Hello Chris,

In my configuration, the HE is before the CAV filter and the Pollak valve is after both of them. So when I change over the cold oil in the cav is still cold. I think if I place another HE after the CAV the valve will be damaged (I could be wrong). But if I place a HE after the valve ... ummm .. both lines will go hot to the lift pump ! is it okay to warm up the diesel too?

Cheers,

Fitian