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1994 Jeep 4.0L A/C makes rattle/drumming sound when turned on. About a second. System blows cold, but the compressor is more noisy than the old compressor? Started when new compressor installed.

New fan, belt, tensioner bearing, clutch and compressor. Vendor tested and said it was okay. Battery good, voltage display in the cab is steady at 13 volts.

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Posted on Jan 02, 2017

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SOURCE: 2003 Tahoe (5.3). AC belt/tensioner/compressor (Chatters)

The compressor is bad. I have the same problem. Apparently none of the tahoe's compressors are worth a ****! im having to replace mine too. You have to change the compressor, the accumulator/dryer, orifice tube and flush the lines. If you look on ebay you can buy a complete kit to change it all for about 300 bucks. The dealership tells me that you need to change the fan clutch as well. They told me that the reason for the noises is the fan clutch isnt working properly and it lets the compressor get too hot causeing higher pressures in the compressor due to the heat. They called it liquid slugging I believe. Mine doesnt break the belt but when you give it very much gas it makes a squeal and then a grinding noise like your trying to put a standard transmission in gear with it running without pushing in the clutch. I asked if you could just change the fan clutch and they told me no its too late, you have to change the compressor and dryer/orifice tube.

Posted on Jun 23, 2009

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SOURCE: 2005 Jeep GC with 4.7. A/C compressor will not run.

Check the low pressure sensor and the hi pressure sensor to be sure they are operating properly. Also check compressor relay and all fuses.

Posted on Jul 23, 2009

  • 749 Answers

SOURCE: when the Jeep was new the volt meter read 14

Generally the standard voltage should be 13.5 to 15.5 depending on the load that is being put on the vehicle and age of the battery an older battery may require more voltage to charge. Unless the voltage drops below 13 you are probably ok.

Posted on May 28, 2010

  • 1050 Answers

SOURCE: My lexus rx300 new belts are squelling,battery light on,

It sounds like you have loose belt(s). When the A/C is turned on, it puts a big load on the belt, if it is loose and starts slipping and squeeling, then the alternator won't turn, so the battery runs down as you drive. Make sure all your belts and battery terminals are tight.

Posted on Jul 16, 2010

  • 1340 Answers

SOURCE: I have a 2001 Yukon XL 1500. I broke an AC belt.

Actually,you both could be right.It may be the bearing inside the compressor.The compressor does not make the cold air,it helps pressurize the system to get the freon from the evaporator to the condenser.The evaporator provides the cold air.If you can,open your hood and have someone start your car.Have them give it some gas and see if you can pinpoint the noise more accurately.If your compressor bearing causes it to seize up,you will probably only get a couple of miles before your belt snaps.Another slight possibility is the tensioner.It's pretty rare but stranger things have happened.I did have a compressor seizure years ago and snapped a belt though.If you can pinpoint the noise it would help to know.If you can't I would like a better description of the noise though.Good luck! Greg

Posted on Sep 17, 2010

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