Model: Avalanche 2500
Engine Size: 8.1L
Refrigerant Type: 134 A
Country of Origin: United States
Just Wanted to ask before proceeding.
Took my 03 avalanche 2500 8.1L to a local a/c repair shop today and they told me that I would need a Compressor, Condenser, orifice tube and accumulator. Told me that the Fan clutch (hopefully meant the a/c clutch) had not been turning for some time and the system was full of metal.
Is this reasonable that the fan clutch had not been working even though the unit would cool as of yesterday?
Edited: Tue July 08, 2014 at 7:52 PM by troberts007
Never mind found metal in the orifice tube filter.
Yes, he actually meant the radiator fan clutch.
Fan clutch wears out. Fan speed drops. Engine still cools, but the decreased airflow drives the A/C head pressures way up. The system still cools, but is working itself to death. Compressor sheds metal in to primary filter (called the condenser) and dies.
If you find metal all the way at the Orifice Tube, then you know the rest of the compressor is in the condenser.
Manufacturers warranty the engine. They build enough reserve in to the engine cooling that you will barely notice a dead fan clutch under most conditions. No overheated engine. Maybe a needle width more on the temp gauge than you saw a couple years ago...
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.
I had a bad fan clutch awhile back on my '90 Chevy truck. The symptoms were pretty obvious on a hot Arizona day....engine temp just fine when driving, but when idling for an extended period of time, engine temp would continually creep up to where I'd start getting concerned. When I pulled the old fan clutch, it didn't feel loose at all, and it didn't free-wheel when spun by hand, so I was a little skeptical that it was the issue. But after putting in a new fan clutch, those symptoms went away.
I'm just saying that fan clutches can deceive you into thinking they're all right if you haven't worked with them before.
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