Volvo 2002B Fresh Water Cooling

[Langusto]

I can't get the full four quarts in the darned thing. Is there a trick to this? I seem to have an air lock or something. Should I fill from the thermostat opening? Are the cooling water jackets (pipes) blocked?

[Langusto]

Whew, dodged the bullit. The return hose fitting from the thermostat housing to the resevoir was blocked. This created an air lock that prevented adequate drainage and filling. I also opened the heat exchanger and drained that baby.

As you were.