Hi Germain,

Simply fill (coolant) the heater with a very small funnel, put this one into
the bleeder screw:
http://www3.sympatico.ca/huotx/engine/rear_heater_screws.jpg (white one)
until it's full, using a funnel help the air make it's way out around the
funnel small end.

I made a adaptor that screw into the bleeder screw, at the other end of this
adaptor there is a small clear hose, that hose goes into a bucket! This way
i can see the air bubble and i don't make a mess. If you don't make an
adaptor...well, put a rag around the bleeder.

Cheers, Ben
http://pages.infinit.net/eurokit/