Oil pressure sender switch and coolant sender what type of thread sealant to use since your not supposed to use Teflon so it can ground correctly

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wildone454

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Oil pressure sender switch and coolant sender what type of thread sealant to use since your not supposed to use Teflon so it can ground correctly
 
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Ive always used Teflon paste and tape just don't use a bunch...make sure some of the brass is showing
 
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Technically you shouldn't need any thread sealer as the fittings flare out/taper out. So the tighter they get, the wider the threaded area is, and the tighter the fit in the hole.
 
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wildone454 said:
Oil pressure sender switch and coolant sender what type of thread sealant to use since your not supposed to use Teflon so it can ground correctly
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As @DoubleDingo already pointed out,they are NPT which means they taper and the more you tighten it,the more wedged it becomes. NPT does not have a specific torque,and you don't want to over tighten it,you can actually crack things. It's just snug,plus a little but more if it leaks give it just a little more.
 
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Gasoila is the red stuff that's usually used on fuel systems and often shows up on pipe threads on senders. However, it's not exactly in every store.

It's pretty common to use pipe joint compound that can be found in any home store.

Teflon tape is okay if not abused, as others have said. I would not put it together dry and expect the taper to seal it. Plumbers never do that, because tapered pipe thread is one of the $#itiest connections in the universe. It's the household equivalent of TTY fasteners. Getting them to seal involves TTD. Tightening To Destruction.
 
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I use a bit of PTFE paste but that is from decades of working with stainless steel. Use it sparingly and it will be ok.
 
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All you need to know,how it works,and how tight,kind of a long read,but good info to know.
www.industrialspec.com

Getting to Leakproof with NPT & NPTF Threads: What Matters

NPT & NPTF pipe threads are almost identical & make solid, tight connections. Find out how they differ, plus assembly tips & insights for leak-free unions.
www.industrialspec.com www.industrialspec.com
 
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Liquid teflon never hurts if used in the correct places and not over applied. One thing to point out, in an ideal world those fittings may be fine without additional sealers. Problem is we are dealing with mostly used parts and not clean threads.

I have been burned too many times not to add a little insurance.
 
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