[Y-Blockhead]

Originally Posted by dbaldwi3

Also as a side note the previous owner used a bolt with a lock nut to hold oil pump in place as far as I can tell the damage was limited to damaging the threads on the bolt, no cracks in block thankfully. I will replace it with the correct pipe thread plug.

I find it amazing how many people put a bolt in that plug hole to "hold the oil pump". A local 'machinist' did that to my block (among other things I wasn't thrilled about) that I had main bearings installed in . No doubt I won't be using them again.