You should listen to every single word from disel300, with his instructions i got 41F blowing from the center vents after 3 years of struggling in Houston heat with 70F blowing from the vents, and 55F after 8PM, i flushed with acetone, shop dry air, blow everything out, new seals, new expansion valve, switches, dryer.
yesterday it was 95F outside and my AC was blowing 41F at idle.
Thank you again without you that wouldn't be possible
Quote:
Originally Posted by tyl604
Apparently the problem is resolved. It was the viscous fan clutch. He tested it with a piece of cardboard and it completely stopped. Replaced it yesterday and instantly began to get 52F idling at high fan speed (I thought you were supposed to test at low fan speed) with pressures at 39F and 225F. While I know that is not perfect, it looks pretty close. I suspect he will get cooler temps from the center vent when the car is rolling.
Interesting aspect - says his condensor is painted black and he read that it would be 15% more efficient if he removed all the paint? What??? Assume in 1989 the MB engineers painted it black on purpose and designed around the inefficiency.
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