Installing oil temp and Pressure gauges???

[iceminion]

DSM's use BSPT (British Standard Pipe Thread) for the oil sending unit
Aftermarket ones are NPT (National Pipe Thread)

The difference is one thread per inch (or something)

Long story short, i cracked my oil filter housing because of the thread mismatch. I had to get it welded.

Granted I was installing it in the winter, so the aluminum housing was easily cracked.

And if I just used more teflon tape, and didnt screw it in very far it probably wouldnt have cracked.