On Aug 22, 4:28*pm, 5Z wrote:
Also, be sure to leave a pretty big air bubble inside. *Without that
it WILL blow the gasket at altitude.

-Tom

It might blow a gasket if filled all the way due to hot temperatures
and no expansion space. If it was altitude related leaving a larger
air bubble would make problems due to pressure differential at
altitude worse not better. Right?

Darryl