Paul has commented on this blog site - he must have found it on his own. We had been waiting to write to his website after everything was finished on Miss P.
He has beat us to it, and comments on our engine problems. He is THE MAN - when it comes to Chris Craft Commanders, he is the founder of the CCC Forum, an architect by trade, a Chris fanatic by admission. We are grateful for his website and value his comments on our situation immensely. This is what he has written:
"Man I am soooo sad to hear news like this, especially after you have put your heart and soul into the restoration. I note the use of Keith Black pistons, many people have used these as a basis for custom 427 pistons with good results.
The only things I can imagine that would cause the motor to heat up like that would be poor ignition/fuel mix, a very poor automotive timing setting (and not following the dimple on the flywheel at 500-RPM while in gear for the marine Chris Craft setting), or a leaned out fuel mix (or both simultaneously), or perhaps an impeller that went out causing a catastrophic over-heating of the motor while running at speed.
Forensic review of the impeller and strainer, and coolant would give an indication of their integrity.
This could have been caused by advanced ignition timing, wrong plugs, lean fuel, intake manifold vacuum leak, sticking valves (perhaps incorrectly set for a solid lifter motor), insufficient cooling, poor lubrication.
I have considerable resources I can share with you if you need them on the 427 marine motor. Drop me a line at ChrisCraftCommander@hotmail.com
and I'll do whatever I can to assist.
Sincerely,
Paul
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