Clicking noise under hood w/ AC on [Archive] - Forum


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08-12-2005, 01:48 PM
After I had to replace my power steering pump (and drive belt) a few weeks ago, the engine started making this weird clicking sound whenever I turn on the A/C. Anyone know what this could be?

08-12-2005, 05:12 PM
Does it get cold?

08-12-2005, 06:08 PM
If the a/c does not get cold the clicking noise you are hearing is the clutch turning on and off you need to add more coolant untill it stays on.

08-12-2005, 10:45 PM
the air coming out is cold, but that noise really makes me nervous. its pretty loud

08-13-2005, 12:43 AM
i hear that same clicking when my air is on . i had my air re-filled etc . everything works great . would like to know if that is normal. sounds like something is being turned on and off.

08-15-2005, 06:01 PM
it was one of the pulleys and it was loose. I finally figured out what it works fine now that its been tightened

08-16-2005, 02:05 AM
which pulley was it / location how much did you tighten it pounds per square inch .

09-05-2005, 01:52 AM
an audible clicking sound is perfectly acceptable as the AC compressor has an electromagnetic clutch on it. the AC senses when the compressor is needed and not needed and cycles it accordingly.

as for adding coolant... adding coolant to the vehicle will do nothing for the AC system. the heating and cooling systems of the vehicle are completely separate. to add anything to the AC you need to add refrigerant, which is best left to a qualified technician.

09-05-2005, 07:51 AM
you need an A/C compressor.

09-07-2005, 09:36 PM
ok, well I foung out that its the pulley towards the rear of the car and down on the bottom that is shaped like a tear drop (kind of). it moves back and forth and makes a pretty noticeable clicking sound. but I cant figure out how tight or loose to make it so it doesnt click.