Long Stroke Water Pump Upgrade
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  • 1 Post By gerrypro

Thread: Long Stroke Water Pump Upgrade

  1. #1
    Fellow Frogger! citroenthusiast's Avatar
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    Apr 2014
    Phoenix, Arizona USA

    Default Long Stroke Water Pump Upgrade

    I found that the ceramic seat from a Chinese KY Model 108-15 shaft seal (ordered from Amazon) was a perfect fit for the 1911cc water pump, so I counterbored the pump housing 27.0 Ī 0.1 mm x 5mm deep and installed the seat. Now the water pump seal will run on a ceramic seat instead of the raw aluminum. It should now be leak-free for many miles. (The measurements written on the body are so I can calculate the thickness of the spacers under the seal to get the correct compression.)

    Long Stroke Water Pump Upgrade-water-pump-counterbore.jpgLong Stroke Water Pump Upgrade-water-pump-seat.jpg

    John T.

    54 11BL; 61DS19 LHM (son's); 71DS21 BVH; 73SM 3.0; 73SM 2.7EFI; 73SM 3.0 (other son's); 74 Maserati Merak

  2. #2
    1000+ Posts gerrypro's Avatar
    Join Date
    Nov 2010
    Camperdown 3260 Australia


    That is brilliant. Would probably work for the pumps on the later 11 'Perfo' engines as well! The seals on those engines are the same as a 1911 D engine but they run onto the cast iron of the pump!
    citroenthusiast likes this.
    Cheers Gerry

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