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  #1  
Old 10-14-2004, 10:44 PM
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Join Date: May 2001
Location: Florida
Posts: 1,105
a/c question-compressor blown?

sorry this isn't specifically benz related, but its a general enough question where it could apply to any car. Just for referance the car is a 96 integra. Basically air conditioning worked fine one day, and the next day wasn't working at all. I got one of the recharge kits, and sure enough the lower pressure side read zero. I was able to fill it up with the recharge kit, but only the right a/c vent got cold. About ten minutes later the compressor had cut itself back off, and the air went back to warm, guage red zero again. So, i figured i had a decent sized leak, and the freon with the red dye in it should help me, but i cannot find the leak anywhere. I smell nothing odd inside the cabin(which would lead to evaporator), and i don't see ANY leaks on any of the lines. I'm guessing i have an internaly blown compressor, does this sound reasonable to you guys? The car has 102k florida driven miles which is another reason i suspect the compressor, they seem to wear out first. thanks in advance,
Ryan
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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.
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  #2  
Old 10-15-2004, 12:18 AM
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Join Date: Aug 2001
Location: Evansville, Indiana
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Ryan:

Look on the high pressure side manifold on the compressor (assuming this is a Nippondenso) -- chances are the high pressure side o-ring seals eroded away and blew all the freon out. Compressor will be oily, and you need to replace the oil before recharging, or the compressor will fry pretty fast.

Other possibilities that aren't obvious are evaporator (look for red dye in the water drain under the car) and at the high pressure/hot side of the condensor, or o-rings in the high pressure side. I've seen hoses blow just past the compressor, where the pressure is highest and the freon is hottest. A leaking condensor isn't impossible either, look for oil at the sides and bottom. Some of the connections may be hard to see, poke around a bit. I had a big leak on the Volvo at an o-ring seal on the hot side of the condenser, hidden behind the grill mount. Obvious when I finally found it, the oil was bubbling on the fitting....

One side only cooling is pretty common on Japanese cars, I think, because of the evaporator design, when low on freon -- the airflow is separated in a such a manner that all the air going through the cold part of the evaporator goes out the right side. Only the part of the evaporator close to the expansion valve is cold.
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1972 220D ?? miles
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  #3  
Old 10-15-2004, 01:21 AM
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Join Date: May 2001
Location: Florida
Posts: 1,105
thanks psfred, i'll poke around some tomarrow. The darn bumper design of the car makes it very hard to see any of the condensor, so i'm going to have to remove the plastic splash guards.... These types of repairs make me miss the accessibility of my old SD...
Ryan
__________________
83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.
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