BMW E12 / E21 / E28 OES Graf Water Pump

 found on the following vehicles:

E12: Details on E12
E12 518 Sedan, Euro
E12 518i Sedan, Euro
E12 520 Sedan, Euro
E12 520i Sedan, Euro

E21: Details on E21
E21 320i Sedan, U.S.
E21 315 Sedan, Euro
E21 316 Sedan, Euro
E21 318 Sedan, Euro
E21 318i Sedan, Euro
E21 320 Sedan, Euro
E21 320i Sedan, Euro

E28: Details on E28
E28 518 Sedan, Euro
E28 518i Sedan, Euro

• All the component parts fitted are pre-tested to evaluate durability, performance and reliability.
• The bearings undergo a durability test equivalent to nominal lifespan and are then inspected to assess integrity.
• The mechanical seals are tested in extreme coolant temperature conditions according to predefined cycles.
• The shape of the impellers is optimized thanks to the use of prototypes on which flow and performance tests are performed.
• On both the entrainment parts and the bodies, the choice of materials and/or technologies different to original ones is made on the basis of structural and mechanical tests.
• After assembly all the pumps undergo seal tests on units that reject those with leaks above set limits.