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Gasket for Oil Pressure Sending Unit?
Posted: Fri Jan 20, 2012 11:33 am
by misszora
Howdy,
Is there a gasket that goes between the oil pressure sending unit and the case? I've got so many pretty, new gaskets in my kit and didn't see a mention of one for this application but wanted to double check.
thanks!
Re: Gasket for Oil Pressure Sending Unit?
Posted: Fri Jan 20, 2012 12:50 pm
by dtrumbo
No gasket. I very sparingly applied Permatex to the threads of the sender before screwing it in. Too much could potentially clog the hole in the bottom and get into your oiling system. Not good.
Re: Gasket for Oil Pressure Sending Unit?
Posted: Fri Jan 20, 2012 1:40 pm
by Gypsie
That thread is tapered so don't go gettin' all crazy with the tightening....
It also helps to assure a good seal.
Re: Gasket for Oil Pressure Sending Unit?
Posted: Fri Jan 20, 2012 6:46 pm
by Amskeptic
misszora wrote:Howdy,
Is there a gasket that goes between the oil pressure sending unit and the case? I've got so many pretty, new gaskets in my kit and didn't see a mention of one for this application but wanted to double check.
thanks!
Sorry I had to trim the thread to keep it useable for the readership.
There are two different types of threads found on oil pressure senders, tapered and straight.
The tapered threads are found primarily on Type 1 engines and do not need a washer. The Type 4 engines commonly have straight threads that do use a copper washer.
If you have a steady low torque that ends abruptly as you tighten it down by hand, it is a straight thread.
Never use teflon tape on either style, but Permatex Aviation or Curil is OK, as long as you do not over-tighten the tapered thread sender. Type 1 engines have been known to crack their gallery when tapered thread sender wedges the hole apart like a log splitter.
Colin