when hot, over-flowing from expansion tank.Problem started when,cooling
system drained & changed anti-freeze,till then running o.k. Since 1st
problem, have changed cyl head(vacuum & pressure tested & skimmed)Used
merc gasket & new bolts & still the same problem,New thermostat no
difference.Radiator checked o.k.dont know if fan is cutting in.Can you
Could it be air bound?
The problem arose only after the coolant was drained and replaced.
Some cars get an air bubble trapped in the cooling system that needs to
be bled out. This car may be one of those.
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