Originally Posted By Rog
The expansion tank is pressurised.


That was kind of my point. The blow-off pressure of an expansion tank is what, around 14psi?

What's the pressure of a fuel system? More like 60psi.

That's why I said it's not under high pressure.

Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE