Question1991 Cadillac/ Deville/ 4.9L engine/ 80,000 miles/ purchased new.
Compressor growls/ makes a 'whirring' sound.....still cools the air.
Puzzle?...it growls with the ac on or off..!!?
Is it maybe just the pulley bearing?
We just replaced the original, with a reconditioned one, for the same noise, + it did quit cooling and the "check ac" light came on when you pushed 'auto'(auto would not stay on/ reverted back to 'econ')
I'm getting ready to replace the compressor again.
Any ideas or suggestions of things to do before, during, or after this operation?
Thanks much.....DeWayne
AnswerOH, DeWayne ,DeWayne , DeWayne, You replaced it with a reconditioned one.
1. WHY did you have to replace the original ?.
2. If you replaced it because it was SEIZED up there is most likely things you forgot to do which are:
1. Remove the original compressor.
2. Remove the orfice tube (expansion valve) from the system.
3. Did you FLUSH the entire A/C system witha flushing agent ?.
4. Did you replace the orfice tube ?.
5. Did you replace the receiver/dryer (accumulator) ?.
6. Did you install the correct amount of refrigerant oil ?.
7. Did you replace the correct amount of refrigerant ?.
8. Did you use a vacuum pump to extract all of the atmospheric air from the system after you put the system back together ?.
9. Did you check for leaks ?.
10. What are your high and low speed pressures according to the manifold set (A/C external gage set) ?.
I need to know the answers to the above questions.
I do not have a staff of people helping me answer your questions, I do it all by my self, Therefore, Due to being retired and a 15 year old computer on a dial-up connection, I do my best to respond to questions within 3 to 4 hours due to the volume of questions I receive on a daily basis. If you require a faster response you can e-mail me directly at the below e-mail address as I check it more frequently.:
meperganfortis@msn.com
semi-retired in New Mexico
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