Dr REBUILD's Corvette Parts Tip

HOW TO REPAIR CRACKED HEATER and AC BOXES

 
Thoroughly clean off paint, oil & dirt. Grind up scrap dark gray hard plastic for filler. Mix this with clear epoxy cement and fill in the cracks. For larger areas, it may be necessary to cut scrap plastic pieces to fit the damaged area. Cut with hacksaw and grind to fit. It may require several applications to completely fill these areas. Build up this filler above the actual surface of heater box. After epoxy filler has cured, use wet-dry sandpaper ( use it wet ) to restore the original contours. Use a small sanding block on flat areas to remove surface irregularities. Refill and sand as necessary. Finish with a few spray coats of clear semi-gloss polyurethane This last step will restore that semi-shiny finish. Lastly, do not over tighten the mounting nuts.

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