I didn't want to jack infomaniac's plumbing thread. But I have a Q?. SmokingSS mentioned steam pockets, and yesterday at idle, I had steam coming out of my dump line at idle(only), yet the temp gauge never hit(over) 190*. I'm thinking the back of the block must have been hotter than the front(where the sending unit is). My intake has 2 holes(in the back) that are just plugged,where/how should I plumb those? Or am I way off here. Fwiw I ran it an hour or 2 with the temp gauge 120-130 ish(and it still steamed at idle) but at that temp I couldn't get my oil temp over 190*.