Update,,,and my latest screw ups <img src="/forums/images/graemlins/scared.gif" alt="" />
.
Thanks for that excellent explaintion on those rings, haztoys. I'm just hoping all the idling time I ended up having before hard underload drive didn't negate proper ring breakin.
.
Ok, Started engine and drove around 2 miles under light load on pretty flat road.
Back in driveway I let idle and set timing ( it took me longer than it should, idled good 15 min.. Shroud isn't on.

Temp. gaugue slightly above normal op. temp. Turned off engine.
------Screwup------ <img src="/forums/images/graemlins/scared.gif" alt="" />
.
Noticed pin hole leaks in Radiator tank upper seam bubbling coolant,,so feeling axnious , I turned Rad cap to blow pressure into reservour.
I went Too Far with cap and went past notch #1 - to res.- and went to notch 2,,,and coolant blew out from under cap--big time- big mess. No rag , could not shut it off.
Let everything cool for 1/2 hour, then slowly added coolant.
Motor hold about 1 3/4 gallon (I think) and rad holds about a gallon.
I had to add 3/4 gallon to replace that which boiled out.
Bottom hose seemed all most empty before refill.
Hoping 1 3/4 gallon was still in engine , as coolant comes out of top of water pump, coolant hopefully was still in water pump, central pipe, heads and block. I know the was no coolant left in intake manifold with its' poorly located temp gauge sensor.
.
I then drove about 75 miles that night over and around the hills. Everything seems OK.
.
???????So how much damage do you think I did by releasing all that pressure and heat all at once <img src="/forums/images/graemlins/scared.gif" alt="" /> ?????????????