Stop in for a cup of coffee

I try to use the copper ones if I can, they seem to seat better and wont corrode. Seriously blow out the water jackets tons of crap in there. Pull the pipe plugs before you do it. Usually a inch of crap in there even after boiled out.
yup, already planning to blow out the water jackets, i have 2 freeze plugs out and almost nothing in the jackets so far.. pretty happy with that