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Old 10-30-2019, 01:06 PM   #25
Mike72gmc
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Join Date: Jun 2019
Location: DISCOVERY BAY, CA
Posts: 3
Re: Do thermostats have a break in period?

On some vehicles, make sure that when bleeding the cooling system that the heat is turned on. Some vehicles have a valve that restricts or stops water flow through the heater core. Not necessarily needed in this case but as a general rule of thumb so that the whole cooling system has the air flushed out. Air in a cooling system is bad. Last note, use radiator shrouds as they force the air through the radiator rather then recycle air around the engine compartment.
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