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The 8,3 is a newer design motor made to meet smog regulations and there for shoud run hotter to brun cleaner. Cold motor burns more fuel and burns it bad. The only way you can verify the fan working is open the hood, pull out the throttle and wait. If you havev a laser temp monitor you can verfy...

One of the MV trucks I own a M923A2 was re painted at a private body shop contracter. The work was shameful at best. I contacted a logistics officer I know at a US base in Italy and he confirmed the US Army must use them for they have more work then they have men that can perform it.

Can you get some pics of the motor?

Can you take another photo more to the right of these gauges? Thats a super clean dash and looks like new guages. How many miles and hours?

Thanks for the Link and pics!

Have you verified the fan is not running by opening the hood or that you just cant hear it?

I agree with Bruce and Doghead. Start with CARNAC it see what he says.

Open the hood and pull the throttle out to 1500 RPM's and let her heat up. The fan should turn on at 180 plus.

On the motor of my M931A1 (pass side) if a rebuild plate. Same on the trans. There should tags on the drivers door.

Is the canister there or missing just the filter from inside the canister?

IN my 923A2 I use 4. In my 931A1 I use 2. I cant tell the difference in one being better over the other.

With all the respect in this world I say dont complain to much. In Europe we pay €8.500 to €10.500 for a 923A2 This price is in euros with exchange rate at €1,00 to $1.35

WOW did you hit the nail on the head. I have been going crazy trying to figure out the army's logic in this. In europe I see 98% desert tan with black lettering but I have seen some old M35's with white. These trucks have been setting for 10 to 15 years though. What I cant figure out is the...

I use 4 on the 923A2 cause it still uses the orginal batteries. On the M931A1 i use to Big truck batteries group 31.

Hows the truck running?

I am armed with new info. Im going out there today and see how mine is working. I will also look to see if a temp is stamped on the side. If so I think its true you cant adjust them.

Well said. For a second I was thinking this in my head like a end of the world film! haha

The M923A2 turns on slow as not with a burst. The M931A1 has never heated up enough to see it turn on! The old 250 runs allot cooler than the 8,3

On the back it looks like something that would trun. I will get a photo and post it.

I have problems with mine on the M923A2. It turns on late. I think it can be adjusted to turn on at lower temperture or higher. I have checked the TM and found little to nothing. Does anyone know how to adjust them?