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Thank you, that helps a lot!

Hi all, I have a 1990 m931a2 that I thought had a coolant problem but after putting a laser temp gauge on the radiator pipes and block the gauge is appearing to be about 70 degrees off. Can anyone tell me or preferably send pictures of the location of the coolant temp sender? Also where I can...

Update.... first and foremost thanks for all the great reply’s, I greatly appreciate the help! With that said, I purchased a laser temp gun and got the truck gauge up to 200 degrees and then put the laser on certain parts of radiator hoses. Nothing was over 135 degrees. So I guess this means...

Ok I will check that out thank you. I did just replace the belt. Also, the shutterstat is bypassed so the fan stays on.

I’ll look into that thank you

thank you, and yes I think I’m going to start with the temp gauge then try the flush. After that I will look into the water pump.

Hi guys first post here. I recently purchased a 1990 m931a2 with a custom lift bed, and roughly 10,000 miles. I’m pretty new to these trucks so bare with me. Anyways after fixing a few miner problems air leak, fuel leak, etc. I can’t seem to figure out how to fix or diagnose this temperature...