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Belt Squeal in A/C, Pwr Steering & Tensioner Loop

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Old 24 May 2011, 01:37 pm
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Default Belt Squeal in A/C, Pwr Steering & Tensioner Loop

I'm about to take on some needed repairs on my '03 PT Turbo this Memorial Day Weekend - namely motor mounts, front wheel bearings & rear camber/toe (great posts/pictures throughout the forum on these repairs).

But I have another vexing problem that needs help from others.

I have a belt squeal issue on the A/C, power steering and tensioner loop. I've replaced the power steering and the tensioner assembly and belt to no avail.

The current squeal occurs whenever the A/C is turned on - either direct request for A/C or window defog. The squeal (very high pitched and can't miss the sound) appears to occur initially (about 5 to 15 secs) when the compressor cycles on and then goes away until the next cycle from off to on. Whenever it is raining the squeal will be more pronounced (i.e. louder).

AC works fine during all of this.

It seems to me that either the A/C compressor clutch is going out or the A/C compressor bearing is giving a problem. Although I would think if the bearing were the issue it would occur all the time and not just when the compressor cycles.

In any case, it's the last thing to try. Any others have ideas to check.

I'm going to attempt to replace the A/C clutch on the compressor - not sure if this can be done on the vehicle or it has to be totally removed.

Anybody have pointers on this?

Any help would be appreciated!
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