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Re: Cams



At 10:05 AM 2/18/97 -0800, you wrote:

>Could someone please explain to me the difference between a solid and
>hydraulic head or lifter or whatever?
>
>John
>80 Scirocco S

        On solid lifter motors there the lifter (the piece of metal that is
between the cam lobe and the valve stem) is solid and need to be shimmed
using different size spacers in order to keep the gap between the cam lobes
and the lifter to the desired amount.
        Hydraulic heads have pressurized oil adjusting the gap between
lifter and cam lobes.  Hydraulic head motors run no clearance between the
cam and lifter because of this.  When the lifters get old in these motors
they begin to tick because they can no longer maintain the zero clearance
that they were designed for.

					DOM!
					1980 VW Scirocco S
					1983 Alfa Romeo GTV-6
					1986 Kawasaki 600 Ninja
					1979 Piaggio Vespa P125X

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