The heater core is not the only concern for bleeding of trapped air. If any
air is inroduced any where in the cooling system at all, it could eventually
wind up causeing problems. That is why I suggested parking on a hill and
allowing it to burp, as it were.

At any rate, good luck.

John Rodgers
88 GL Driver

Dennis Haynes wrote:

> The heater system does not need any help getting bleed if the hoses are
> flowing the water in the right direction. Elimination of that plug is a
> blessing. It has a nasty habit of having the head snap filling the back
> of the van with coolant.
>