AC Compressor Going Bad? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-08-2003, 11:23 PM   #1
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Default AC Compressor Going Bad?

I was driving with my windows down today so of course the AC wasn't on, until my son in the back seat didn't want the windows down (going 70mph probably gets a bit windy back there), so I rolled up the windows and turned on the AC. A few thing happened. My temp went up by probably 10 degrees and also I lost quite a bit of power. I know I will loose some power with the AC on but this was more than usual. The whole shudder that has been talked about recently showed back up. So I am thinking there is something wrong with my AC system. I did a few more test and while going about 45 with AC on temp gets almost to 210 to 220 but with the AC off it will drop back down to 200.
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Old 09-09-2003, 02:51 AM   #2
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Hi Michael the compressor on my 96 is going bad too. These compressors are called V5'*, and are known for front seal, and side case leaks. Mine started leaking oil where the cases come togathe. Before i knew oil was lost the compressor started rattleing slightly when on.
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Old 09-09-2003, 08:32 AM   #3
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Mine was making some noise at the beginning of the summer and I put some oil in it and the noise stopped.
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Old 09-09-2003, 01:41 PM   #4
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Default Re: AC Compressor Going Bad?

Quote:
Originally Posted by parallelcircuits
I was driving with my windows down today so of course the AC wasn't on, until my son in the back seat didn't want the windows down (going 70mph probably gets a bit windy back there), so I rolled up the windows and turned on the AC. A few thing happened. My temp went up by probably 10 degrees and also I lost quite a bit of power.
That shouldn't happen. On mine, the temperature actually goes _down_ slightly with the A/C on, because the system overrides the thermal switch and runs the cooling fans continuously while the A/C is operating.

1) Do you have the electronic A/C controls? If so, do you have a blinking temperature display for the first two minutes of driving? If so, there'* an error code you need to extract.

2) Have you verified that the cooling fans are operating while the A/C is on?
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Old 09-09-2003, 02:25 PM   #5
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Try turning the compressor by hand to see if it locks or binds up anywhere.
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Old 09-09-2003, 02:36 PM   #6
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Quote:
Originally Posted by acg_ssei
That shouldn't happen. On mine, the temperature actually goes _down_ slightly with the A/C on, because the system overrides the thermal switch and runs the cooling fans continuously while the A/C is operating.

1) Do you have the electronic A/C controls? If so, do you have a blinking temperature display for the first two minutes of driving? If so, there'* an error code you need to extract.

2) Have you verified that the cooling fans are operating while the A/C is on?
I do not have the Electronic AC controls, and the fans run when the AC is turned on.
Would this throw any minor codes I would need a reader to look at?

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Originally Posted by fuddyduddy121
Try turning the compressor by hand to see if it locks or binds up anywhere.
How do I do that. Doesn't the Compressor have a clutch in it that is electronically controlled.
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Old 09-09-2003, 04:52 PM   #7
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Quote:
Originally Posted by parallelcircuits
I do not have the Electronic AC controls, and the fans run when the AC is turned on. Would this throw any minor codes I would need a reader to look at?
Not to my knowledge. The manual A/C doesn't have a processor to display its own error codes, since it doesn't have a controller that would detect them or need to display them.

Quote:
Originally Posted by parallelcircuits
Quote:
Originally Posted by fuddyduddy121
Try turning the compressor by hand to see if it locks or binds up anywhere.
How do I do that. Doesn't the Compressor have a clutch in it that is electronically controlled.
Yes, but it'* deactivated when the engine is off. Just grab the hub with your hand and try to turn it. It should turn relatively freely.
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