<VV> A/C For 69 Corvair

Harry Yarnell hyarnell1 at earthlink.net
Tue Jul 13 16:26:13 EDT 2010

I have been taught that the main reason to evacuate an A/C system was to 
purge the air and moisture out, so there was just pure Freon in the system. 
How can it work with air in the lines?

Harry Yarnell
Perryman Garage and Orphanage
hyarnell1 at earthlink.net
----- Original Message ----- 
From: <corvairduval at cox.net>
To: <virtualvairs at corvair.org>
Sent: Tuesday, July 13, 2010 2:49 PM
Subject: Re: <VV> A/C For 69 Corvair

I'm sorry, but the phrase "no vacuuming of the system is necessary" makes
no sense to me. The vacuuming is to remove the moisture that entered the
system when it was open. This moisture can freeze at the expansion point
(small orifice) and cause the system to not work properly. The moisture
will also allow internal surfaces to corrode if not covered in a layer of
non-hygroscopic oil.

Sound like a really bad idea to me since vacuuming a systemis so easy.

Step 1. Find old refrigerator in alley or dump with good compressor...

Frank DuVal

Original Message:
From: Bill H. gojoe283 at yahoo.com
Date: Tue, 13 Jul 2010 10:22:54 -0700 (PDT)
To: virtualvairs at corvair.org
Subject: <VV> A/C For 69 Corvair


Joe: You found the right place for your question. I just finished (last
installing Clark's A/C kit in my 69 Monza.

Feel free to ask me any questions. It took 9 days and lots of blood
(literally), sweat (very literally) and some tears but it's finally in and
working (but not 100% complete).

There is no need to remove the washer mouting, but the tank does slide out
you can get better access for your drill to open the holes. I also had to
remove the wiper motor mouting screws (but not actually take the motor out)
again, for drill access to make the evaporator mounting hole.

The drawing (not the photo) gives you a better perspective of exactly where
A's holes need to go.

By the way, I found Clark's instructions to be confusing and the pictures
poor. If you google "classicauto air" on the Internet, you'll see what
instructions look like. For the price of the kit, the instructions should
be of
a much better quality.

I used the 66-67 style condenser in my car since I don't have the skill to
big openings in the trunk. So far, the system does work.

Also, I used "EnviroSafe ES12" instead of R134a. I had used it
successfully in
my (former) 72 Dart Swinger after my mechanic had to disassemble the A/C
plumbing. The ES12a is non-corrosive if it contacts moisture, therefore no
pull-down or vacuuming of the system is needed before charging. It's legal

Let me know if you have additional questions on the A/C install...Bill
Hershkowitz 69 Monza 110 PG

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