ArmitageGVR4

iTrader: (13)

Many people here have noticed that gray scum builds up in the coolant overflow bottle, purportedly from exhaust gas blow-by, even in healthy motors. I've removed my coolant overflow bottle for the purpose of cleaning it out thoroughly. Any recommendations on the best way to clean/break up this gunk? I was going to fill it with warm water and simple green and just shake it till the cows come home and see if that works, but if someone has a better alternative (brake parts cleaner? gasoline? ...?) I'm all ears. Thanks!

bajaman

I did this when I rebuilt my engine. Took out the tank, filled it about half full with hot water, added a half-cup of bleach and a half-cup of CASTROL SUPERCLEAN, and a good squirt of DAWN dishwashing liquid. Shook it around, let it sit for a few hours, shook some more, let it sit again, shook it again and then let it sit all night.
Damn thing came out absolutely looking like brand new!

Sled Driver

iTrader: (9)

I removed the container, got some pea gravel from my walkway & added waterless hand cleaner.

I covered all the holes with my hands & shook the hell out of it for a couple of minutes. Dumped the whole mess out & rinsed it out with water.