Question about 2001 Subaru Legacy
The thermostat has already been replaced, and there was a coolant flush on it. It was also checked for a bad head gasket but it was all fine. Coolant in reservoir is not being sucked in. And I DO have heat.
Did you flush the radiator as well? On a hot engine, the bottom hose should be more than cold, at least pretty warm. Check for radiator blockage.
Correct mixture of anti-freeze and water?
Was the coolant system pressure tested? The system holding a pressure of about 15 psi, is what makes the coolant return from the reservoir. Like this: When engine is shut off, the hot coolant contracts as it cools. So the level in the radiator drops a little. If the system is sealed, this creates a vacuum in the top of the radiator. The vacuum sucks the coolant back into radiator through the reservoir return hose. The radiator cap seal should hold the pressure in. But if there is a leak somewhere, the pressure will not hold. Coolant under pressure raises it's boiling point by an additional 10-15 degrees.
So I would check the radiator, and have a simple pressure test done (if you haven't already).
Posted on Nov 27, 2013
How's the water pump?
Posted on Nov 27, 2013
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Posted on Jan 02, 2017
check oil colour(milky indicates water)check radiator,can you smell fumes in there,get it tested with and exhaust gas annaliser,which picks up engine fumes in the radiator if you cant tell for sure,it does sound like you have a head gasket problem,you would need to do both heads not 1
Posted on Oct 29, 2009
Sometimes after changing the coolant, people (like me) decided to fill the radiator ... only to find the car overheated like a candle.
When you fill the car, DO NOT fill the radiator first. Pull the top hose off, and fill the engine (via the hose) with coolant. Once that's full, shove the hose on and then top off the radiator.
Solved the problem for me. Has never overheated since.
Posted on Dec 26, 2009
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