MarkBytes

Adding r12. Both valves are next to each other at driver wheel well. One valve is on thick pipe, one is on thinner pipe.

Which is low pressure side? (my system is low so can't tell the obvious way).

Thanks! - Mark

adrial

Err...on my car the low pressure side is under the car...driver side.

By the swaybar kind of...you can get to it without removing anything and with the car on the ground.

phlip

The larger diameter of the two pipes is the low side service port.

Danno

On the '86 cars, both high and low-pressure lines have a valve on the fender. The later ones moved the low-pressure line down by the pump.

MarkBytes

Thanks guys! I'll put my new IMACA (EPA) certification and Freon R12 to the test tonight. Gonna try to top up the Garage Queen in case warm weather ever hits Pennsylvania.

Thanks again for all the support. Now all I have to do is figure out an easy way to "jump" the Compressor clutch. Looks like there is a switch on the Evaporator that may be the low pressure safety cutoff (??).

RJP 951

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by MarkBytes:
<strong>Now all I have to do is figure out an easy way to "jump" the Compressor clutch. Looks like there is a switch on the Evaporator that may be the low pressure safety cutoff (??).</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Mark, is that so you can run the compressor and pump/pull the new R12 into the system?

I'm just an HVAC dummy trying to understand.
Ron

MarkBytes

Ron,
That's the "idea". Remember reading it somewhere....I'll know better tomorrow if it works. - Mark

Bri Bro

Just put some R12 into the system (low side) with the AC switch turned on, it will cut in as soon as it sees a little more preasure. If you bypass the low preasure switch, you will turn on the compressor with too little fluid, not a good thing.

MarkBytes

Project completed!

Added one can of R12, raised pressur in the system enuf to start compressor. Thermometer in dash vent registers 45 degrees.

If I still have "pressure" tomorrow, I'll be one happ camper. Bring on the sunshine!!!!!

For your info:
IMACA Certification = $15 1 hour read & test
1 Can freon - $20 (ebay)
1 R12 install hose kit - $4 (pep boys)
Install time on car = 1 hour