I have a stock 2002 powerstroke. The vehicle has always blew large amounts of white smoke since I go it on startup. Recently it started pushing coolant out of the coolant resevior. I know this is usualy a head gasket, butthe truck does not and has not overheated. And the pressure comming out of the bottle is admazing. I know these engines have a coolant based egr valve, could ths have cracked allow exhaust to be in the coolant system and antifreeze in the exhaust causing the white smoke. The truck runs great and I didn't know if there was a way i could disconnect the coolant line to the egr and test to see if it pushes coolant. thanks for the help.