[usmma2013]

I cleaned the bleed holes, replaced water deflectors, cleaned water passages etc. The head gasket is brand new.

I ran the motor again today and the hot head ran much much cooler. I could hold my hand on it for 10-15 seconds at least if not indefinitly. The water exiting the head was ~ 110 degrees. This was on the hose at about 500-600 rpm, in gear, in a bucket. The cooling water on the hose was @ 80 degrees. The other head was lukewarm and cooling water likewise. I'm not sure why one's hotter than the other but its not overheating.

Something else that I didn't think could affect heat this much...but the 'hot' side has one new piston and new rings on both pistons. The other side has the original rings. I honed each cylinder just enough to get the cross hatch back. I added some extra oil for the rings to break it it's about 40:1 right now. Could the extra friction be bringing up the cylinder temps?