Gates Timing Belt Component Kits with Water Pump offer customers the best and most complete repair solution by including the same premium components as our TCK's - timing belts, pulleys and tensioners - as well as a water pump. Timing belt driven water pumps should always be replaced at the same time as the timing belt. Don't take chances. With Gates TCKWP's, you can avoid returns by replacing all critical system components at the same time.