I have an 82 300cd that squeals when the AC is turned off. I know that the noise is coming from the pulley itself, specifically the bearing inside it. The car has been converted to 134a and blows nice and cold, but whenever I turn off the AC, or it cycles off because of the ACC, it starts skreeching. Is it possible to replace the bearing on the pulley? I have a 300d with the AC compressor disconnected electrically (The belt is still on). I tried to find the whole pulley at the local parts house, but they couldn't get it, Is it possible to yank the pulley off the 300d and put it on the 300cd? Not sure that it works, but at least it doesn't squeal. Any help would be appreciated. Thanks!

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1982 300d -Adolf- Got it for 500 bucks from a guy that thought he knew how to make biodiesel. Even the best diesels won't run on burnt french fry ends! 318,000 and counting
1982 300cd -Erwin- 107,000 miles! The most fun you can have in a diesel. Wrecked by an idiot, massive insurance payout for me. Tough to see you go, my friend.
1983 300d -Katrina- Another five hundred bucks. Straight outta New Orleans, by way of Maryland. Work in progress. 291,000 and counting

You can remove the clutch and pulley for replacement but will require some special tools.

Harrison R4 AC Compressor Repair Tutorial

Yes if it is an R4 on the parts car and on your CD, it should fit.

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1983 123.133 California
- GreaseCar Veg System

An insufficient clutch air gap can also cause such a noise.