Water temp sensor in block (1 Viewer)

[StinkyPig]

As far as the head port goes, you need to run an adapter, which pushes the thermocouple up a bit. That makes more room for fluid to flow around it despite the shallow port... similar to the OEM sensor had.

Correct. In case anyone is looking for this info, it took me a while to find it. The adapter is available at McMaster Carr PN: 1786N258

Medium-Pressure Brass Threaded Pipe Fitting Reducing Adapter
3/8 NPT Female x 1/2 BSPT Male
Pipe threads on FJ40's are British Standard Pipe Thread-BSPT

 

[ukboneman]

Why not use the existing temp sensor for the sniper and whatever else you want for the cluster. The digital readout on the sniper will give you an accurate temperature if you are concerned that you are overheating.

 

[knuckle47]

so in order to minimize my work and/or mistakes, here are two photos of my May 1975 2F. The bolt circled in red has Teflon on it and I will assume this is the extra port plug we are talking about for the Sniper coolant sensor? It is about 6” forward of the existing temperature sender port. Unfortunately the current Weber carb is in the way of a clear direct photo.

Is this the correct location for the temperature sender coolant union?

 

[StinkyPig]

It will work. That is where mine are.

 

[knuckle47]

It will work. That is where mine are.

Thanks for the confirmation..l

 

[Half Wacked aka Split Pea]

What about this? 78 2F

 

[StinkyPig]

That will also work. Might not see the temperature as quickly as if it were in the head but it will work.

 

[Norseman66]

I have a '78 and just replaced with a rebuilt '84 and have found a few differences , My old thermostat housing has 2 "sensors" part of emission system that was removed by prior owner. That might be a place to place another temp sensor.

 

[ToyotaMatt]

I have a '78 and just replaced with a rebuilt '84 and have found a few differences , My old thermostat housing has 2 "sensors" part of emission system that was removed by prior owner. That might be a place to place another temp sensor.

these are available ........

OEM TOYOTA Cylinder Head Coolant Temperature Sensor UNION Nut 90404 Fits ALL F & 2F Engines 1/75 -1987 FJ40, FJ55, FJ60 - VintageTEqParts.com

OEM TOYOTA Cylinder Head Coolant Temperature Sensor UNION Nut - 90404 - Factory Pre-Lubed w/ Lochtite Type Green sealer - ...

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SOLID BRASS TOYOTA Cylinder Head Coolant Temperature Sensor UNION Nut 90404-16127 , Fits 1956-12/74 F Engines FJ40 , FJ55 , FJ45, - VintageTEqParts.com

SOLID Brass Alloy TOYOTA F Engine Cylinder Head Coolant Temperature Sender UNION - 90404-16127 - Fits ALL F Engines ...

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( THE ULTIMATE UNION HOSE BIB CAT'S MEOW ) Cylinder Head & Early Threaded Water Pump Outlet Heater Shut Off Valve / Hose Bib / Fitting Assy. Pet Cock 100% Made in JAPAN Chrome Plated Main body ALL BRASS Internals and Moving Parts Part # 87240-1001

( THE ULTIMATE CAT'S MEOW ) - Cylinder Head & Early Threaded Water Pump Outlet - Hose BIB OEM...

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NOS NON-USA OEM TOYOTA Cylinder Head Heater Threaded Union HOSE BIB DELETE Service / Plug F , F1.5 / 2F / 3F / 3FE / 3F CARB. / 2H , 1HD , 1HDT , 1HZ , 3B , 13BT 1962- LATER FJ40 FJ55 FJ60 FJ62 BJ60 BJ40 BJ42 HJ601 HJ61 - VintageTEqParts.com

NOS OEM Cylinder Head Heater Threaded Union HOSE BIB DELETE Service / Plug F , F1.5 / 2F / 3F...

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