Hobson72

Cheers Josh I'm going to change the matrix so that the entry and exit pipes are at the highest point.

Hi everyone I had a Legacy engine fitted in my 1972 VW Bay Campervan 2 years ago by Andy Raw at TSR. A fantastic replacement that has transformed the performance and reliability of my camper - 2 European trips to France, over the Alps then down into Italy. I am awestruck by the power and reliability of the engine. I have fitted a Subaru heater blower in the front, but because the heater matrix is higher than the header/overflow tank, I can't vent the system - so there is no heat in the matrix. I have fitted a return bypass loop as I know that the engine relies on this. There is great heat racing round the pipes and the bypass loop, but no further. If I shut the bypass loop, the hot water stops flowing. I've tried adding a 12 volt pump to get the water through the matrix but with no luck so far. HAs anyone overcome this airlock before?