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Old 08-23-2009, 08:42 PM   #1
notsosimple
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Default A/C Compressor: Grabs and Squeels on initial start up

Have had some AC issues (would hold charge) and found the leaky hose. Replaced, recharged, now I am having compressor issues. On the initial start up (First thing in the morning, when I get back to my WRX after work, etc) when I turn on the AC the compressor squeals for a good 2-3 seconds.

Checked tension on the belt, it is good. Belt is new within the last 7k miles, as is the tensioner pulley. Only thing that has changed was a recharge. Thinking maybe over charge of the system? Once the compressor is on and is done squealing, it will cycle without any sound at all.
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Old 08-25-2009, 02:14 PM   #2
notsosimple
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Anyone? So how do you properly service the clutch? Anyone have a part # or required parts to change it?
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Old 08-25-2009, 09:59 PM   #3
KootenayWRX
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I had the same prob, I just took the belt off(compressor) and told the kids its going to be a hot summer. I think its the A/C compressor clutch, I would like to know as well if its repairable or do you replace the whole compressor.
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Old 08-26-2009, 12:18 PM   #4
notsosimple
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Hoping to not replace the entire compressor as I would then have to pay to get the system vacuumed. Anyone?
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Old 08-26-2009, 11:24 PM   #5
sonic03rex
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bump, I have the same issues except mine decided to stop screaming for mercy, flooded the cabin with a burning smell, then completely stopped engaging all together.
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Old 08-26-2009, 11:58 PM   #6
KootenayWRX
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Bumpadge, Part number and replacement info needed. THX
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Old 08-27-2009, 08:02 AM   #7
Charlie-III
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I don't believe you can just replace the clutch (at least easily/cost effectively).

With the belt off, does the outer part of the clutch spin freely? It may have rust build up that can "sometimes" be removed by spraying a lot of WD-40 in the front gap between the 2 clutch parts while spinning the outer part. Cover things first as this is rather messy.

When done spraying, keep spinning to remove as much WD-40 as possible (compressed air can help here), then reattach the belt and start the car.
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Old 08-28-2009, 02:07 PM   #8
notsosimple
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Will rip it apart Monday, have the day off. I know that you can remove the outer clutch and service.
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Old 08-28-2009, 11:00 PM   #9
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Old 08-29-2009, 02:11 PM   #10
CoryH
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If you have some AC gauges put them on the high and low side start your car. If the low side goes to 0 quick turn off the car if it doesn't go back to 40 or 50 psi on the low side pretty quick its the expansion valve.
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Old 08-29-2009, 10:55 PM   #11
KootenayWRX
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Quote:
Originally Posted by notsosimple View Post
Will rip it apart Monday, have the day off. I know that you can remove the outer clutch and service.
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Old 09-02-2009, 02:48 PM   #12
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I do not have a set of manifold gauges; I think it would be a good idea to get some.

Anyway..Ripped a part the forward facing clutch disc. If you take the appropriate allen wrench, and a square shanked screwdriver, you can hold the clutch disc and take off the allen bolt. Be careful not to lose the shims. Looks like my compressor is leaking, but to be sure I cleaned it off really good and will re-inspect after a weeks usage.

It looks like you can take it apart further by using a pair of snap ring pliers and removing it from the compressor shaft. Did not go that far because I fixed it.

Just used a wire brush on both surfaces, then some WD40 to clean the crap off, wiped it down and started; thing is quiet as all get out now.
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Old 09-03-2009, 02:10 AM   #13
KootenayWRX
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Good one, does not sound too expensive, I llcheck it out even thou summers almost over.
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Old 09-06-2009, 05:32 PM   #14
strohausii
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Did you evacuate the system and hold for ~20 minutes?
Any residual moisture is hell to pay (litterally) in a/c systems.
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Old 09-08-2009, 01:15 PM   #15
notsosimple
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Quote:
Originally Posted by strohausii View Post
Did you evacuate the system and hold for ~20 minutes?
Any residual moisture is hell to pay (litterally) in a/c systems.
Why? I did not open the system. I just took the outer clutch disc off and clean. The system was not compromised at all.
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