[Steve C.]

Instructions from revised form dated 7-19-2020
Including Comp Cams part number 857-16
Pontiac hydraulic roller lifter



Instructions:
1. Lifter cleaning: Remove your new COMP Cams® lifters from the packaging. The lifters need
to be cleaned with mineral spirits or parts washing solvent first to remove any debris from
shipping or handling. Also check to ensure that the wheel rolls smoothly. NOTE: Rollers may
feel as though the wheels drag more than expected due to the grease packing for assembly
and break-in. This is normal. WARNING: The wheel needle bearings are pre-greased with
special OE grease. While cleaning, be careful to NOT blow out this grease for this is very vital
to initial break-in. Also do NOT clean with aerosol cleaners! And do NOT allow the wheel to
be spun by compressed air.
2. Lifter preparation: It is not necessary to “pre-pump” hydraulic lifters full of engine oil prior
to installation and valve adjustment. It is actually undesirable to do so as the “pumped up”
lifters will cause the valves to open during the adjustment process, rather than positioning the
lifter plunger in its operating position as it is supposed to do. Next, soak the lifters with COMP
Cams® Break-In Oil (Part #1590) or equivalent for at least two hours. Doing so ensures that
the lifters are adequately lubricated on their outer surfaces prior to installation. It may also
result in a quieter engine start-up as the oil in the bath may displace some air from the lifter’s
plunger reservoir. When you install the lifters, make sure they fit well. Any excess clearance or
tight lifters can cause damage to the camshaft, leading to engine failure. Verification of lifter to
lifter bore clearance is recommended. Note: Contact your engine builder or block
manufacturer for your specific clearances.


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