NOT JUST FOR SHAVING
Many cylinder heads have corrosion in the water jackets that can’t all be blasted or blown out. Marine engines can be the worst. When assembling an engine, to make sure you don’t accidentally drop any loose scale in the bores, simply pump shaving cream foam into the water jackets of the head. It won’t affect anything and will evaporate off or rinse out. For guys sending heads out the door that have a corrosion problem, tape off all the water jackets for transit. The tape will grab any loose flakes. Instruct the installer to do the shaving cream trick. Some applications require some excessive handling to get the head on the block and this will save you from shortblock contamination.
North Branch, MN