Thread: Glycol % in coolant

Originally Posted by rick130

Pat, which one do you use ?
The one with inhibitor (pink) or the diesel one (no inhibitor)

The one with the inhibitor has been known to cause a sludge like substance that floats on the surface of the overflow tank in some cooling systems.
I used to use Neo Keep Cool which also works very well.

The Water Wetter, Keep Cool, MoCool are surfactants with added inhibitors that break down the surface tension of the water to get better heat transfer.

BTW, any Redline product can be purchased through any Bursons store on the east coast.

From what I remember the sludge is due to the fact the surfactants are "cleaning" the inside of the cooling system.
Most of the dark sludge is aparently dead rubber from the inside of hoses plus other deposits picked up and also remnant glycol and the like from the previous coolant if it wasnt water wetter. This is supposed to disappear after a couple of changes.
I had the same thing with mine but the sludge only formed on the inside of the header tank, not in the radiator etc.
Turkey baster removed this and a quick topup to overflow it out of the top then drain it back to level with the access plug in the radiator.

Cheers

Andrew

Rick you put me onto redline products and I am sold.MTL in my fenders box,water wetter in the rad,my work tojo's all run RL oils in the tranny's.It is good gear. Pat