QuestionQUESTION: A/C clutch seems to be making a horrible noise as engine is idling. I'm assuming the bearing is shot and was wondering if this is a DIY project while compressor is inside vehicle. System is charged and still works but just don't want the drive belt to disintegrate when it finally freezes up. If not, is it possible to get shorter belt and just bypass the compressor? Thank you for your time.
ANSWER: Hi Dan,
The manual shows that clutch replacement as to include removing the compressor and collecting the refrigerant for re-use. It would be worth inquiry at an a/c shop as to whether they have changed out the clutch without de-mounting the compressor, or at a minimum, demounting the compressor and replacing the clutch without removing the lines or collecting the refrigerant. In theory it looks possible but perhaps I don't appreciate a finer point that would make your approach viable.
It would appear that you could find a shorter belt, if necessary but I can't be certain there is one that will work without measuring the new pathway, which would still want to include the idler pulley so that the belt could be tightened to the necessary degree.
In conclusion, it is worth investigating but I can't give assurance that it will work.
Roland
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Thanks
---------- FOLLOW-UP ----------
QUESTION: Hey there Roland,
Thanks for the reply. I removed the drive belt to make sure it was the a/c clutch making the noise. Its not unfortunately. Sounds like a bad bearing or rumbling behind the crank pulley. Son said oil light had come on last week for a brief period. My guess now is the oil pump. Have you heard of this before with this engine? Car had sat for two years while waiting for him to get his license. (changed all fluids before starting first time) Someone brought up the possibility of a spun bearing but I don't know what that sounds like. Any input would be appreciated. TY
AnswerHi Dan,
I haven't heard of a weak spot involving a main bearing or the oil pump. A brief oil light would be not significant if it happened when idling, as that is common. The other possibility is the water pump bearing which might be more likely given the 'sitting' time that transpired. That is behind the timimg belt covers too and might sound like it is coming from the same ares, though a bit higher than the crankshaft/oil pump. A machinest at a machine shop might be a good resource since sounds can be deceptive. In any case you will have to remove the belt covers and the timing belt probably so you could try spinning the water pump pulley at that point. Sorry to learn of the complication and best of luck.
Roland
