pm

it's the belt. get a new one... dressing never works for long.

Title: Re: Pulley Squeal?
Post by: VileZambonie on May 22, 2008, 04:20:40 pm

Ditto, never use dressing, just replace the belt.

Title: Re: Pulley Squeal?
Post by: HAULIN IT on May 22, 2008, 04:28:00 pm

Mamby, Yes, change the belt. Also run a piece of 180-220 grit sand paper on the pulley grooves. If the vehicle has been sitting for a little while, a minimal  rust build-up can form on the exposed parts & cause the squeal. Lorne

Title: Re: Pulley Squeal?
Post by: Mamby on May 22, 2008, 08:52:53 pm

ah, found out what it was, alternator belt was loose, go figure, the only belt i didn't check.

Title: Re: Pulley Squeal?
Post by: the_legend_1981 on May 22, 2008, 08:57:44 pm

Same thing just happened to me

Title: Re: Pulley Squeal?
Post by: Stewart G Griffin on May 23, 2008, 09:50:32 am

i just went thru this ordeal 2 months ago;

Not only get a new belt, but get a Gates belt;  That Dayco stuff won't cut it.

Please refer to this thread regarding my plight:
http://forum.73-87chevytrucks.com/smforum/index.php?topic=5454.msg26521#msg26521

Title: Re: Pulley Squeal?
Post by: Stewart G Griffin on May 23, 2008, 09:54:43 am

UPDATE:

Ok, i see it was that the belt was loose.   Anyways, i feel my thread is good reading anyways.

Title: Re: Pulley Squeal?
Post by: 78 Chevyrado on May 23, 2008, 10:46:15 pm

Clean the pulleys, sometimes they get oil on them that never goes away on it's own.  Loose will do it too ::)