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Close, you forgot a few things..... hydraulic engines ( in our engines since they are push rod engines) still have push rods.... the hydraulic part is the lifter itself with the use of a multi part lifter ( which rides on the cam lobes, which it turn pushes the push rods, with pushes on the rocker arms, which actuate the valves) contains valving, that opens and closes oil passages within the lifter allowing it to automatically adjust itself to be able to run at 0" valve/rocker arm clearance... hydraulic cams have a little bit longer duration, which allows for the necessary amount of time ( with is very little) for the valve in the lifter to "lock up" by way of hydraulic pressure as the valve closes trapping oil in the lifter, essentially turning it "solid" until it reaches the low part of the lobe again, 468Δ–ich it repeats the process all over again.... Todd Daley 71 Squareback 71 Fastback Karl Samuelson wrote: > They lift the valves with hydraulics, as opposed to push rods. > > oofacts@earthlink.net wrote: > > > > Someone want to give me a simple explanation of Hydraulic lifters? What do > > they lift? What are they hydraulic, as opposed to.... ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/