I'm going to fit a (used) oil pressure gauge to my Spitfire. I have all the necessary fittings, but I've read that PTFE tape is advisable on the threads.
I have some tape, but I have no real idea what I'm supposed to do with it. I obviously wrap it round the thread, but how much, and in what direction?
If this used gauge doesn't work and needs to be removed, is there any danger of the tape falling into the sump/blocking the oilways etc?
Many thanks,
David