Automotive Air Conditioning Information Forum (Archives)

efxengr on Sat August 04, 2012 12:04 AM

Year: 2000
Make: Ford
Model: E-250
Refrigerant Type: 134a

What are the effects of too much oil in the system? Coating of heat exchange surfaces? Slugging compressor? High pressure due to incompressible oil? I'm helping a friend with a/c on E-250 van with hose leak. He's been topping off with cans over and over and it just seems like there's a lot of oil in the system.......oily, green. But, when I measure what is in the hose its about an ounce to an ounce and a half. I blew through the evaporator with nitrogen (30psi) to see if it was clogged.....no gurgling, a little spray, same green oil residue.

TRB on Sat August 04, 2012 3:51 PM

You pretty much answered you own questions.

Coating of heat exchange surfaces? Yes
Slugging compressor? Yes
High pressure due to incompressible oil? Yes

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efxengr on Sat August 04, 2012 5:38 PM

efxengr on Sat August 04, 2012 5:41 PM

what a mess.