How do hydraulic lifters work?

Discussion in 'Engine, Fuel and Exhaust' started by TQuentin1, May 21, 2009.

  1. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

    I started wonderin' about this when I was having all that noise I thought was valve tapping. So when I changed out the lifters in my UC this last weekend, I pulled one apart to see what was inside. The pix are below.

    And here is a pretty cool animation that shows a lifter in operation:

    YouTube - hydraulic tappets (hydraulic lifters)

    Finally, here is a pretty good explanation of how they work. This is from a VW, so don't pay any attention to the actual numbers and specification provided. The description of the operation of the lifter is what's important.

    Hydraulic Lifters