overheating on 1990 Subaru Legacy

all the coolant is in the overflow reservoir. is the problem the thermostat?

by in Anchorage, AK on March 09, 2010
1 answer
ANSWER by , March 09, 2010
The system is pressurized so if the radiator cap won't hold the recommended pressure it will release it into the overflow tank, So start with a new cap but don't remove this when the engine is hot