Originally Posted by CC2MC
Man, after reading this thread, I am a little nervous of my LT-1 block, which I drained. Just worried about potential pockets now, as I have not run antifreeze through.
Same here. Have dry blocked my LT-1 and now MCX since 2003 without issue.
I agree about not trusting the petcocks on the block drains though. They get plugged pretty easily. Better to unscrew them completely from the block.
To the OP, just drain the water for the short time in the winter where there's a chance of freezing. Safe and relatively easy. Even easier if it's a DD boat.