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1983 240D Coolant Flush
I know there are already a million threads on this topic, but I can't seem to get the jist. Can someone give me explicit, step by step instructions on what to do? I'm not doing citric flush, just getting all the green stuff out and replacing with g-05 and t-stat replace. There are three bolts it seems: radiator, engine block, and block heater bolts from what I read. Which ones do I remove? How do I properly "burp" the system? I was told to run the engine up to operating temp and let cool all the way down with radiator cap off.
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1983 240D 3.0T 4-speed manual, now sold 1989 Subaru GL Wagon 5-speed Touring Edition |
#2
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I followed the tutorial over @ Dgiant. The whole procedure went smooth as silk. I recommend doing what he says in regards to removing the hoses and flushing. After running the "Shout" through, lots of orange crap came out. Especially out of the heater core hoses.
I opted NOT to do the citrus flush. I also did a complete fresh water flush 2 times (removing the hoses and flushing with fresh water every time). I did all the above with my old rad. Then replaced the rad. after the flush was complete. The job was really easy but a little time consuming. It was a PITA to remove the hose down behind the oil filter and I had a hard time pulling the "block drain" without getting scalded with hot water. If you can get in the right position it is cake, just be careful. I had no problem with "burping". If you have the problem you can put the car up on ramps or go for a quick drive and re-fill. You are correct about filling and watching with the cap off. Just watch your engine temp. If the water/coolant starts to lift out... You waited too long.
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AJ 1985 300D (SOLD) |
#3
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If you follow the advice of MBZ, you don't need to remove the block plug or disconnect heater hoses: Open heater controls to full heat, drain the system at the radiator drain, remove the thermostat, close up the thermostat housing (2 o-rings to make a good seal during flushing), close the rad drain and fill the system. Let it get to op temp or close to it (about 2500 RPM) - this takes time as the thermostat is out - and continue running for 10 minutes. Drain, refill with engine running, and repeat the process. When finished, replace the thermostat with a new O-ring and fill system.
Burping is done by parking the car nose-high and removing rad cap.
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Don't Chrome them; polish them |
#4
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Quote:
And I read that the big crap can't get out the radiator plug, only the block plug. I think I might follow the dieselgiant one, unless anyone gives me reason not to.
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1983 240D 3.0T 4-speed manual, now sold 1989 Subaru GL Wagon 5-speed Touring Edition |
#5
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Quote:
After driving the car a few months, the "expansion hose nipple" on the radiator broke off (common problem). Before I replaced the radiator I followed Dgiant's tutorial. I honestly could not believe all the crud that came out. I'm sure a lot of it had to do with using the pressure from the garden hose. It is worth doing. Yes... With the engine running.
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AJ 1985 300D (SOLD) |
#6
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I don't have the 616 FSM, but the 617.95 FSM absolutely specifies that the crankcase plug should be removed. Doing so is incredibly beneficial. Doesn't it seem a bit strange that MB install a drain plug and then recommend that it not be used? |
#7
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Quote:
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1983 240D 3.0T 4-speed manual, now sold 1989 Subaru GL Wagon 5-speed Touring Edition |
#8
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#9
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Well I drained the green stuff and flushed it 6 times with fresh water, which seemed like a lot. The first couple times I forgot to turn on the heat though. Now, though, I've managed to lose the block bolt washer gasket in the engine compartment because I dropped the whole bolt when taking it out. Solutions?
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1983 240D 3.0T 4-speed manual, now sold 1989 Subaru GL Wagon 5-speed Touring Edition |
#10
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It is probably laying on the top of the crossmember. If you cannot find it, a 14 mm drain plug seal should be easy to find at the typical auto parts store. (Reusing an old seal is not a great idea in the first place.)
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#11
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I recently flushed the cooling system on my car and actually found no seal on the drain plug. I reinstalled it as it was. Hopefully, it won't leak but the odds are against me.
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1983 300 Turbo-"Nora" 1983 240D Auto "Lucia"-slowest on earth-1st love 1985 300 Turbo-Blue Goose-slowly plucking parts http://i117.photobucket.com/albums/o...ly15/mbsig.jpg |
#12
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Alright, anyone else have input on this? Can I just put it in without one? Can I just get a replacement?
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1983 240D 3.0T 4-speed manual, now sold 1989 Subaru GL Wagon 5-speed Touring Edition |
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