 Thread ID, oil pressure sending unit |
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| orangecrate |
 Mar 17 2019, 09:30 AM
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#1
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Member  Group: Members Posts: 152 Joined: 16-September 13 From: Apache Junction AZ Member No.: 16,394 Region Association: Southwest Region  |
I've done a search here but can't seem to come up with anything.. Can anyone tell me what the thread is on the oil pressure sending unit? As in 8x1.5 , 10x1 , whatever.. I'm looking to run the typical T with mechanical gauge and the idiot light. But I'm not gonna run paint ball hose or a grease gun hose. Probably copper tubing. It will handle vibration and heat. Or stainless if I can find some around here.
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| TheCabinetmaker |
Mar 17 2019, 10:50 AM
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#2
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Can't remember which. ⅛ or ¼" npt threads
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| BeatNavy |
Mar 17 2019, 10:55 AM
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#3
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region 
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1/8 npt
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| Mike Bellis |
Mar 17 2019, 11:18 AM
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#4
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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It's 10mm.
10mm and 1/8 NPT have almost the same thread pitch. The NPT is tapered, the 10mm is not. 1/8 NPT is used without trouble quite often. Just remember your pressure sending unit requires a ground, as you add T fittings and such. Braided grease gun hoses work great as an extension and are 1/9 NPT. |
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| Mark Henry |
Mar 18 2019, 04:10 AM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
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| Tbrown4x4 |
Mar 18 2019, 05:27 AM
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#6
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Senior Member Group: Members Posts: 703 Joined: 13-May 14 From: Port Orchard, WA Member No.: 17,338 Region Association: None
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Regular paintball hose is 1/8" pipe thread. Spyder hoses are metric and sealed with an o-ring. There is also a $5 adapter from metric to 1/8" NPT available.
The paintball hose can handle at least 850 PSI, but I don't know if hot oil would be OK. I can check the thread size in the morning and thread one into my case to see if the adapter works, at least. |
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| Tbrown4x4 |
Mar 18 2019, 10:54 AM
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#7
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Senior Member Group: Members Posts: 703 Joined: 13-May 14 From: Port Orchard, WA Member No.: 17,338 Region Association: None
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Why did I get involved in this? I'm usually not so easily baited into posting, but here we go. The Spyder threads are metric, but will not thread into my case. I have a Snap-On Metric tap and die set, and it includes a 1/8-28BSP tap, which threads easily into my case using only finger pressure without cutting threads. 1/8 NPT is 27 tpi, so it may be close enough to thread in and seal.
I have a ton of new 1/8 NPT fittings, and they do not easily thread into the case. I get maybe 2 full threads until it wants to bind. I don't have a sending unit to measure. |
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| BeatNavy |
Mar 18 2019, 11:18 AM
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#8
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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QUOTE(Tbrown4x4 @ Mar 18 2019, 12:54 PM)  Why did I get involved in this? I'm usually not so easily baited into posting, but here we go. (IMG:style_emoticons/default/smile.gif) I posted too early. I remember researching this a few months ago and studied that thread that Mark posted above. I was planning for the Oil Pressure sensor I'm installing as part of an engine rebuild. I've used the stainless steel paintgun hose before, and I wanted to do it again on this engine. Now I recall that threading the paintball hose (with the 1/8 NPT) directly into the case didn't feel 100% right at the time, and I was worried it was stripping a bit. For the engine rebuild I purchased a 10mm to 1/8 NPT adapter a few months ago. The 10mm threaded into the case perfectly. |
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| brant |
Mar 18 2019, 11:26 AM
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#9
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914 Wizard Group: Members Posts: 11,613 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains
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yes technically it is metric
I bought a conversion fitting to make it into a grease hose SAE you should not run rigid tubing it will eventually crack the leverage of standing up 5 inches, through the tin work, and then have a sender mounted on top... will cause vibration and eventually a crack but hey.. .its only your motor oil pressure why worry |
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