Koso slim water temp gauge install (2 Viewers)

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Long term thoughts on this Koso? Going to install one of these with this 80 series 1FZ Upper Coolant Outlet- Modified from Joey at some point.
Even though I sold my 80, it was to a co-worker. Still running great. I like Joey's approach better as my cuts weren't great and had small leak from where I cut the tube and put the adapter doohickey in.
 
Even though I sold my 80, it was to a co-worker. Still running great. I like Joey's approach better as my cuts weren't great and had small leak from where I cut the tube and put the adapter doohickey in.
Side note I think mentioned in this thread, the display is bright! If you don't like that much light from a display driving at night, I would have probably put a flim tint strip over it or maybe spray tint as the one I have isnt dimmable (to my knowldege). I had originally tried tieing in to the dimmer dial, that didnt work. (Im probably just a maroon though)
 
Side note I think mentioned in this thread, the display is bright! If you don't like that much light from a display driving at night, I would have probably put a flim tint strip over it or maybe spray tint as the one I have isnt dimmable (to my knowldege). I had originally tried tieing in to the dimmer dial, that didnt work. (Im probably just a maroon though)
Good to know, I am also a large maroon. The tint film tape sounds much more my speed
 
Three years in, my Koso is working great. Tint in place, too. The only issue I had was the display flashing (indicating over-temp condition). Turns out it was a pinched wire grounding out the gauge.
 
3 yrs in with zero problem..
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Roughly two years of use on mine installed in the same location, I do find it reads lower there than the OEM sensor (Roughly 10-12F cooler)
 
Roughly two years of use on mine installed in the same location, I do find it reads lower there than the OEM sensor (Roughly 10-12F cooler)
OEM sensor?
 
OEM sensor?

Yes the one that the ECU is seeing, I monitor the factory sensor with OBD1 dongle and App and have the Koso gauge as well.
 
Love mine. I opted for red because I had lasik 13 years ago and blue lights at night are just a big blue blur now. The red isn't too bright either.
 
Installed mine onto the big hose about four years ago, no leaks and still going. I assume that the reading is accurate but don't know for certain.
 
I just wanted to update this thread with some new information i found. I just bought this kit to install on my truck and it seems that a change to the temp sensor has been made.

The temp sensor in this kit now uses a different thread pitch from what was listed by the OP in post #8.

The threads on this sensor are now 1/8 inch, by 28 threads per inch Whitworth BSPT, not, i repeat not, SAE 1/8 inch by 27 threads per inch NPT pipe threads.


Now for a word of warning, this new Whitworth threaded sensor will screw into a hole threaded with a 1/8X27 NPT tap. But since the thread pitch is off by 1 thread per inch, and this sensor uses a different thread angle (55 Degree versus 60 degree for NPT) i wouldn't recommend it.

Below is a link to where you can buy the correct BSPT tap.

 
I thought about using the Koso but went with a setup that fits in the switch blank instead. Although with this route it's a bit off to the side. Not near the gauges is a negative.
View attachment 2312775
definitely a negative IMO. put the gauge closer to the cluster so i can see it without having to look for it. The lower factory switch location i am using for other accessories.
 
definitely a negative IMO. put the gauge closer to the cluster so i can see it without having to look for it. The lower factory switch location i am using for other accessories.
I use it for a transmission temp sensor. So I only really look at it when im pulling steep grades with a trailer.
 
I just wanted to update this thread with some new information i found. I just bought this kit to install on my truck and it seems that a change to the temp sensor has been made.

The temp sensor in this kit now uses a different thread pitch from what was listed by the OP in post #8.

The threads on this sensor are now 1/8 inch, by 28 threads per inch Whitworth BSPT, not, i repeat not, SAE 1/8 inch by 27 threads per inch NPT pipe threads.


Now for a word of warning, this new Whitworth threaded sensor will screw into a hole threaded with a 1/8X27 NPT tap. But since the thread pitch is off by 1 thread per inch, and this sensor uses a different thread angle (55 Degree versus 60 degree for NPT) i wouldn't recommend it.

Below is a link to where you can buy the correct BSPT tap.

Where did you order the gauge and sensor from? When I ordered one a few years ago they offered multiple sensors with different threads.

Edit: it looks like they still sell the sensor with a variety of thread options.
https://kosonorthamerica.com/product/temperature-sensor-black-connector/
 
Where did you order the gauge and sensor from? When I ordered one a few years ago they offered multiple sensors with different threads.

Edit: it looks like they still sell the sensor with a variety of thread options.
Temperature Sensor (0-150°C - 32-248°F) - with Black Connector - https://kosonorthamerica.com/product/temperature-sensor-black-connector/
I ordered my gauge kit from Dennis Kirk Koso North America, my sensor came as part of a complete kit for $44.95.

That list of sensors you linked to are replacement sensors at a cost of $12.95 each that's over and above the $49.95 cost for the complete gauge and sensor kit from Koso North America.com.

One other thing i noticed about that list of sensors that you linked to, even on that list they don't offer a 1/8X27 NPT pipe thread sensor.
 

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