I also recently put Marty's oil pressure sender into my car. I used teflon tape. Although it might seem like you are insulating the unit from ground in the process of tightening up the threads it will make contact unless you wrapped it way too thick. Be sure not to cover the end with the tape or it will plug up the hole in the end and if you remove it get all of the shards of tape out of the threads. This is the biggest reason not to use the tape, if you take things apart the pieces of tape can get caught in the system. On hydralic systems I use a special dope that is an anaerobic sealer. BTW the sender unit is great, the gauge actually reads as you idle and increases as the rpm's increase. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxx, "Scot Stern" <SGSKBM@xxxx> wrote: > This one is probably too simple for all concerned. Should the > threads of the oil sending unit be wrapped with tefleon tape? If so, > how does the unit get its ground? If not, does it leak? > > I recently replaced my original with a Mid-States upgraded one > designed for the oil pressure gauge and I have been wondering about > the correct procedure. > > Thank you, > > Scot 6452