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Can't find leak

Selkirk on Mon April 29, 2013 11:06 PM User is offline

Year: 2004
Make: Chevy
Model: Suburban
Engine Size: 5.3
Refrigerant Type: 134-a
Country of Origin: United States

Tools used:
Vacuum pump-Robinair 15500
Sniffer-Inficon TEK-MATE
Dye-Tracer Line
Fluorescence glasses
Light-Optimax JR

Ok guys-I could sure use a little help tracking down a hard to find leak.
My 2004 Suburban with rear air leaks refrigerant out in about two weeks or so.

I pulled a hard vacuum and it held for a couple of hours. Did a recharge and it leaked out in about two weeks or so.

Added dye and went from head to toe over it during daylight and night. Looked real hard on the line running from the front to the rear air and turn it makes back into the truck. I think I cover all spots(lines,condenser,dyer,etc) but the compressor was tough to see all around it. No leaks found.

No leaks found with the sniffer. Worked the air vents over pretty well trying to see it the evaporator was leaking.

At this point I'm thinking it's the compressor shaft seal only leaking when it's running. Or maybe I'm not finding a evaporator leak.

Any help on known trouble spots or tips would be great help.

Dougflas on Thu May 02, 2013 6:51 PM User is offline

Put freon in it, remove Vee belt, and place a plastic bag around the compressor. Come back the next morning with your Tek-mate and stick it in the bag. You will find your leak if it's the compressor.

By the way, Inficon has a new updated more sensitive sensor for the Tek-mate. Part number 703-020-G1. It is the same part number as before but is packaged in a blue package instead of the white package. This will increase the Tek-mate's sensitivity. The Tek-mate is my first detector I go with. Very reliable if you use it correctly.

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