How/where to a install 2nd electrical water temp sending unit fj60 (1 Viewer)

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Good info - do you recall which VDO model you used?
Sorry, I do not. I just went and looked & there is nothing that would ID it. It was brand new in a box...but I bought it at a garage sale. No telling how old it was. Here is a picture of mine if it helps.
image.jpeg
 
@John McVicker
Is that VDO gauge calibrated (close enough) to the Toyota sender?
With a 190° thermostat, the temperature of the Toyota sender should be showing near 210° at normal operating temperature. The sender is considerably hotter at the back of the engine than the coolant flowing out past the thermostat in the front. It also isn't detecting just coolant temperature but cylinder head temps too.
 
It was when I installed it...and I think it still is.

Take a peek at post 21 of this thread. I remember you mentioning something about that back when I did the VDO install. So at that time I warmed up the engine, the VDO was steady @ about 198* and that's also what my IR gun showed at the bottom of the threads of the sending unit.

It's been pretty rock steady since, but I haven't rechecked it with the IR gun.
 
Hey Guys!
I know this is an old thread but it seems to be the one that popped up the most any time I searched around regarding the FJ60 Water Temp Sensor, so I thought I'd share my secondary/backup Sender install.
I rebuilt my gauges but couldn't get them dialed perfectly. Either way, I planned on installing a secondary circuit just for "piece-of-mind". I used a Bosch gauge & sender. I was also hoping I could just use one of the supplied adapters to install it in the thermostat housing by replacing one of the old sensors used by the emissions circuit. Unfortunately, it's a completely different thread size, so I had to improvise.
I drained the coolant, pulled one of the old Aisan sensors, chopped her up, and drilled her out. I was then able to easily, (with very little drilling, just chamfering) tap the hole for the Bosch sender unit. It looks a bit funny with 2 "adapters", but it worked great. That and Im getting temp readings from the block and NOT a radiator line like I would have if I used one of those housing adapters that splice into one of the radiator lines. Pics below. Hopefully, this helps anyone in the future looking to do the same.
*** btw, this is my first post on here*** 💯🎉
IMG_8809.JPG

IMG_8884.JPG

IMG_8887.JPG

IMG_8889.JPG
IMG_8890.JPG

IMG_8891.JPG

IMG_8892.JPG

IMG_8894.JPG
IMG_8898.JPG
 
I also found those OEM little green bulb condoms on Amazon! So I put them on the Bosch gauge bulbs to match my instrument panel! Looks amazing!View attachment 2867384View attachment 2867385View attachment 2867386View attachment 2867387
Rad! I was installing my Holley sniper this summer and tried to use that same location for the temp sensor and the wiring loom was just long enough to fit, but it stretched the wire too taught. I ended up using the drain petcock on the lower block back by the firewall, but I really wanted to do it like you’ve done. Nice work! And welcome to the forum!
 
Rad! I was installing my Holley sniper this summer and tried to use that same location for the temp sensor and the wiring loom was just long enough to fit, but it stretched the wire too taught. I ended up using the drain petcock on the lower block back by the firewall, but I really wanted to do it like you’ve done. Nice work! And welcome to the forum!
I considered the block petcock as a location as well. Holley Sniper FTW, though! 🤙
 

Users who are viewing this thread

Back
Top Bottom