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914World.com _ 914World Garage _ Oil Pressure Switch question

Posted by: 74ravenna Mar 24 2022, 07:29 AM

Hi All.

I'm reinstalling the Oil Pressure Switch that is located on top of the engine next to Cylinder #4.

Does it require a washer?
Any specific torque setting?
Any sealant?

It's been a couple years since I've been able to do any serious work on the reassembly of my motor and I've forgotten a lot.
Plus, the research I've done doesn't clear up the mystery for me.

Thanks.

Posted by: falcor75 Mar 24 2022, 07:36 AM

I only use a copper washer. No sealant.

Posted by: GregAmy Mar 24 2022, 08:11 AM

It's a tapered pipe thread; the tapered threads seal it. No washer, as that is not a sealing surface.

Some use Teflon tape to help seal the threads (shouldn't be needed) but check the electrical grounding (shouldn't be a problem).

If you can screw the switch fully down to the case and it still doesn't seal, you have a different problem, maybe buggered threads in the case or switch.

Posted by: 74ravenna Mar 24 2022, 08:58 AM

From Sweden to Ct.! Gotta love it.

Thanks Guys.

Posted by: 914Mels Mar 24 2022, 10:53 AM

Check your switch. If it doesn't have tapered threads you were sold the wrong switch. The water cooled engines us a switch with a copper gasket. The threads are longer too.