12. COOLING SYSTEM GRAND DINK 250 Inspect the radiator soldered joints and seams for leaks. Blow dirt out from between core fins with compressed air. If insects, etc., are clogging the radiator, wash them off. Carefully straighten any bent fins. Overflow Tube RADIATOR REMOVAL Drain the coolant. ( 3-9) Disconnect the air vent tube from the radiator filler. Remove the overflow tube clamp and disconnect the overflow tube. Air Vent Tube Upper Hose Loosen the hose band and disconnect the upper hose and lower hose from the radiator. Lower Hose 12-5