Installed new Oil Pressure Switch (2000 ZX3) still leaking oil ...
I just bought a new oil pressure switch for my ZX3's Zetec engine because the old one was leaking oil. Brother installed it and he said that it's still leaking a little bit. Why would the new one leak oil still? He didn't put anything on the thread of the oil pressure switch, he just installed it as is. Is there some kind of sealant that should be put there to prevent the oil from oozing out. Seems like no matter how tight the oil pressure switch is screwed on, the oil still manages to leak out. Any suggestion would help.
We are sure that this is the source of the leak because we saw the oil come out of this part, so it's just a matter of how to seal that screw properly. Thanks!