Re: CLR to clean out Engine Waterways

Posted by BigKev On 2010/12/3 13:06:30

If the head(s) were still on the motor, I would be concerned what the lye may do to the head gasket(s). I also find that while lye based cleaners works great for cleaning out thick deposits of gunk and grim and things like that on parts, but the metal will quickly flash rust afterward if not completely rinsed clean and force dried.

I dont think lye is a good choice on aluminum.