What is the proper coolant fluid for my 1982 Turbo Diesel? Also I would like to do a coolant flush. I was reading up on the citric acid one and I would rather not have a problem develop from me making a mistake. Is there a way to flush the system with just water?

Also where can I find the proper amount of coolant that I will need when I do change the coolant fluid?

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1982 300D Turbo

Either MB coolant or Zerox G5 or whatever its called. I don't know what the fill is on a W123, but its probably about 10ish quarts. It does list it in the back of the owners manual.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Zerex G-05.

1.Find the radiator drain plug...drain the radiator.
2.Find the block drain...(If it has one)...drain.
3.Close both drains...fill system with H2O(Follow your model's "Burping"
procedure...No Air Pockets!).
4.Run engine until warm with the heater on ,so that the heater core is rinsed...and then 30 mins.

Repeat 1,2,3 and 4 three to five times( all you're doing is "rinsing" the system
that's why you have to do it so many times!)

Drain system final time ...close valves ...fill with a 50/50 mix of Zerex G05 and
DISTILLED water...
"Burp" the baby.You're done.

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'84 300SD sold
124.128

I currently have Zerex radiator cleaner in my system now. It is non-acidic so i will not hurt anything like the citric acid could. I have to drive it for 3 to 6 hours and then drain it out and re-fill with coolant. I got a gallon of Zerex G-05 coolant at NAPA for 12.99.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

The MBZ maintenance library for the W123 says you may use water for flushing, but baking soda is recommended w/the water. They don't say how much.

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Don't Chrome them; polish them

I have a few questions.

Where is the MBZ library? I also have seen a great diagram of where the drain bolt is on the engine block does someone have the link. It also described the easiest way to get to it.

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1982 300D Turbo

Plain water isn't going to remove anything, sadly, especially rust or calcium deposits. The flush you are using probably contains EDTA, which will at least remove some of the rust and calcium, if not all of it.

Best to use the citric acid as directed, with a thermostat wedged open or the proper tool (one that does not close). Total time with citric acid in the system is short, you aren't supposed to drive around with it in there, and if you have even minimally hard water, a couple rinses will take care of it.

Use only MB coolant or Zerex G-05, anything else won't prevent the aluminum parts corroding. Not a problem for you, particularly, as the only aluminum parts are the water pump and thermostat housings/hose nipples, but for those of us with aluminum heads, it's vital.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

Well I looked last night also, still no luck with those great pictures. I know it showed the car up on a jack with the rim off and turned.

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1982 300D Turbo

Drain plug pic:

Coolant Drain Plug

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05 E320 CDI - 175K miles
82 300D - 200K miles (sold)

Also:

http://www.peachparts.com/Wikka/OM617BlockDrainPlug

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05 E320 CDI - 175K miles
82 300D - 200K miles (sold)

Thank You, those are the pictures.

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1982 300D Turbo

I looked in my haynes Manual and see nothing on burping procedure. Can someone give me the steps needed?

Also when flushing the radiator where to I put the water thru the expansion chamber?

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1982 300D Turbo

When I removed the engine block bolt it had no washer and when I removed the Plug underneith the radiator it has a destroyed O ring. What are the part numbers/names and a source for these parts?

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1982 300D Turbo

On one of my cars, the washer was there; on the other, it was absent--no problems with leaks on either one. Sorry, can't help with other questions...

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1980 300D (non-turbo, 421k miles)
1984 300TD (turbo, 305k miles)
1985 Vanagon (170k miles)