Your Diesel Truck Is Overheating and You Don't Even Know It
About this episode
Will and Myer discuss the factors affecting diesel truck overheating, focusing on coolant and transmission temperatures during towing.
It's towing season and if your gauges are climbing on the way up the grade, you need to know what's actually normal and what's a real problem. Will and Myer break down coolant temps, transmission temps, and everything that can push a Dodge Cummins diesel truck out of range while towing. They start with what a healthy cooling system looks like going down the road. Thermostat opening temps on these trucks typically run 180 to 200 degrees depending on year and setup, and they explain why a hotter or cooler thermostat matters for winter heat versus summer towing, along with how boiling points, radiator cap pressure, and elevation all affect what your coolant temperature can handle. A big part of the episode covers fan clutches, since a bad cooling fan clutch is usually the first thing they check when a diesel truck runs hot. They explain how to tell if your mechanical fan clutch is engaging and why electric fans aren't actually an upgrade over the factory setup on these Cummins trucks. From there they walk through testing a thermostat the old school way with a pot of boiling water, the bypass port a lot of guys don't know exists in the block, and why a genuine Cummins thermostat is…
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