BTW, I was somewhat confused by the cooling system when I first got the car and Dave W (Thanks Dave) kindly provided this schematic which whilst based on his Series 1 car is virtually identical to my Series 2 car.
It clearly shows the water flow and how the expansion tank fits into the system. My system is filled via the expansion tank.
![[Linked Image]](https://tm-img.com/images/2023/12/27/2734.jpeg)
