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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

22re temperature sender thread size

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Old Jan 19, 2019 | 04:07 PM
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elijah.bunten's Avatar
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22re temperature sender thread size

I’ve been thinking of installing a after market water temp gauge (stock sr5 dash one doesn’t work) so I would like to have the probe for the gauge take the place of the factory temp sender on the thermostat housing but can’t seem to find out what thread size the factory one is, If anyone has any idea I would be stoked to hear it
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Old Jan 19, 2019 | 04:49 PM
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I can't tell you the SIZE, but I'm 99% the thread form is a British Standard Pipe Thread (Tapered) BSPT. https://www.ralstoninst.com/news/sto...and-bspt-seals
It's probably 1/8-28. (1/8 INCH? British? On a Japanese Truck? Go figure.)

Note that an NPT fitting is likely to be 1/8-27. Not only does it have a different thread form (60° rather than 55°), but a different pitch. Close, but no cigar. You could probably screw an NPT fitting into the hole, but it would probably leak, and it would probably damage the casting into which you're trying to screw it.
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Old Jan 19, 2019 | 05:27 PM
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Right on, I ordered a 1/8 npt to 1/8 bspt fitting so hopefully that will work, thanks for the advice!
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Old Jan 19, 2019 | 06:55 PM
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Curious; I looked up on Rockauto for an '89 pickup 22RE temp sender, and looks like straight threads with an "O" ring?

I'd just pop it out of the engine and have a closer look.

https://www.rockauto.com/en/moreinfo.php?pk=930296&cc=1388875&jsn=376

Last edited by JJ'89; Jan 19, 2019 at 07:01 PM.
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Old Jan 19, 2019 | 07:58 PM
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Hmmm. The o-ring certainly is an indication of a straight thread.

Then, is it NPS or BSPS? I certainly don't know.
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Old Jan 20, 2019 | 05:41 AM
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From: nh
Originally Posted by elijah.bunten
I’ve been thinking of installing a after market water temp gauge (stock sr5 dash one doesn’t work) so I would like to have the probe for the gauge take the place of the factory temp sender on the thermostat housing but can’t seem to find out what thread size the factory one is, If anyone has any idea I would be stoked to hear it
that fitting is not the gauge sender. the gauge sender is mounted lower, about halfway on the block, sort of under the upper plenum and between the lower intake runners. the sender near the t-stat is for the ecu.
i




Last edited by wallytoo; Jan 20, 2019 at 05:53 AM.
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