Does anyone know the proper maintenance schedule for the Aveo water pump? My 07 has nearly 120k on it and will soon be replacing the timing belt again. The manual only recomends the belt every 60k and the coolant at 150k. Any known problems with the Aveo water pumps? Need to decide if I should just replace it and the coolant early at 120k or run the risk it will make 180k. Any ideas out there?