Overheating to shot down after 6 minutes of driving. At idle it can run for ever and no heat coming from dashboard vents with heater on.
Water pump is good
Head gasket is good
New coolant filter
Can it be the air compressor?
No heat coming - get a Napa head gasket test kit
Does it create a lot of pressure in the overflow tank? Is the overflow tank sooty?
Check the radiator surface with a temp gun- is it hot all over- does it have any cold / hot spots