Is there a citrus flush or should the original quesiton have been about a citric acid flush?

The archives are in sore need of an index. Until someone volunteers, search is the best you can do if you don't like to hear people to tell you to search :/

Sixto
87 300D

We do have an index:

http://www.peachparts.com/shopforum/forumdisplay.php?f=82

Where the heck have I been? That's wonderful!

Point remains - if that's not sufficient, take the initiative and build an index that works for you because it will definitely benefit others.

Sixto
87 300D

Thank Roy for that. It's all his work.

If you find a valuable thread that belongs in the index, please let Roy or myself know about it.

The index is the secret of the forum. I don't know how to publicize it more...........

so all of you guys are going to clown him for asking how to perform a citric acid flush, and then you are going to hijack his thread. Whats the point?

Citric Acid flush, is useful for dislodging particles, but do you really want to run that through your water pump. If yes, then go from there.

Dump coolant, recycle it. Put in water and citric acid, run it for a little while, then dump it out, recycle it.

Flush, and then put in MB coolant with distilled water.

contact rusty cullens at buymbparts his thread has a good write up on it over there. It seemed like there was a big debate about 3-5 years ago here on mercedes shop as well.

I hope that this has ACTUALLY helped you

__________________
Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.

A citric acid flush is used for dissolving scale, not dislodging particles.

I recently descaled my euro 84 300TD turbo. It had enormous quantities of built up scale, really staggering.

A few weeks later, I removed the waterpump to inspect the impeller for wear (it was still running hot). Believe me, nothing was going to hurt that iron impeller.

The basic procedure is:

1) drain coolant (radiator and block drains)
2) remove thermostat
3) degrease cooling system with a detergent, flush with clean water
4) descale with 10% citric acid, flush with clean water until no acid residue remains
5) flush with distilled water
6) install new, tested, thermostat
7) refill with appropriate quantity of approved coolant (undiluted), fill with distilled water to correct final volume

There is alot more information behind the scenes of what I've just described, e.g. "flush" means filling the system and driving it to get it up to operating temperature. The correct procedure is described in the factory service manual. If you want to do it without the FSM, you really will need to search the archives.

about 2 weeks ago, I added to the stickey about getting the most from your post... with a link and an explanation of the google search...
if anybody reads the forum help stickey...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Those two, dissolving scale, and dislodging particles is the same. When something dissolves, it creates particles. LOL.

I highly, highly doubt that everything will dissolve instantanously. So if some big chunk is floating around the cooling system while you are warming up the car/driving it, that could cause a problem.

__________________
Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.

Um, no. When something dissolves, it goes into solution.

True that "chunks" of scale may dislodge. True that they may clog small passages (e.g. radiator), but only temporarily as they too will dissolve. No way will they damage the waterpump.

We're talking about flakes of carbonate deposits in a rapidly circulating hot acidic environment. They won't last long, nor do they have the structural integrity to jam the waterpump.

Can't we just link the forum's search button to google primed to do a domain search? Or better yet, take the submitted search string and format up a google search URL from it?

__________________
'83 300DTurbo http://badges.fuelly.com/images/smallsig-us/318559.png

Broadband: more lies faster.

What about the deposits prior to 80 degrees C? Have you performed this before? I have seen some bad results before. Maybe the thing to do, would be to boil the water first and then add it to the car HOT.

__________________
Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.