Ok , got the injector thing figured out , had 2 bad injectors , replaced those 2 ran awesome for 2 days , started smoking white , thought the egr cooler crapped out , till this morning went to start it coolant in the cylinder , would the egr cooler allow coolant in the cylinder ? I don't think it would based on the location n the system ? feedback please ? and the head gasket cannot be done without lifting the cab ? correct