A screen door for a cooling package of a vehicle that includes proximal and distal frame posts, screen surface, torsion bar, stationary support, torsion bracket and fastener. The proximal frame post is hingedly coupled to the cooling package, and the distal frame post can be hingedly coupled to a secondary door. Proximal end of torsion bar is fixedly attached to proximal frame post, and distal end is moveable relative to the distal frame post. Stationary support is fixedly attached to distal frame post. Torsion bracket is fixedly attached to distal end of torsion bar, and is moveable relative to stationary support. Fastener maintains torsion bracket in a desired position relative to stationary support. Movement of torsion bracket relative to stationary support applies an adjustable torsion on torsion bar, and fastener maintains the adjustable torsion. An adjustment member can be attached to fastener between torsion bracket and stationary support.