| Re: Dash air conditioning [message #364823 is a reply to message #364813] |
Fri, 18 June 2021 12:15   |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
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I think others have touched on this but I'd like to reiterate that the design of the dash air on a 1976 GMC motorhome is poor from the start. The compressor is not likely the problem, unless you have leaks, bad bearings, etc. The A6 is a fairly large displacement compressor (I think), and is very durable.
There are modifications (I have not yet tried) that improve the air flow through the system. Air flow is what is lacking in our systems, I believe, and the mod in this link looks like a good fix.
http://www.gmcmhphotos.com/photos/g4637-type-ii-dash-air-condition-modification.html
<http://www.gmcmhphotos.com/photos/g4637-type-ii-dash-air-condition-modification.html>
Alternately people have installed a second evaporator, as the compressor and condensor are sufficiently sized, to augment the dash air. Some install these under the dash, the sofa, passenger seat, one even repurposed a rear unit from an old Chevy Suburban to the roof in the rear.
https://www.vintageair.com/builder-series/
<https://www.vintageair.com/builder-series/>
So my guess is that your compressor is not the culprit. All other suggestions have been good too.
Good luck and please keep us posted on your progress.
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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