RTV900 Oil Temp Sensor

[bill51]

sounds like your thermostat is stuck open. dealer should be able to fix it very easily. It will not cause ant damage as is.

 

[chilibit]

bill51,

Hmm, had not considered that.

There are actually two sensors on the 900 that look at the water temp. One sends data to the gauge. The other triggers a relay and starts the fan. The fan starts. I am guessing that this means that temperature is going up to some point. Otherwise why bother with a fan sensor at all. The fan sensor is likely to be binary (on or off) while the temp gauge sensor must have a variable output. I think I will jumper the output of the fan sensor to the harness for the gauge and see what happens. Dead cold and then after it triggers the fan. My guess is that it will peg the gauge just like the full tank of diesel pegged the gauge when we swapped the plugs. And if it does, then maybe we know that the gauge wiring harness is working.

The block gets warm enough that you don't want to put your hand on it. So even if the thermostat is stuck open, it is still getting pretty warm. But I don't have a probe to determine just how hot. Pulling the gauge sensor out of the block and "Bic-ing" it with a lighter only covered it with soot. No response from the gauge.

The dealer's advice to rap the gauge a few times with a screwdriver handle achieved nothing.

Vince

 

[Tact]

My temp gauge almost never moves. The only time it moved is in the summer time and I was pulling a loaded trailer. It then moved to about 1/4 on gauge. Then at idle it came back all the way down and pegged. I too took mine to the dealer, changed gauges several times, but still fogs, switched the sending sensor, and it still performed as it does now. I think it's just it's nature but I wished it would register something. /forums/images/graemlins/grin.gif

 

[whoodle]

My guage seems to do about the same. Driving moderately fast does not seem to register, but slow on steep hills in low will give me about 1/4 then drop fast at idle. Usually when I am really loaded, I don't go far so no movement.

 

[chilibit]

This morning we got in a replacement gauge. Fired it up and within a few minutes the needle was obviously registering. The dealer says he looked at an RTV that had just come in for a 100 service and it was not registering either. The owner says it never has registered and bragged on the cooling system.

I think the gauges are bad. This one works. And it behaves like you would expect it to. I wrote him a check for the RTV and he left the farm.

Thanks for all the thoughts and suggestions.

Vince