Anyone used the Mercedes Citric Acid Cooling System Flush 000989102511 ? - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 06-28-2015, 05:54 AM Thread Starter
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Question Anyone used the Mercedes Citric Acid Cooling System Flush 000989102511 ?

Hi all,

Need some instruction on how exactly to use the MB citric acid coolant clean/flush.

I have a clogged radiator and I would like to try to use this so I dont have to buy a new one, although I have a local company that can get me a high quality oe replacement for $120, not too bad but I get the dealer employee discount here @ MB so the acid only cost me $10.

Anyone know how to use this stuff? And can I use a concentrated amount to flush the radiator only?

1992 w124 300e - dd - ongoing restoration project.
2003 Ford Expedition 5.4L XLT - kid mover DD
1986 w201 190e-sold
1992 Accord sedan manual-sold
1996 vw GTI vr6 soooouped up-sold
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post #2 of 5 (permalink) Old 06-28-2015, 06:18 AM Thread Starter
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Found a post on this from another forum.

TO ANSWER MY OWN QUESTION:
**************************
Re: Citric acid

If you need to clean your cooling system first, here's the procedure courtesy of Len Sokoloff:

MB recommends a two step process:

1. First deoil the system - use Mercedes-Benz product specifically for de-greasing the cooling system. It is Part # A.001.986.21.71 a 500gram container of "trioxosilicate disodique pentahydrate" . Per the label - mix 50 grams per liter of warm water. Fill the cooling system, warm it up and flush VERY well. When flushing, fill the system up with clear water, get it up to temperature again and drain. Do this several times until you are sure it is all flushed out.

2. Decalcify the system - dissolve a pound of citric acid in hot water and pour it in. Get it up to temperature and thoroughly flush again. Citric acid can be obtained from most pharmacies or use MB brand of Citric Acid Powder, part # A.000.989.10.25 for 500gram container. (Yes - it's still available)

After you have thoroughly flushed the system and only residual water is left in the engine and heater, re-connect all disconnected hoses and close all drains.

Then add 8 ounces of Redline Water Wetter (to enhance coolant heat removal) and 6 ounces of water pump lubricant. Since you want NO MORE than 50/50 mixture of antifreeze and water, add no more than one half of the cooling system capacity of MB brand antifreeze. Don’t try to mix 50/50 in a container and expect to get it all to “fit” in your cooling system – there is always some water left in the engine block and heater after flushing with a strong stream from your garden hose. So the system will already have some water left inside, so add 40% to 50% of capacity. Top off the system with water, leave off the radiator cap and start the engine. As it warms up you may have to add more water to bring the level to the specified mark on the coolant tank. Check the level again after a day or so and top up as necessary with water.
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George Murphy

MBCA Technical Director

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1999 C43 AMG
***************************

1992 w124 300e - dd - ongoing restoration project.
2003 Ford Expedition 5.4L XLT - kid mover DD
1986 w201 190e-sold
1992 Accord sedan manual-sold
1996 vw GTI vr6 soooouped up-sold
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post #3 of 5 (permalink) Old 06-28-2015, 06:31 AM Thread Starter
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being told dish soap can be used to de-oil the system.... must be de-oiled before the citric acid descales.

fyi for other interested parties in the future.

1992 w124 300e - dd - ongoing restoration project.
2003 Ford Expedition 5.4L XLT - kid mover DD
1986 w201 190e-sold
1992 Accord sedan manual-sold
1996 vw GTI vr6 soooouped up-sold

Last edited by w124ak401; 06-28-2015 at 06:50 AM.
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post #4 of 5 (permalink) Old 06-28-2015, 10:15 AM
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I don't think deoiling is necessary unless you had headgasket failure.
I do all the cleaning flushes with distilled water.
Even I have good city water, DW at Walmart is 89 cents a gallon.

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post #5 of 5 (permalink) Old 06-29-2015, 07:48 AM Thread Starter
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Soudns good, didn't feel like doing all that anyways.

1992 w124 300e - dd - ongoing restoration project.
2003 Ford Expedition 5.4L XLT - kid mover DD
1986 w201 190e-sold
1992 Accord sedan manual-sold
1996 vw GTI vr6 soooouped up-sold
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