Until then, without the facts
, ... here is a different van and engine, maybe or probably the same set up though
You may find this discussion useful
viewtopic.php?f=2&t=233168&p=1870009&hilit=leak+pipes#p1870009Basically saying you have some choices to make when replacing these ... whole assembly or just the o-rings or what ever you have bought.--- which didn't work.
all the best.mark