With a hydraulic roller valvetrain, you have a lifter that has
a roller wheel that rides on the camshaft as it rotates to actuate the valves.
The lifter body itself is filled using pressurized oil from the oiling system
to maintain the correct valve lash at the rocker arm.
There are generally three types of lifter failure you can
see. First, being failure of the lifter from incorrect oil weight which will
results in oil not entering the lifter quick enough to lubricate properly, resulting
in a collapsed lifter. Second, the lifter retaining pin having too much play
from the factory which will result in a lifter spinning in the bore and eating
the camshaft, resulting in engine failure. Third, being that debris will get
caught in the bearing of the roller which will cause it to stop rolling and
destroy the lobe of the camshaft resulting in engine failure.
Hamilton Cams has resolved this issue with this flat tappet conversion
kit. The kit is compete with a 178/208 forged camshaft, DLC coated steel
tappets, upgraded pushrods, and adjustable rocker arms with DLC coated
trunnions. With this upgrade, it will result in the continued reliability from
the trucks of years past.
This kit works on stock trucks with no other modifications
required.
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