Audi A8 Water Pump - 1997-99 - 8 Cyl 3.7L Engine

Graf water pump and gasket with metal impeller

About Graf Water Pumps: Graf water pumps and components are pre-tested to evaluate durability, performance and reliability. The bearings undergo a durability test equivalent to the average water pump lifespan and are then inspected to assess integrity. The mechanical seals are tested in extreme coolant temperature conditions according to predefined coolant water pump cycles. The shape of the impellers are optimized thanks to the use of prototypes in which flow and performance tests are performed. After water pump assembly all water pumps undergo reliability tests using equipment able to determine true water pump performance and reliability.