How to remove the Thermostat from a Cummins M11 series engine

                              

 Legend
1.Water outlet pipe

2.Gasket

3.Thermostat

 Removal
1.Drain the engine coolant.
Prepare a container for discharge and use it for
filling when installing the thermostat.The amount
of coolant to be discharged should be enough to
avoid coolant from spilling from the housing on the
cylinder head side.

 2.Open the engine cover.(Non-tilt cab model only)

 3.Remove the turbocharger coolant hose.

 4.Remove the radiator upper hose at the radiator
side.
5.Remove the water outlet pipe.
6.Remove the thermostat.

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 Inspection
·Place the thermostat in water,and raise the water
temperature while thoroughly stirring it.
Measure the temperatures when the valve starts
opening and whenit is fully opened.