Why does my Duramax water pump keep overheating?
Why does my Duramax water pump keep overheating?
This seems to be inherent of the factory water pump design. Overheating. Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.
What causes a coolant leak in a Duramax engine?
Failure to inspect the EGR cooler for leaks may lead to a misdiagnosis for coolant entering the combustion chamber. Previously, An EGR cooler pressure tester adapter set, EN-48974, was shipped essential to dealers in December 2007 to diagnose EGR cooler engine coolant leaks on all Duramax™ engines equipped with an EGR system.
What should I drain before replacing the thermostat on my car?
Drain about two quarts of coolant using the radiator drain valve before disconnecting the upper radiator hose from the thermostat shell. This will bring the coolant level to below the thermostat housing and prevent coolant from splashing over belts and other components after separating the upper radiator hose.
Can a bad thermostat cause an engine to overheat?
A bad thermostat can cause engine overheating or not allowed the engine to reach operating temperature. Car thermostat replacement is not difficult. But, you do need to pay special attention to key points in the process. Preparing the surfaces for the new installation Getting the correct thermostat for your application
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.
What happens to the coolant in a Duramax thermostat?
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. The bottom portion of the thermostat is raised off of the bypass port while at the same time the top portion closes the coolant flow to the water outlet.
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.
How much Dexcool to replace a thermostat?
All you need is the two thermostats and right around 3 full gallons of Dexcool thats premixed. Make sure you have tools that can unclip harnesses and such.
