Oil Pressure Sender Extension Anybody Know...

What happens when you use nothing? The other choice is to get a 3/8 NPT die, screw the sender into it and see if you can cut another half turn on the threads. Tryiing to run the fitting loose will result in an oil leak. The only other thing to use beside teflon tape would be teflon pipe dope.

 

If you can't tighten the extension so that the sender is at he correct angle described in the engineering assembly manuals (shame on you if you don't have them) then try another fitting. They are as close as a 1 800 number. Cutting more threads could possibly solve your problem but leaving it un tight for the sack of positioning will certainly allow it to leak. The Teflon tape or sealer only helps for a minor fitment issues not a half a turn. Bob

 

using some teflon tape or teflon pipe dope is going to let you turn it more, not less, before binding occurs.

Z.

 

The fact that the threads on the fitting are taper cut means it is an interference fit, the threads bring pressed together by the taper action actually do the sealing. Using Teflon in the form of tape or liquid helps this seal but also prevents the threads from galling, making it impossible to remove the fitting without damaging both pieces. (Very important when working with aluminum fittings).

Running it loose will cause vibration to destroy the seal and cause 2 buko leak. I have seen very few steel fittings screwed into cast iron that wouldn't go another half turn when tight. Careful there, though as that fitting is located in a part of the block that would be very difficult if not impossible to get an easy-out in should you brake it.

Just try another *$*() fitting

 

that's been my experience as well. I hate to advise anyone to follow my lead as I don't want you to track me down if the extension breaks off in the block.

Z.