OER Parts offers a wide selection of Cooling System Components for your 1984 Mercury Marquis. OER Parts offers 1984 Mercury Marquis Hose Clamps, 1984 Mercury Marquis Heater Hose Clamps, 1984 Mercury Marquis Radiator Hose Clamps, 1984 Mercury Marquis Tower Style Hose Clamps, 1984 Mercury Marquis Heat-Shrink Hose Clamps, 1984 Mercury Marquis Corbin Style Hose Clamps, and 1984 Mercury Marquis Radiator & Heater Hose Clamp Set.