So if I plugged the block and the head to prevent water loss it wouldn't hurt it?!?!? I'm just asking because this is the only thing keeping me from starting this engine since I had my little fiasco a couple of weeks ago and I am waiting to see if I can acquire a new bolt to replace the one that I heavy handed and twisted off. I would of course only want to run the engine to check it out and until I could get the new bolt.

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1981 300SD