How does a wax thermostat work?
This most common modern form of thermostat now uses a wax pellet inside a sealed chamber. The wax is solid at low temperatures, and as the engine heats up, the wax melts and expands. The sealed chamber operates a rod which opens a valve when the operating temperature is exceeded.
What are the different types of thermostats?
There are four basic types of modern thermostats: Non-programmable, programmable, Wi-Fi and smart.
Does wax expand when heated?
This wax expands by about 15 percent when melted, then contracts as it cools down and solidifies. The wax can be tailored to melt within a narrow temperature range, and it can withstand thousands of expansion cycles without suffering critical property degradation.
What does the jiggle pin on a thermostat do?
The thermostat jiggle pin is a pin that is located in the small hole in the plate valve of the thermostat and which should always be in 12 o’clock position during installation. It helps bleed the cooling system of trapped air by allowing air to pass into the radiator, after which it can be released from the system.
How does a wax pellet thermostat work?
The conventional wax-pellet thermostat comprises a thermo-sensitive device and a valve device. The thermo-sensitive device includes a steel piston, a guide member slidably engaged with the piston, a rubber diaphragm around the piston, and a wax. The piston is sealed by a sealing device provided in the guide member.
Where is the thermostat located in an engine?
The thermostat is a type of valve that opens and closes automatically according to the coolant temperature. The thermostat is installed between the radiator and the engine cooling circuit.
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.
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.