A/C charging

[Kap142]

I'm sitting here looking at the south end of my A/C compressor trying to determine which is the high pressure side and which is the side I actually charge. It's a factory unit on a 72 BB. Can anyone offer an easy answer?

 

[irfgt]

The larger hose is the low pressure side and the one you use to add Freon.

 

[Kap142]

Awesome

Now that makes life so much easier.

Correct me if I'm wrong. Start the motor. Turn the A/C on high and charge away, keeping the can up right of course.

Ken

 

[ADulay]

You found Freon??

Cool! (sorry, couldn't resist)
AD

 

[Kap142]

well kinda

It's a product called Freeze 12

 

[zzzona]

It's a product called Freeze 12

I have not heard of this freon. Is it compatible with R-12?
You should really have some gauges on the system or be real careful not to overcharge. The high side(condenser) runs under alot of pressure. With the engine running have the RPM's at about 10 to 12 and " IF " you had a guage on the low side it should read at about 35 lbs. It would be about fully charged at this pressure (low side is large line going to evaporater)..The high side will run over 200 lbs.so that is the one you don't want to blow. ...Also some of the old cars have a sight gauge. I am not familiar with your vette. You can charge it until the bubbles run clear.....or no foaming
and this would be a full charge.......

 

[Kap142]

Only a little confussion

Confirming the low side is the line running from the compressor to the evaporator (with the sight gauge)which then runs to the condensor?

My large line is foam wrapped and seems to head into the cab of the vehicle.

Can't afford to make any mistakes on this, would rather ask twice.

Ken

 

[zzzona]

Sounds like you got it right............The low side fitting should be close to the evap. near or on the accumulator.( silver cylinder,or can)...........

 

[Kap142]

and away we go.

Thanks just wanted to be as sure as possible

Ken

 

[ADulay]

It's a product called Freeze 12

Hey, thanks.

I've got one car left that still uses Freon and it was giving me fits trying to find a decent replacement for Freon and make the switch to R134.

AD

 

[Kap142]

This product is......

Called freeze 12. It is available at Bumper to Bumper Auto Parts at about $15 a can. Be warned that all fittings are R12 fittings so a bunch of "adapt this to that" will be required.

It is said to be totally compatable with R12 as a top load.

A NAPA dude said its like 75% R134 but works on both systems.

Jump on the internet and see what it says. Good info

Hope this helps

Ken:thumbsup:

 

[Kap142]

Bumper to Bumper

Carries Freeze 12 at about $15 a can. The problem you may run into is that all fittings are the old R12 fittings and finding connectors and such for both the can and compressor is a pain in the arse.

 

[zzzona]

Yeh.. they used to be easy to find a few years back. I have some laying around my garage somewhere...Post up when you get the system charged and let us know how the FREEZE 12 works..........