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Re: AC compressor help
HTX, reading your latest info eliminates a need to replace compressor & the clutch isn't the issue either. It could still be overcharged. The belt, like everything else on planet earth, has a harmonic threshold. When stresses reach a certain point, these harmonics kick in and can be very destructive. The answer can be as simple as belt replacement or installing an extra pully\idler in the center of the offending belt section or doing some repositioning of components so you can use a shorter belt. Don't loosen the belt, it will slip and tightening it to much will hurt the water pump bearing. Make sure all components and brackets are tight and not cracked. Please keep us informed on your progress and what ultimately fixes this. It is a fairly common issue and others may need thie info. Jim
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1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shot  Jim or Paladin whichever you choose.
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