COMP Cams 84035-16 Race Hydraulic Lifters - Manual

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COMP Cams®
3406 Democrat Rd.
Memphis, TN 38118
Phone: 901.795.2400
Part #COMP4-115
Revised 3/22/12
Toll Free: 1.800.999.0853
www.compcams.com
Pro Magnum™ and Race Hydraulic Lifters
Applicable Part #s: 858-12, 858-16, 862-12, 862-16, 863-16, 865-12, 865-16, 867-12, 867-16, 84000-
16, 84035-16
Thank you for choosing COMP Cams® products; we are proud to be your manufacturer of choice.
Please read this instruction sheet carefully before beginning installation, and also take a moment to
review the included limited warranty information.
The following instructions cover the correct guidelines for installing COMP Cams® Pro Magnum™
and Race Hydraulic Lifters. All Pro Magnum Lifters™ require an adjustable valve train for proper
operation. Through various testing we have discovered that the recommended lifter pre-load should be
set between zero and 1/8 of a turn for optimal performance. Although the method for setting pre-load
on a hydraulic flat tappet and hydraulic roller lifter are the same, the break-in procedure for each lifter
is not. Please review this break-in procedure for flat tappet camshafts.
Important: On hydraulic flat tappet cams that require dual valve springs, the inner spring must
be removed during break-in. Also, we do not recommend the use of synthetic motor oils during
the break-in process. COMP Cams® recommends using Part #1590 (10W30) or #1591 (15W50)
Engine Break-In Oil. Other non-synthetic, heavy-duty motor oil along with COMP Cams® Part #159
Break-In Oil Additive may be used. This allows the lifters to establish rotation and develop a good
wear pattern. As soon as the engine fires, bring the RPM up to 2000 to 2500 during the first 30 minutes
of operation. Slower engine speeds will not supply the camshaft with an adequate amount of oil for the
break-in period. The engine RPM may be varied periodically from 2000 to 2500 to direct oil splash to
different areas of the camshaft. After the 30 minute break-in period, change the oil and filter to be sure
all contaminants from the initial break-in period are removed from the engine. Refill crank case with
COMP Cams Part #1594 (10W30) or #1595 (15W50) Muscle Car & Street Rod Oil or other quality
name brand oil with the addition of COMP Cams® Part #159 Break-In Oil Additive. COMP Cams®
Oil, as well as the Break-In Oil Additive will assist with ring seal during the early break-in period of
your engine. The inner valve springs can now be replaced.
Setting Hydraulic Lifter Pre-load
The correct amount of lifter pre-load is important to help efficiently control the valve train. Insufficient
pre-load will cause valve train noise, while too much may damage the hydraulics of the lifter or cause
low manifold vacuum. By following the four steps listed you will help ensure proper engine
performance and reliability.
Instructions:
1. Lifter Preparation: Remove your new COMP Cams® lifters from the packaging, and clean
the lifters thoroughly in mineral spirits or an equivalent solvent. Remember, in order to protect
your camshaft warranty new COMP Cams® lifters must be installed on flat tappet cams. It is
INSTRUCTIONS