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More lash cap info:
How the lash cap is installed is also important as it will technically fit both ways, however only one way is correct. The lash cap should be installed on top of the lifter which pushes up towards the sky (cap goes down towards the floor) and the fuel pump plunger will sit down on top of it.
This will fill the gap .059 -.060 created by the smaller base circle of the cam fuel pump lobe. If the cap is placed on to the bottom of the pump the lash cap will not properly seat and will take up more space and add preload.
The lash cap being installed upside down might cause the travel to max out and potentially crack the valley pan and/or pump flange.
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