Operating Tempature

[flyerd124]

Hello all. Got a question about temperature. My deuce will run all day long at 140-145°. When I get out and drive for a little bit it will go up to 180-185°. Is this normal for that large of an increase? Please forgive me if this is a silly question but I am new to multi fuel.

Don (Tampa).

 

[Jeepsinker]

Sounds like your thermostat has either been removed and not replaced, or it may be stuck open.

 

[flyerd124]

So what should the normal temperature be? And it should not fluctuate very much?

 

[barefootin]

If you google it, you will find that it has been discussed before.... That being said, mine runs 160-165F... The highest I ever saw it was 185F and that was a 90F day and my third loaded hilly trip making it work, but as soon as I was back on the flats it would decrease again.

 

[flyerd124]

Thank you for the replys. I did Google it and found some discussion on it. I found the Napa part#s and think it will replace the thermostat this weekend and see if that does the trick.

 

[doghead]

Have you verified the temp on the gauge with an IR gun or by some other means?

Accuracy is not as important and monitoring it and knowing if it is overheating(over 200F).

Some trucks run cooler than others.

180 is just fine.

 

[flyerd124]

That's a good idea. I have an infrared gun. I will try that before pulling the thermostat. It just didn't seem right to run that cold and then go up that high even though 180 is not to high. I am just trying to pick some brains before any assumptions.

 

[Jeepsinker]

Check temp at the thermostat housing, top radiator tank, and intake manifold just aft of the thermostat housing.