3. INSPECTION/ADJUSTMENT MXU 550EXi/MXU500i Check for any coolant leakage from the water pump, radiator hoses and hose joints. Check the radiator hoses for cracks or deterioration and replace if necessary. Check that all hose clamps are tight. Check the radiator air passages for clogs or damage. Straighten any bent fins, and remove insects, mud or other obstructions with compressed air or low water pressure. Replace the radiator if the air-flow is restricted over more than 20% of the radiating surface. 3-30