A/C leak detection
 

Any tricks? System seems to hold pressure on the low side with the engine off but loses it when the system is turned on, so I'm guessing a high side leak? It's hard to hear a leak with the fans on and engine running.

dye

Is that it, or is there a way to hook it up to compressed air and look for a hiss?

I've seen other techs use leak detectors. The one we have at the shop is really touchy and I never use it, i'd rather use dye unless its a larger more obvious leak. similar to these (ours is really old) http://www.amazon.com/s/?ie=UTF8&key...l_5ka58bgawy_e


The main problem I could see with using compressed air would be the moisture you would let into the system. Unless you can vacuum it out for a long period of time you may create more problems.

no. dye or an ac sniffer

I've never found an a/c sniffer that is accurate.

If you can see all the areas that the high and low pressures line bolt to that will use o-rings to seal you can try spraying windex or some sorta of soapy water to see if it bubbles otherwise dye is the best.

You can also have a cracked evaporater and be leaking in the heater box sometimes you can see dye where the drain tube would leak out to.

Dye it is. Thanks fellas.

what are your running numbers on the low and high?

Dye or a sniffer is what I do.

Put the Dye is and then use the A/C, go for a ride and really let the A/C run. after your drive look for the dye. Mine is leaking out of the A/C compressor out of every nook in the casing itself. and it is super obvious and easy to see. if its leaking in a tight spot a blacklight might help

Black light and yellow tinted glasses you get in a kit and it will be clear as day

x2 ...

Didn't even get that far. It's the A/C box itself.

A/c box ?

Talking about the evaporator? Curious

Pictures or anything

I'm guessing evaporator?

Yeah, that's what I meant.

http://i211.photobucket.com/albums/b...eaterbox-1.jpg

Not my car, and this is hacked up, but the dye/oil is leaking on the heat sheild near the toe pan.

Glad you found it.

Not sure if that only houses the evaporator or not

Think that is your tev (thermal expansion valve) where the connection is made might also have a connection inside

Just remember follow the leak from the highest point

No, it has a motor. This pic is not my car, just a good shot of the area.

Yeah I fixed it and edited haha

Not your car but still a 4th gen like in the picture ?

Yes. 1995 Trans Am.

I might have an evap for you out of a 99

Let me know if you do. I need to check compatabilitiy, too.

check it I'm 99% sure I still have it

Its not that bad to do. I used to have a couple but I think I scrapped them.

I have one from my 95