Well, here's my 2 cents. Burping the cooling system as Alfasrules described, is the way to go for removing air & lowering the temperature.
These are "old school" cars & they've just not caught up with modern technologies.
, so the "old school" approach just might work.
But who cares, it's just an opinion.
"No chance, no destiny, no fate can circumvent, change or control the firm resolve of a determined soul"
80 BMW e21(Sold, gone to Houston)
79 Spider (sold)
78 Spider (sold, gone to U K)