M936 Overheating

[SLOrazorsedge]

Take a infrared heat gun with you to shoot accurate temps. I always have one in my trucks to check heat status on the engine and various running gear, hubs, tires, etc.

 

[silverstate55]

Remove the line going from the shutterstat to the fan, Get the engine up to 210 or so on the gauge, use an air compressor and air blower attachment put to the line, if the fan runs, it's either the shutterstat or one of the elbows is clogged up..Or as Suprman said hook both airlines together to rule out fanclutch ect... An elbow with 1/4" flares or 1/4 inch t with cap http://www.steelsoldiers.com/showth...e-shutterstat-fails-cheap-fix-for-emergencies .... I went and bought a shutterstat because my fan on my 923A2 stopped working. Was about to start swapping them out, pulled the elbows off the old shutterstat and noticed one of the elbows appears to have a filter in it, looked completely clogged up. Bought an elbow, tada..... Not the shutterstat.

Thanks 1 Patriot-of-many! I was just going to post that....this same problem happened with my truck, with same results you just posted.

As just pointed out, try replacing or bypassing this 1/4" flared elbow to see if air pressure will lock up fan clutch, and use rest of great advice others posted. You should easily be able to drive it back home.

 

[1 Patriot-of-many]

Thanks 1 Patriot-of-many! I was just going to post that....this same problem happened with my truck, with same results you just posted.

As just pointed out, try replacing or bypassing this 1/4" flared elbow to see if air pressure will lock up fan clutch, and use rest of great advice others posted. You should easily be able to drive it back home.

I'm wondering how many people replaced shutterstat when it was an elbow clogged up!

 

[silverstate55]

I'm wondering how many people replaced shutterstat when it was an elbow clogged up!

I can nither confirm nor deny....

 

[1 Patriot-of-many]

I can nither confirm nor deny....

Lol.....

 

[ccbamatx]

Remove the line going from the shutterstat to the fan, Get the engine up to 210 or so on the gauge, use an air compressor and air blower attachment put to the line, if the fan runs, it's either the shutterstat or one of the elbows is clogged up..Or as Suprman said hook both airlines together to rule out fanclutch ect... An elbow with 1/4" flares or 1/4 inch t with cap http://www.steelsoldiers.com/showth...e-shutterstat-fails-cheap-fix-for-emergencies .... I went and bought a shutterstat because my fan on my 923A2 stopped working. Was about to start swapping them out, pulled the elbows off the old shutterstat and noticed one of the elbows appears to have a filter in it, looked completely clogged up. Bought an elbow, tada..... Not the shutterstat.

Patriot-of-many gets the prize!!!!

It was the elbow. So... I go down to NAPA and they have an elbow, but not one with screens. I got that one... what is up with the screens and any idea on where I get one?

Oh... two more shout-outs to Suprman for suggesting to troubleshoot by bypassing the Shutterstat and 74M35A2 for suggesting that I just get on the road and drive.

Once I got on the road, the temp stayed at 180.... When I pulled over to wait for my 12 yr old daughter to catch up (she gave the the 1st leg ride)... the temp increased to 200 and a little over.... 12 yr old was on private dirt roads... of course