Refrigerant Type: 134
Country of Origin: United States
My car has 170K mile on it and lately I've been noticing when the compressor clutch engages going down the highway it makes a louder click than normal; kind of like a metal springy noise when it engages. The noise is only there for the split second when the clutch engages. I checked the clearance on the clutch and it was on the loose end (.026) so I re-shimmed it to about .014-.015. The clutch is not worn down to the rivets, but after shimming it, I'm still getting that louder than normal metal springy noise when the clutch engages at higher RPMs. When the engine RPM is less than ~ 2500, it doesn't make the noise.
Any ideas what is causing this and if I should worry about it? The AC is still working great, but I'd rather deal with it on my schedule and not when I'm forced to... Thanks in advance.
Well I figured out that noise must be the clutch slipping slightly when it engages; (DUH)... I've measured the clearance between the clutch and pressure plate in several places and it ranges from about .005 - .015". There are still about .040" before the PP is worn down to the rivets. My question is, does this sound like the normal wear process of the clutch/PP or is there some other problem I need to check for? The AC is working great, but the clutch is starting to slip a bit more at lower RPMs now and when it does, I quickly turn it off and try it again. So far I've been lucky... I haven't measured the gap lately, but if it's the same or slightly worse than before, I'm going to try and tighten up the gap a couple thou in hopes of getting me through the summer. Then I'll change the clutch/coil assy. when it's cooler. I realize I'm on 'borrowed time' and that may not happen, but... Any suggestions/guidance is greatly appreciated!
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