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Originally Posted by Riveted1
Very nice! How's it working?
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Awesome. The only thing I need to do is find an idle compensator for my aftermarket carb. For now if it starts to stumble at a stop light I just turn the compressor off with the fan switch.
I've heard and read that older (designed for R12) condensers don't work well with R134a. And it is looking like the 90+ degree days are not going to happen any time soon but for the 80s I've seen here since I got it working Friday night it works perfect.
Quote:
Originally Posted by jbclassix
Dude! This is the gold mine I was looking for! I am getting ready to put a Sanden on a 73 Pontiac Ventura with a POA! I have been wracking my brain for weeks!
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If you plan to switch your POA system over to R134a like I did, you need to adjust your POA like in the link I posted.
I don't know if I would convert another non-AC truck to use an all stock 67-72 AC system. If you got more money than time a $1000 - $1500 aftermarket kit might be the way to go. However for the $350 I have into it I guess it was worth my time.
If you already have a truck with all the stock AC components I would definately re-hab what you have.
Here is what you'll need...
AC Suction and Discharge hose ($95.00 P/N 138514 at GMCPauls.com)
AC Expansion valve to drier hose ($21.95 P/N 273623 at GMCPauls.com)
Replace ALL the o-rings in the system ($4.65 P/N CP3011 at Ackits.com)
Get a new expansion valve. ($16.50 P/N 38652 at RockAuto)
Flush the compressor with R134a compatible oil. ($28.69 for 1/2 gallon P/N 41-50062-64 at Ackits.com)
You need to flush the used compressor with this oil two or three times. 1/2 gallon is enough to flush the compressor and fill the system with the required 11 oz. when you're ready to button it up.
O-ring/thread sealer ($9.49 P/N RT201B at Ackits.com)
Flush the evaporator and condenser with mineral spirits. ($15 at hardware store)
New receiver/dryer ($9.64 P/N 33215 at RockAuto)
That is $200.92 if I did my math correctly.
After all the o-rings are re-habbed and all the parts installed, pull a vacuum. You need to get down to -28 to -30 in. Hg. Once you get there you want to close the valve on your gauge set and leave it sit for at least 30 minutes. If you still have the same -28 to -30 as when you shut off your vacuum pump you're good to go.
I had a couple of cans of R134a in my shop. I picked up two at Wal*Mart for $22.62 including MN sales tax. You need three.
I paid $100 for all the AC stuff off a junk truck except the condenser which I got off a junker da-burb was parting. If I remember right that was $35.
You're looking at $225 if you already have all the stuff on your truck. $350 if you have to convert a non-AC truck with junk parts like I did.