Abstract: Fan-shroud structure and mounting which compensates for relative movement between an engine and radiator to prevent contact between a rotating fan and the shroud structure. In one embodiment of the invention, a one-piece fiberglass shroud is provided having a generally rectangular end portion which is integral with and merges into an opposed annular venturi portion. The rectangular end portion is secured to a bulbous seal which accommodates the relative movement between the engine and radiator to prevent damage to the shroud. In an alternate embodiment, a one-piece fiberglass venturi shroud is provided having a rounded convergent end section, a throat section and a divergent end section. A box-like outer shroud having an opening therein receives the convergent end section and a bulbous seal is fitted around the opening in the outer shroud for engagement with the throat section.