A valve stem seal assembly has a valve stem seal and a top sealing valve seal retainer that extends down the outside of the valve stem seal from its top, where a plurality of heat dissipating features are unitarily formed about the outside of the retainer. The heat dissipating features are selected from a group consisting of fins and corrugated alternating indentations and protrusions. The valve stem seal may be formed from a nanocomposite material that includes a polymer host material and a nanomaterial that includes chemically functionalized carbon nanotubes. The valve stem seal is in sealing contact with the engine valve stem. Such a valve stem seal could replace conventional valve stem seals in all valve stem seal assemblies, no matter what the shape and placement of the oil and gas lips.