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a/c outside air mod [message #321183] Thu, 27 July 2017 11:46 Go to next message
Wayne is currently offline  Wayne   United States
Messages: 106
Registered: August 2004
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Senior Member
I am doing the outside air mod on my 76. I am concerned about the max air door.
Even if I move it manually it doesn't close all the way in either direction.
Is this normal? Also I have owned this Birchaven sense 2003 and have never used heater or defroster and will never ( on purpose ) use it in the future. Can I just block this max air door in the full cold position without compromising anything except the heater and defroster?


Wayne Lawrence
76 Birchaven
Bellflower CA
w.lawrence@verizon.net
Re: a/c outside air mod [message #321186 is a reply to message #321183] Thu, 27 July 2017 12:36 Go to previous message
Steve is currently offline  Steve   United States
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
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Senior Member
I like to also block any potential heat by adding a manual shut off valve to the heater core. I have done this with many older vehicles where the heat seems to bleed through in the summer time.

1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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