Had a hard time time getting it started the other morning (aound 28* F outside), so I decided to check out the block heater. Looks like it had never been used, but the wiring and 110 plug were shot. I rewired the whole thing, put it on a timer to run from 3 am to 5am. she started right up, very cool. My question... Since the block heater looks like it's never been used before, Is there anything I should be looking for? The seal at the freeze plug hole looks good, no problems. But I'm getting ready to tow with it, Just don't want any suprises.