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Ok, well my morning hasn't started off good, first I got in the vette this morning to go to church, well... Turned the key and a couple of cranks and then a loud snap, then the starter was free spinning. Well a couple hours later after church and letting the good lord calm me down. I pulled the starter out and the housing that sets into the the bellhousing had busted. Ok, well as I'm taking it out I looked up at the exhaust manifold where the pipe bolts up, I have a antifreeze drip there, now what is causing this? I just put a new/used 454 in the car 3 weeks ago it had 40k miles on it.
Worst case? Cylinder is full of antifreeze and when you tried to start it, the antifreeze won't compress so the starter nose breaks, can't take the torque.
Try turning the engine by hand to make sure, it can bend connecting rods if you force it with liquid on top of a piston. May have to pull spark plugs to see which cylinder.
On the other hand it may just be a coincidence that the starter broke and you have a coolant leak!