Car: 2002 chrysler concorde
Join Date: Nov 2010
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runs hot becuz....
You have air in your engine / coolant system.
The air valve on top of your manifold is not going to remove all the air inside. Which is causing your thermostat to not open sometimes as that air pocket moves around your system.
You need to take it to a mechanic that has a Snap-On or other brand of mechanical vacuum pump with the gauges built in to the tubes etc..
they need to suck ALL THE AIR OUT of your motor- it may take two attempts or more-
like mine did!-- guess what?---problem solved!---only took 2 months of wondering & stress, 1 new radiator, 1 new themostat, 4 new water pump housing o-rings, 1 new water pump, hundreds of bucks and many hrs of time....but my mechanic figured it out-- that Snap-on air pump cost him $350 off the the Snap-On truck...but now every stinkin' molecule of air has been sucked out my motor--and my gauge reads 1 mark BELOW the half point- It feels and runs like a champ- no more stress on me either....and I have an entirely new cooling system..(that I did NOT NEED!) but what the heck it's ok...
So the moral of this story is - if I had known the running hot problem could have been solved by just using that mechanical pump to begin with ( and NOT relying on that little relief valve- I could have saved myself tons of grief and money.
Last edited by lefty247; 11-12-2010 at 06:57 PM.