Recommended every 24 to 36 months.  The process starts with a thorough BG Cooling System Flush to dissolve and remove accumulated deposits of rust, scale and sludge.  Then we refill the system with OEM spec coolant supplemented with BG Cooling System Conditioner to protect the aluminum surfaces inside the radiator and extend the life of the water pump, heater core and hoses.  BG Cooling System Sealer is added to seal any minor leaks and prevent head gasket seepage.  Finally, we perform a complete inspection, with all cooling system components checked including belts, hoses and thermostat.