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#1
10-20-2004, 02:00 PM
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How to Flush the Oil Cooler?
I'm still working on swapping the engine in the 300D . . . the service manual suggests flushing the oil cooler and lines and anything else that may have been exposed to the oil in the seized engine . . . for fear of metal shavings I assume. What should I use to do this? Not water, right? Maybe some horribley caustic chemical?
Thanks, Eric '71 220D '81 300D 
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#3
10-20-2004, 02:51 PM
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If you can get the cooler off the car it will be easier too.
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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#4
10-20-2004, 06:20 PM
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Like kmaysob suggested use diesel. With the oil cooler still in the car attach a transmission funnel to one oil cooler hose end with a piece of hose and hoseclamps. Put the other oil hose end into a container. Empty 1 gallon milk jugs work nicely. Pour diesel through the hoses/cooler to flush it. Suggest backflushing in the opposite direction to oil flow. When you are done use compressed air to blow out any remaining diesel/oil to clear the lines. Recommend you empty the catch container before using the compressed air or you will have a mess. RT
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When all else fails, vote from the rooftops! 84' Mercedes Benz 300D Anthracite/black, 171K 03' Volkswagen Jetta TDI blue/black, 93K 93' Chevrolet C2500HD ExCab 6.5TD, Two-tone blue, 252K
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#5
10-20-2004, 08:14 PM
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Man oh man be careful. It the oil cooler lines have never come off before they will in all likelyhood be siezed on the aluminum threads of the oil cooler. Once you take off the old oil cooler lines the resulting threads are usually shot. You can do it if you are mighty careful but why bother? Just change your oil every 1000 miles for a few months and your done. (my .02)
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Orland Park, IL 1985 300SD 215,000 miles
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#7
10-20-2004, 09:06 PM
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Quote:
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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