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#1
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Anyone have the thread on DIY coolant flush in 300D
I did a search and found pieces but remember reading step by steps on Coolant flush in a 300D...I got a couple of gallons of G-5 today at Napa store today and really need to get at it soon.
WHunter ? BC ? BHD ?
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'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..." |
#2
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Here's a few that I found.
Cooling system flush citric acid and the heater core. Flushing Radiator Want to flush coolant on SDL If you have any other questions, just post 'em. |
#3
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1) Can I do a flush without having to do a citric acid flush? Tha sounds like an all day affair and my temp gauge for coolant has been at good low temps ,
although IDK when the last time the coolant was changed or flushed by any PO's. I've had her for 1 yr now this month.
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'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..." |
#4
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Quote:
Then, when all the water is clean.........just let it all drain out and close it all up. Refill with a 50/50 mix of Zerex G-05 and distilled water. Don't forget to take off the upper hose and fill it as much as you possibly can. |
#5
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Quote:
If I flush the heater core do I need to plug the radiator back up so there are not 2 openings?????
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'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..." |
#6
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Quote:
You can leave the radiator drain open. In fact, you will probably get better results if you pull the lower hose, otherwise the radiator is going to fill up and overflow because the garden hose will flow much more water than the radiator drain can handle. |
#7
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Brian summed it up pretty well....a proper citric acid flush is very time consuming and may take 2 days to complete all the steps...down in Sunny Florida you don't have the freezing temps we have to think about ....if it needs a citric acid flush its going to show up as high temps up long mountains that you don't find in your area, or on the hottest days of summer.
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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 Last edited by boneheaddoctor; 01-08-2006 at 09:46 PM. |
#8
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If the coolant is clean and you haven't been having any temp problems, then you can likely get away with just a flush and fill as indicated above. But should you decide to do a citric acid flush, check the manual because I'm pretty sure it is quite clear that a deoiling must be done before doing a citric acid flush whether there is evidence of oil in the coolant or not.
Len |
#9
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Thanks, much all.
I got the prestone T flush kit today at AdvanceAP and it's on the list.
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'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..." |
#10
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You don't want to follow these instructions. Remove it and put it away for another couple of years. |
#11
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I just read the instructions and it says to cut my inline hose and install the T in the hose away from the engine heat like midway..... Do I have to cut my hose? I wouldn't want to cut my hose unless I was gonna replace it after the flush. any alternatives withthis???? aa
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'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..." |
#12
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Splice in an extra hunk of hose temporarily.
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Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE |
#13
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Quote:
What size hose is this going into?? The inlet hose. aa
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'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..." |
#14
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I would just be making a guess without measuring it, but, as best I remember, 5/8 is close enough to work for this purpose.
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Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE |
#15
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I would like to do a quick coolant flush while I am replacing the water pump on my 240. The block drain is the 19mm hex hed on the right side of the engine just above and forward of the starter right? How much and what kind of coolant should I fill it back up with? Thanks. -Bryan
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine |
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