What are the first signs of a blown head gasket?
One way that a head gasket failure could cause overheating would be if the gasket failed between a combustion chamber and the cooling system. Combustion gasses could leak into the water jacket and displace coolant leading to the overheating.
Will a blown head gasket overheat at idle?
For sure, if it just blows between cylinders it wont overheat. If it blows directly out the side of the gap cylinder head and block, if it blows just into an oil gallery it will just pressurise the crankcase. If it blows just between oil gallery and coolant gallery it will mix the two but not overheat.
Can you have a blown head gasket without overheating?
You can for a LITTLE WHILE in any case, and you MIGHT be able to drive for months with a leaky head gasket. IF just depends on where the leak is. If water is leaking into the oil, it will take quite some time, if it's a slow leak, to ruin the engine, a few weeks or regular driving at least.
How long can you drive with a small head gasket leak?
Can a car be fine after overheating?
How do I stop my head gasket from blowing?
How long can a car overheat before damage?
Will a car still start with a blown head gasket?
Can an engine recover from overheating?