PeachParts Mercedes-Benz Forum - View Single Post

LUVMBDiesels · #11 08-26-2010, 10:33 AM

Lots of posts on how to do it.

http://www.peachparts.com/shopforum/search.php?searchid=5146920

Basically you drain the system, rad and block, then fill with water and put in some Tide detergent, Run the car for a few minutes and then drain it again,. Flush it with running water - I made a back flushing gizmo with some 1/4" galvanized pipe, a ball valve, and a hose barb that I attached to the block drain. I also took out the thermostat and disconnected the wires to the mono-valve so it would stay open.

After about a 10 minute flush I let it drain and the poured in the acid mixture. I forget the ratio, but I think it is 2.5 pounds of powder mixed in hot water and poured into the tank. Fill the system with water and run the car for 1/2 hour or longer.

Then FLUSH FLUSH FLUSH FLUSH

Once it is clean and the water no longer feels slippery, flush it one more time and let it drain completely.
Then fill it with the right coolant mixture.

Hope that helps