Ac compressor squeal.. - Ford Powerstroke Diesel Forum
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Old 10-08-2013, 02:03 PM
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Ac compressor squeal..

Hey guys I just recently bought my second obs 95 f350 4x4

Just starting to diagnose all the little issues but over all the truck is amazing! Thank you Texas .

Last night when I started up my truck it had a little squeal at idle not enough to really bother lifting the hood but by the time I got home it was getting really loud so I checked it out and it's the ac compressor squealing like a dying animal. I'm wondering if there is a way to rebuild these or shim them or just go buy a new one?

Don't think I can handle the noise for a nother couple days ..

Thanks guys

Sebastien
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Old 10-08-2013, 03:19 PM
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If the A/C is off, it's not the compressor. It's just the clutch. Don't remember for sure, but IIRC it's replaceable without removing the compressor proper, and without having to evacuate the refrigerant.

The HVAC control isn't set to windshield defrost by any chance, is it?
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Old 10-08-2013, 03:42 PM
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Okay then it's definitely the clutch because when the ac cycles it goes away while running then come back when it cycles off, is there anybody around here that has had the same issue ?
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Old 10-08-2013, 05:05 PM
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You didn't recently check the P/S fluid by any chance, did you? Or were you working with any other fluid under the hood? Asking because one day when I checked the P/S, I got careless with the cap/dipstick, and let some fluid (ATF) drip on the compressor. It got into the clutch plates, and it made, er, an unpleasant sound for several days. I was sweatin' bullets that I had trashed the compressor clutch, but it eventually went away, and the A/C still works just fine.

I did some research when it happened, and read that there are shims you can install; if I get a chance I'll look for those FSM pages and scan 'em.

Parts are available at RockAuto; clutch hub is $40-ish, complete assembly about $100.
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Old 10-09-2013, 02:55 AM
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Well I would have said that is the issue but it seems to have seized the thing is glowing red right now not sure what that means... It seized?
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Old 10-09-2013, 04:51 AM
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Eeek! Which part exactly is glowing red? The whole pulley? Does the pulley even turn, or is the belt just running over it without turning it?
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Old 10-09-2013, 05:25 AM
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The metal part at the front of the pulley , the pulley actually still spins but it really sounds like the bearing is seizing I just picked up a new one so ill pull the pulley off this evening and replace it, luckily I noticed the smell right before I got on the highway,

Hopefully that takes care of that!
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Old 10-09-2013, 05:48 AM
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Don't even test drive it with the new pulley on until you let it idle for a bit. While doing that cycle your a/c to engage and disengage the clutch and keep an eye on it.

The unit should get a little hot but definitely not glowing red.

Also try taking the belt off and free spilling it by hand to see what it does
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Old 10-09-2013, 07:53 AM
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I only bought a replacement bearing, I was going to start there? Is there anything I should know about replacing the bearing? Or should I just say screw it and replace the hole
Pulley?
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Old 10-10-2013, 03:01 PM
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Figured I'd give a little update, the pulley actually broke in half, it wasent attached to the hub anymore ... Lol ordered the part today should be all good and runnin tomorrow
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