<VV> 66 A/C Update

Garry ntcagp at sbcglobal.net
Tue Aug 23 21:59:19 EDT 2016

Thanks Bill,

I did realize after my test drive that I had seen, but forgot to cover 
the large hole by the oil cooler. I will fix that. Was not aware of the 
smog hole, so will take a look for that also.


On 8/23/2016 8:06 AM, William Garrison via VirtualVairs wrote:
> Garry,
> I have a '66 I drive daily and had the exact same problem as you have.  I
> replaced the A/C clutch, adjusted the clutch, tried everything I could
> think of related to the compressor and still would get that grinding sound
> when running the A/C on hot days, usually when I was stopped at a light.  I
> would turn the A/C off immediately so as not to ruin things.
> Trying to prove a theory, then I removed the lower shrouds, thinking that I
> might improve the air flow.  My theory was the pressures were climbing and
> causing the A/C clutch to slip.  That seemed to help, but didn't do the
> trick.  Still sometimes got the grinding sound.
> Next I replaced the weatherstripping around the engine cover and also
> sealed up the engine compartment everywhere I could find an air leak.  Not
> may air leaks, and the engine weatherstrip didn't look that bad, but I did
> seal off the recirculation opening below the oil cooler and put a plug in
> the hole '66s have on the other lower shroud for the smog tube (even when
> they didn't have smog).  Problem solved.  I have been driving all summer
> and the A/C works better than ever and no problems with the compressor
> clutch "grinding".
> I can't say this is your problem, but I spent a summer trying to "fix" the
> compressor when the real problem was air flow.  I've been a lot cooler this
> summer and the weather has been at least as hot if not worse.
> Regards,
> Bill Garrison
> Philadelphia Corvair Association
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