Coolant Expansion Tank
WARNING: This page is about a different car, the 2019 Jaguar XJ and 2018 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.
| ITEM | DESCRIPTION |
|---|---|
| 1 | Filler cap |
| 2 | Vent hose connection |
| 3 | Expansion hose connection |
| 4 | Level sensor |
The expansion tank is installed in the engine compartment, on the left upper suspension housing.
A filler cap and level sensor are incorporated into the expansion tank. A MAX level marking is molded into the interior of the tank below the filler cap. Cold fill levels are molded onto 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 liter (1.06 US pints), above the MAX level, to allow for coolant expansion.