A good hydraulic lifter will feel quite solid when pressing down on it.
It takes considerable pressure over a long period of time to collapse the
lifter. Otherwise all your valves would clatter on startup. I am not
convinced that you will be able to tell if you have hydraulics by this
method.
Doug Leithauser
> One way to figure out what lifters you have is to remove a cover and push
> down on the pushrods of the completely closed valves. If they move down
> slightly and feel springy then they are hydraulic, if they feel solid
then
> they are solid lifters.
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