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Old 05-22-2006, 11:09 AM
jcyuhn jcyuhn is offline
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Join Date: Jun 2000
Location: Plano, TX
Posts: 2,574
It's easy to measure on the car using plain old feeler guages. I'm not familiar with the underhood layout of the 124.034, you may have to go in from the bottom of access from up top is too tight. Attached thumbnail has it correct, you measure just in front of the pulley turned by the serpentine belt.

Gap is specified as 0.50mm plus or minus 0.25mm. My unscientific observation is that clutch engagement gets a bit flaky when the gap gets up near 0.90mm. Sometimes you can get it working by degreasing the clutch using brake parts cleaner or similar. No disassembly required, just spray it in there.

I checked the gap on my 124.028 while servicing the a/c a few months ago. It's up around 0.80mm and works fine; compressor never drops out on that car. (Knock on wood...).

- JimY
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