Oil pressure switch question

[Finto_GX]

Hi ,
So my freshly rebuilt engine has an oil leak out the oil pressure switch. Ordered a new one and put a good bit of durka sealant on threads going in. Let it dry for 24 hrs, started it up and an even bigger leak from sensor.

My questions are:
-Could oil level be too high?
-Do I need a copper ring or o ring between sensor and block?
-should I use plumber tape on threads

Any suggestions be great thanks

 

[Finto_GX]

I also have an oil cooler with d1 sandwich plate if that makes a difference, ran it without sandwich plate and still leaks...

 

[eiregti]

Shouldn't need an sealant as far as i know as they're taper thread so sealant or pipe tape can actually form a bad seal

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[eiregti]

Bit of searching on google, the sandwich plate is 1/8npt thread and the oil pressure switch is 1/8bspt.. Close but two different threads so you probably wrecked the threads on the switch that's why it's not sealing for you

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[Finto_GX]

The sandwich is on oil filter housing. I didnt get a nip on sensor as i was afraid of pulling threads, old sensor threads where perfect. Ill give it a go it no sealant and tighten it till i get a nip

 

[eiregti]

I know what sort of sandwich plate ya have. I wouldn't force it, like i said, it could the wrong thread and that's why it won't seal and forcing it will likely wreck either the sensors thread or sandwich plate thread or both. Try find an adapter

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[Finto_GX]

Might try old sensor and go tighter