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I will check out the egr coolers Thanks

Will do.thanks

Update. I think it might be headgasket after all.when full of coolant it is bubbling when engine is running,it boils at a later stage.when I open bleed screw it constantly let's air out. I can't think of anywhere else where air can get in constantly Thanks for all your replies so far.

There might be a small blockage some where and the waterpump is not strong enough to get around it. When I put the hose pipe through the rad it flows ok.

Hi all.First time here. I just purchased a 2007 3.6 v8 diesel with overheating problems. I have changed water pump and thermostat and still the same. So removed both thermostats and still coolant not cicirculating. Bottom pipe cold and top one boiling.i have bled the coolant so many times now...