lke2drvgsr

Just installed a brand new short block and swapped over my old oil pressure switch from my old block. I've tested the switch and it works (i.e. there's continuity with the engine off, and no continuity with the engine running). Oil is literally pouring out the side of it (i.e. between the threads) at a rate of ~1 qt/minute, even with lots of Teflon tape. Any idea?

Billman250

Sounds like the threads are split open from overtightening. The threads are tapered and overtightening can easily crack the head.

Clean it off with brake cleaner.

Watch it with a light while someone else starts the car. you may find the source is coming from a crack.

lke2drvgsr

If the threads are split or there is a crack, what kind of remedies are there? Would a thread insert/tap work?

Billman250

If its cracked, you need a really good welder to fix it.

or JB weld....even that will require some trained prep work.