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Posted by Mike Hernke [166.147.104.26] on Tuesday, November 20, 2012 at 20:14:48 :
In Reply to: Re: What is that thing for? posted by Paul(in NY) [12.64.126.113] on Tuesday, November 20, 2012 at 18:40:24 :
I think most new thermostats have what is essentially an air release (jiggle valve). I have a truck with a leaky overflow and when air gets trapped the thermostat won't heat properly and the truck gets very hot then when the thermostat opens it cools rapidly. I think if the radiator is well above thermostat like a power wagon once air is out no problem my newer truck the radiator is even with thermostat and of course no overflow.