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6BT5.9M2 Running Hot

Dave F

New member
I have noticed over the last couple of months that the temperature of one of my engines has slowly been getting hotter under load. The engine will run fine up to around 2000rpm with a minor temp rise from 75 C, but rises up to a temp alarm if I exceed these revs for about 10 minutes. I have also noticed that the water overflow tank is slowly getting lower.
I have rebuilt the water pump, changed the thermostat and radiator cap, and cleaned the heat exchanges with no difference noted.

Open to suggestions of what to do next?
 
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