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International Automotive Technicians Network
Re: Cooling system operation
Posted to HD/Fleet Forum on 5/16/2019

Rule of thumb, anything more than 20 degrees could be a problem. There could be an air lock but by now it should have "burped" . Best to always vacuum fill. If truck has had same driver for a long time and he seems like he knows his stuff there is a problem st... Login to read more.