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#1
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Leak at plug in back of R4 compressor
The plug that fills the hole in the back of the R4 compressor used for the high pressure cutout switch in GM applications has started leaking in my car. At first I thought that was an easy enough fix, remove the snap ring, pull the plug, replace the o-ring, install the plug, and then the snap ring. After looking at the plug a bit more I can't seem to figure how out to grab hold of it in order to remove it. Does anyone have experience with removal and replacement of those plugs?
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'82 300D - Light Ivory, 2nd Owner (Back in the wind April 2013!) '95 E300D - White, grey interior. (Suffering from stuck/broken glow plugs) Deuteronomy 22:4- "Thou shalt not see thy brother's ass or his ox fall down by the way, and hide thyself from them: thou shalt surely help him to lift them up again." |
#2
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Hate to say it but here goes.
The best way to repair this is to replace the compressor. Option 1 - get another R4 from CompressorWorx but it is still a crappy R4. Option 2 - Search for rollguy on this board for a Sanden conversion kit. Much better compressor.
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The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#3
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step one, remove refrigerant from car.
step two, remove circlip from compressor. step three, pressurize the system until plug shoots out like cannon ball... step 4... find cannon ball..., replace o-ring, and reinstall with the circlip... step 5, grumble and replace the compressor...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#4
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Quote:
The compressor works just fine and the leak is small but it is leaking so I am going to take care if it before my R-12 stash runs out. Not sure why a leaking o-ring around a non-functional plug would automatically mean the compressor is shot. My biggest concern is accurately measuring how much oil comes out. If in doubt I'll just flush the whole system and put fresh oil in. This weekend I'll take it over the shop and give it a whirl. Pictures to come.
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'82 300D - Light Ivory, 2nd Owner (Back in the wind April 2013!) '95 E300D - White, grey interior. (Suffering from stuck/broken glow plugs) Deuteronomy 22:4- "Thou shalt not see thy brother's ass or his ox fall down by the way, and hide thyself from them: thou shalt surely help him to lift them up again." |
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