Hi Scotty, love your videos. I need your advise…
I have a racing boat with an engine that will not turn. I can’t turn the crank by hand.
Here is some info on the motor. It is very rare .
It is a 167 Corvette Rat motor. BB 3904351 427 4 bo0lt. I was told it is bored out 120 over. Approx 750 HP.
Last summer I blew a freeze plug on the passenger side, the second freeze plug starting in the back going to the front of the motor. I found out that the freeze plug was a cheep and not the right one as far as the height if it. (the “walls” of the bowl, if you will, where not tall enough. Made in Japan, I think. Replaced it and tried to start it. Something is “locked up”.
I started to pull the plugs and they were difficult to loosen up. They were rusty and crusted with crap. I don’t know if was melted metal or piston material or ? So I squirted a few pumps of oil in each of the spark plug holes. ( on the passenger side).
I pulled the valve cover, looks ok.
Need advise. Thank you. Ralph in San Diego, CA