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#1
08-05-2007, 06:01 PM
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replacing the AC compressor on a 1980 450sl
The AC compressor makes grinding noises. When I disconnect a wire from the dryer, thus disable the entire air conditioning system, the noise goes away. I have serviced the system with R-134a and the noise diminishes but it is still audible. The clutch assembly is cracked and I'm relatively certain this is at least contributory to the noise. How do I access the compressor to change it when I can hardly touch it! I'm of course resolved that it must come out from the bottom. Must the radiator be removed? Any special tools required? Does anyone have experience changing a compressor on a 450sl?
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#2
08-08-2007, 03:15 PM
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According to AllData, the radiator has to be removed. It sounds like a terrible job, especially if you don't have a lift. The compressor and the carrier come out together. Since the compressor is US-made, many of the bolts are inch-sizes.
The book time to replace the clutch is 6.7 hours, plus 1.4 hours for AC service.
__________________
Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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#3
08-10-2007, 10:24 AM
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compressor replacement
Hi,
Be sure to flush your system and replace the rec/dryer. When a compressor fails it puts all kinds of debris in the system. Tony
__________________
 Tony HW111 280SE 3.5 Coupe Manual transmission Past cars: Porsche 914 2.0 '64 Jaguar XKE Roadster '57 Oval Window VW '71 Toyota Hilux Pickup Truck-Dad bought new '73 Toyota Celica GT
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