 Oil Pressure Switch question, Washer? |
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| 74ravenna |
 Mar 24 2022, 07:29 AM
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#1
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Member  Group: Members Posts: 471 Joined: 19-October 14 From: nh Member No.: 18,032 Region Association: North East States 
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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. |
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| falcor75 |
Mar 24 2022, 07:36 AM
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#2
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia
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I only use a copper washer. No sealant.
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| GregAmy |
Mar 24 2022, 08:11 AM
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#3
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Advanced Member Group: Members Posts: 2,302 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States
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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. |
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| 74ravenna |
Mar 24 2022, 08:58 AM
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#4
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Member Group: Members Posts: 471 Joined: 19-October 14 From: nh Member No.: 18,032 Region Association: North East States
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From Sweden to Ct.! Gotta love it.
Thanks Guys. |
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| 914Mels |
Mar 24 2022, 10:53 AM
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#5
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Member Group: Members Posts: 357 Joined: 20-June 11 From: Santee Member No.: 13,221 Region Association: Southern California |
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.
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