A blown head gasket could cause an engine to overheat, just like a bad thermostat in an Impala. One difference is the head gasket will probable leak coolant, either in the cylinders or in the oil.
You have a blown head gasket.
perform a pressure test on the cylinders. if they don't hold pressure it's a blown head gasket
I blown head gasket can cause an engine miss which one cause a rough idle.
I'd be suspicious of the thermostat.
thermostat or blown head gasket....
Yes, I blown head gasket will definitely effect the emissions.
No, a normal tune up cannot cause a blown head gasket. A blown head gasket normally is caused by an engine overheating or by a defect in the gasket or head. If it happened right after a tune-up that is just a coincidence.
If the engine fan is working then you could have a defective thermostat or a blown head gasket.
I don't think a blown intake gasket would cause it to overheat, Most causes of overheating are: thermostat stuck in closed position; faulty water pump; broken fan blades; loose belt; clogged radiator; radiator cap not holding pressure; blown head gasket; low or no coolant; leaking hoses.
THE CAUSE COULD BE A STUCK THERMOSTAT , OR A BLOWN HEAD GASKET, OR A LEAK IN THE INTAKE MANIFOLD OR INTAKE MANIFLOD GASKET. A CRACK IN THE INTAKE MANIFOLD IS VERY COMMON.. NORTY
The first place to look would be a blown head gasket, or; a stuck thermostat, bad water pump, low water, bad fan (mechanical and or electric) - all of which could cause a blown head gasket.