Heater Control Valve Rebuild Service, 1961-63 Buick Special, Oldsmobile F-85 Heater control valve rebuilding service for 1961-63 Oldsmobile Cutlass and F-85, and Buick Special and Skylark. You must send in your heater valve for rebuilding. A core deposit of $150.00 applies to any heater valve sent out in advance of our receiving your rebuildable core unit.