Probably good I'm changing this... How does this happen? It looked like yellow battery acid foam crust in one of the dead end triangular indents on the timing cover face behind this mess. Water outlet ate its face off, beyond resealable, thankfully intake manifold could be made flush again. When I got the van it looked like 90% water, 5% rust, and 5% dex-cool. Flushed all that out and went 50/50 conventional green once I got home.