Wax Thermostat With Electrical Heater Element
| ITEM | DESCRIPTION |
|---|---|
| 1 | Electrical connector - Heater element |
| 2 | Hose connection - Engine bypass |
| 3 | Hose connection - Heater core |
| 4 | Hose connection - Electric throttle |
| 5 | Electrical connector - Engine Coolant Temperature (ECT) sensor |
| 6 | Hose connection - Cylinder head and cylinder block outlets |
| 7 | Hose connection - Radiator upper hose |
The wax thermostat independently controls the engine coolant flow to the cylinder head and cylinder block, improving engine warm up times. The wax thermostat contains a wax expansion element that incorporates a heater element. When energized, the heater element heats the wax element, partially controlling the thermostat function along with engine coolant temperature control. Operation is therefore activated not only by the Engine Coolant Temperature (ECT), but as specified by the Powertrain Control Module (PCM). This enables a finer control of the opening and closing of the wax thermostat.