How to position the new seals for the Oberdorfer water pump?

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  • Aaz
    Member
    • May 2023
    • 4

    How to position the new seals for the Oberdorfer water pump?

    Hi all, I’m rebuilding my Oberdorfer water pump and have successfully removed the old seals. However, I'm confused about how to position the new seals, that I received from MoyerMarine: Seal set for Oberdorfer 202m7, N202m7 (set of 2) – moyermarine

    Should both be placed with the groove and spring facing the impeller?
  • Al Schober
    Afourian MVP
    • Jul 2009
    • 2031

    #2
    That circular coil spring keeps the lip of the seal pressed against the shaft. The lip does the sealing. The first one you install is a water seal and the lip and coil spring go towards the impeller. The second seal is an oil seal and the lip goes toward the block. The cavity between the two seals drains out the bottom.

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