Coolant Expansion Tank
| ITEM | DESCRIPTION |
|---|---|
| 1 | Filler cap |
| 2 | MAX and MIN level markings |
| 3 | Mounting lug |
| 4 | Supply hose connection |
| 5 | Coolant level sensor |
| 6 | Mounting lugs |
| 7 | Bleed screw |
| 8 | Vent hose connection |
A pressurized expansion tank system is used which continuously separates the air from the cooling system and replenishes the system through a hose connected between the expansion tank and the thermostat. A continuous vent into the expansion tank, through a hose connected to the radiator, prevents air locks from forming in the cooling system.
The expansion tank is attached to the front end carrier in the front left corner of the engine compartment. A filler cap, bleed screw and level sensor are incorporated into the expansion tank. MAX and MIN level markings are molded into the exterior of the tank.
The expansion tank provides the following functions:
- Service fill.
- Coolant expansion during warm-up.
- Air separation during operation.
- System pressurization by the filler cap.
The expansion tank has an air space of approximately 0.5 to 1 liter (1.06 to 2.11 US pints), above the MAX level, to allow for coolant expansion.