Thread: Any Diesel or tractor mechs on here?

Originally Posted by cambo

Could even just be something as simple as a stuck thermostat creating a blockage.
Or water pump vanes have fallen off and coolant isn't flowing properly. From memory some JD pumps use a plastic impellor

1 Question? Why take W/pump belt off then run it? Kinda making an issue there by not allowing the coolant to flow properly.

To see if the pipe is blocked somewhere and the pump is building up pressure, that was my first guess. Without the pump running the only other way getting pressure in there would be engine leak.
Cooling system was cold and engine only ran 30 sec and started pushing out coolant.