[stev]

I sure don't like the looks of the white frosting in your cooling loop. Once there is air in the lines, this white stuff is like a powder that has coated everything.

This powder coats more than just the plastic too. I have a Danger-Den cold-block with this stuff on it. The white powder coated the entire copper cold-block inside base surface. Would this hinder thermal transfer from the copper block to the coolant? It could from the looks of it. Once a person flushes the cooling loop, this white chalky stuff appears when the air is introduced.

This white chalky power is not friendly to pumps with bearing shafts either.

RoboTech and I have tossed around questions regarding this mystery white chalk powder issue in the past.

Stev