I cannot seem to remove front bumper to get out of the way for a radiator replacement. Any tips please? I removed screws by tires and pulled back the splash guard. I see a bolt but either it is stripped or a mystery size. The closet fit is a 7mm. 2000 Dodge Grand Caravan Sport. Has hole in upper radiator and I have purchased replacement. I cannot seem to be able to remove the bumper which needs to come off for me to get full access to radiator and hoses.