How to replace the thermostat on a Duramax Diesel?

Remove the 12mm bolt holding the black coolant pipe to the thermostat housing 3. Remove the four 12mm bolts in the thermostat housing. 4. Now we need to loosen the black coolant pipe so we have some play in it. First remove the 12mm bolt holding the black coolant pipe to the drivers side head.

How do you change the thermostat on a Chevy Silverado?

Follow the upper radiator hose to the thermostat housing at the top of the intake manifold. Loosen the hose clamp with a screwdriver and pull off the end of the radiator hose from the thermostat housing. Remove the two bolts on either end of the thermostat housing cover and pull off the cover. Take out the old thermostat.

Where is the bleeder screw on a Duramax thermostat?

Remove the bleeder screw on top of the thermostat housing (circled in picture). Add coolant to the coolant tank on the passenger side between the air box and battery. Mine took about 3/4 of a gallon. When full, coolant will come out of bleeder screw, when this happens, replace bleeder screw and top off tank to appropriate level.

How do you replace the coolant pipe on a Duramax?

First remove the 12mm bolt holding the black coolant pipe to the drivers side head. 5. accessing the 2nd bolt on the coolant pipe is a PITA. First, unplug the two large engine electrical plugs.

How does the front thermostat work on a Duramax Diesel place?

The front thermostat controls the coolant flow to the bypass port and to the water outlet. The rear thermostat only controls the coolant flow to the water outlet. When the coolant temperature is below the rated thermostat opening temperature, the front thermostat valve remains closed to the water outlet and is opened to the bypass port.

First remove the 12mm bolt holding the black coolant pipe to the drivers side head. 5. accessing the 2nd bolt on the coolant pipe is a PITA. First, unplug the two large engine electrical plugs.

What are the thermostats for a 6.6L diesel engine?

As the element is cooled, it contracts. This contraction allows a spring to push the valve closed. The 6.6L diesel engine requires two thermostats for correct coolant flow. The front thermostat is a dual purpose thermostat. The front thermostat controls the coolant flow to the bypass port and to the water outlet.