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Re: how to
Is it possible you might have a blown head gasket? That would sure make a truck get hot in a hurry.
As to bleeding a system of air I ALWAYS drill a 1/8" hole in my thermostat before instaling it. Most thermostats already have a hole in them with a little "T" thingy in it. I cut off the T with a pair of dykes and drill that hole out to 1/8". This does a couple of things. It will let the air bleed past the thermostat as you fill the radiator and it also lets a small amount of water past the thermostat as the motor is warming up so your thermostat will open up a little sooner.
Just a thought.
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