OER Parts offers a wide selection of Heater Parts for your 1985 Buick Century. OER Parts offers 1985 Buick Century Expansion Valve, 1985 Buick Century Hose Clamps, 1985 Buick Century Hose Fittings, 1985 Buick Century Hoses and Lines, 1985 Buick Century Vent and Duct Parts.