In the picture below, I'm leaking around the oil pressure sending switch (34-092) and about to order a new one. I havent taken the old one out yet to look at it. Is there a gasket that will come with the new component or do I need to add something to it to form a seal.

Thanks
dean

 

The sender is pipe thread. Use dope on the threads. Teflon tape may insulate the ground path for the sender.

 

NPT=national pipe thread. It is tapered and self sealing, you can use a small amount of thread sealer if you want to. Do not use Teflon tape as they may interfere with the connection and cause erratic readings.