M925A2 overheating, I think

[gobsmacked]

I have a M925A2 with a cummins turbo, the temp gauge will go to 240 and hang there, the fan comes on at 200 runs for a bit than goes off, it seems to hang just under the 240 mark. has antifreeze, doesn't boil over, and doesn't smell or seem hot. where should I start, I am getting ready to take it to NC in a week or so, I welcome any ideals or help or directions

 

[Flea]

I'd start with getting it up to temp (240 on the gauge), then aim a digital temp gun at the thermostat housing.

 

[NDT]

Verify the part numbers on the sending unit, mismatched senders/gauges can read all wrong like you are seeing.

 

[sweetk30]

I'd start with getting it up to temp (240 on the gauge), then aim a digital temp gun at the thermostat housing.

ir temp gun at its best job .

x2 for this test . 1 of the best tools to buy ever .

 

[Swamp Donkey]

Bad grounds lead to high temp readings on gauges. The gauges ground to the panel through the mounting brackets, which is a known problem area.

Verify temp with IR gun. If actual temp checks good then check the gauge ground on panel.

 

[simp5782]

Swamp donkey just loves the ground mod

Sent from my SM-G935P using Tapatalk

 

[Swamp Donkey]

Yes he does...

 

[gobsmacked]

Flea, thank you for the help, was thermostat, 240 in housing and 140 in the hose

 

[Karl kostman]

gobsmacked it sounds like you got all the advice needed to fix your problem but I just wanted to suggest one small correction to your post, your truck has a CUMMINS engine in it, not a CUMMINGS!
KK