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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Jerr-conn on February 08, 2018, 09:01:06 pm

Title: 87 350 tbi a/c drive belt
Post by: Jerr-conn on February 08, 2018, 09:01:06 pm

Last spring I put a new a/c belt on . It slips and squeals like heck when I turn
Air on. Belt is tight. Might be too narrow. Not sure, but might be 3/8".                                      Want to know what is the best belt To buy and dimensions including width? Or pt # ?

Title: Re: 87 350 tbi a/c drive belt
Post by: bd on February 08, 2018, 10:31:37 pm

W/P, crank, P/S pump, A/C compressor:  7/16" x 55.5"  Goodyear Gatorback 15561

Crank, P/S pump:  7/16" x 39.5"  Goodyear Gatorback 15402

Title: Re: 87 350 tbi a/c drive belt
Post by: haroldwca on February 09, 2018, 10:30:21 pm

Is your AC compressor in good working order?  When the AC is switched off, the belt idles on the compressor pulley.  When the switch is turned on, the compressor clutch engages the compressor pulley to the compressor internals.  If the compressor is seizing, when you switch the AC on, the belt will be pulled around a pulley that cannot rotate.  This will not last long, as it will burn the belt off. I would begin by checking the compressor.

Title: Re: 87 350 tbi a/c drive belt
Post by: Jerr-conn on February 10, 2018, 11:14:38 am

The clutch works good . A/c comp is good. Used some special belt dressing and squealing stopped for a week. Am sure I have too narrow belt. Will try belts as suggested by B D. Thanks anyway.

Title: Re: 87 350 tbi a/c drive belt
Post by: Jerr-conn on February 10, 2018, 12:20:06 pm

B D /Rich-----having a heck of a time finding someplace that carries Goodyear gator back belts.
Amazon listed some but not those pt 15561 & 15402. Any ideas?   Thanks.    Jerry

Title: Re: 87 350 tbi a/c drive belt
Post by: bd on February 10, 2018, 01:45:55 pm

Just cross the numbers to Dayco or Gates.

Title: Re: 87 350 tbi a/c drive belt
Post by: Jerr-conn on February 10, 2018, 04:41:15 pm

Thanks again Rich.