Temperature Sensors - Tell Me Experts

Paylrider · Post by **Paylrider** » July 25th, 2005, 7:45 pm

I switched a 92 K-8 for a 95 K8 this weekend, when I was hooking all the sensors back up, there was one missing, on the 95 K-8 there was only one probe in the top of the engine, while the 92 had 2. The wires are the same colour for both on the 92, however the plugs are not interchangeable, now my temperature guage does not work. I am thinking that by 95 they realised that two probes 2 inches apart was overkill and just went with one. I am also thinking that if I splice my temperature sensor wires into the identical probe both will work. any comments suggestions?

babyblueMX3 · Post by **babyblueMX3** » July 25th, 2005, 8:01 pm

normally one clt sensor is to trigger the fan.. May people have the same problem with their ze where there is only one clt sensor. Normally what people do is they tap the other sensor in the neck where there used to have it

Paylrider · Post by **Paylrider** » July 25th, 2005, 8:03 pm

Is that not a bit risky? how difficult would that be if a machine shop did it, also would splicing work??

Grants · Post by **Grants** » July 25th, 2005, 8:27 pm

also would splicing work??

No

Paylrider · Post by **Paylrider** » July 25th, 2005, 8:41 pm

Is it not risky or does splicing not work? why does the 95 engine have only one.

jschrauwen · Post by **jschrauwen** » July 25th, 2005, 9:05 pm

Fred, tried calling your number - no answer. Since you have both engines and the wiring take the coolant filler neck with the 2 thermosensors off the old engine and plant it on the new. No tapping required. ECU, temp guage and fan will never know the difference. I'm assuming your talking about the green and black thermosensors that are almost beside each other on the cast filler neck.

babyblueMX3 · Post by **babyblueMX3** » July 25th, 2005, 9:17 pm

jschrauwen wrote:take the coolant filler neck with the 2 thermosensors off the old engine and plant it on the new. No tapping required.

John, his new engine doesn't have the hole for the second sensor. Therefore, he has to tap the hole in the filler neck for the second sensor like people do on their ze's. Maybe I didn't read right.

Paylrider · Post by **Paylrider** » July 25th, 2005, 9:26 pm

Thanks for the input, I think ripping the entire engine apart again just for the pre-drilled hole is to much work, I was thinking I would go to the engine re-builders in Trenton and get them to tap a new hole, they do it all the time, so it should not be a problem. If they screw it up, then the big job

Rick Johnson · Post by **Rick Johnson** » July 26th, 2005, 12:12 am

1 - 13/32's drill bit $4
1 - m12X1.5 tap $7

Your problem solved = priceless

You don't even need to drain your coolant to do this, just pull the hose and stick a vacuum in there while drilling to suck out all the filings.

There should be a good meaty spot to drill thru.... make sure step up the bits using a couple smaller ones before the big one.

And when you tap it make sure the tap is STRAIGHT or you will be in a world of hurt.

PATDIESEL · Post by **PATDIESEL** » July 26th, 2005, 1:10 am

do not tap it with the neck on the car, you are destined to leave some metal in the filler neck which will clog coolant passages and then the motor will overheat and you won't be able to unclog it. Answer then is to buy an new motor. So do the right thing and just swap the filler necks. It is the easiest and best way...period, no short cut answer here.