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#1
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compressor o-rings
I'm replacing the Nippondenso Compressor (10p17c) on my '87 560sl and realized that I need new o-rings for the suction and discharge fittings. Wanted to finish the job asap, and just went out and got new o-rings that are dimensionally the same as the old ones. Will this do or are the Mercedes o-rings special? If they are, where can I puchase them?
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#2
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if they are demensionally the same, made of appropriate material, have the same compliance and heat tolerance, then they will probably work.
if you wish the appropriate part for sure, I might suggest the MB dealer. You will be surprised on the cost of those o-rings but it will be hard to be sure otherwise.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician |
#3
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Depends on refrigerant...
Hi there,
The answer really depends on what refrigerant the car uses. If it is using R12, the neoprene O-rings will be ok, as long as they are an appropriate size. If you have R-134a, they will leak. The molecule size of R-134 is much smaller, and with new O-rings there will be no old oil to plug up the microscopic holes in the O-ring's rubber, allowing the R-134 to pass through. R-134 requires barrier hoses and special O-rings to keep leakage down to an acceptable level, when using new parts. Old hoses seem to work ok without excessive leakage because they are saturated with a surface coating of oil. Most R-134 conversions seem to require yearly "topping off", if they last a year. This is because the molecules of R-134A can and do pass through the rubber of the O-ring seals and hoses. Richard Wooldridge '82 300D/4.3L V6 Etc... |
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