Instruction Manual

COMP Cams®

3406 Democrat Rd.

Memphis, TN 38118

Phone: (901) 795-2400 Fax: (901) 366-1807

www.compcams.com

Part #COMP4-139

Revised 1/21/11

Tool Steel Lifters

Available Part #s: 89842H-1, 89842H-12, 89842H-16, 89842-1, 89842-12, 89842-16, 89842C-1, 89842C-12,

89842C-16, 89904H-1, 89904H-12, 89904H-16, 89904-1, 89904-12, 89904-16, 89904C-1, 89904C-12,

89904C-16, 89875H-1, 89875H-12, 89875H-16, 89875-1, 89875-12, 89875-16, 89875C-1, 89875C-12,

89875C-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.

Part #s 89842, 89875, and 89904 are non-coated tool steel lifters for use with cast camshafts that may or may

not be nitrided.

Part #s 89842C, 89875C, and 89904C are DLC coated tool steel lifters for use with steel camshafts.

Part #s 89842H, 89875H, and 89904H are non-coated tool steel lifters with a 0.012" oil hole in the face of the

lifter for use with cast camshafts that may or may not be nitrided.

Proper Camshaft Break-In

Proper flat tappet camshaft set-up and break-in, as any engine builder knows, are keys to the life of a camshaft,

both short and long term. The correct procedure allows the lifters to establish rotation and develop a good wear

pattern.

Pre-Installation

Remove the camshaft from the box, and clean it with mineral spirits or a parts washing solvent, then perform a

visual inspection immediately. Look carefully for dings, dents, deep scratches, or any other defect that may be

detrimental to the break-in or long-term life of the camshaft. Pay special attention to the lobe and journal contact

surfaces and distributor gear. Before installing the camshaft apply an ample amount of the supplied camshaft

and lifter installation lube (COMP Cams® Part #153) to the lobes, journals, distributor gear, and lifters.

Break-In Preparation

Always remove the inner spring during break-in when using dual valve springs, or if you have a high load single

spring, use a lighter spring. An alternative solution that addresses this same concern is using a set of low-ratio

break-in rocker arms. Both of these solutions provide your best chance of proper camshaft break-in and long

term durability. While these tips may be a slight inconvenience, a little time and effort on the front-end is much

better than destroying your new engine. NOTE: Many engine builders omit this step when using DLC

coated lifters without expecting increased failure rates.

INSTRUCTIONS

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INSTRUCTIONS Tool Steel Lifters Available Part #s: 89842H-1, 89842H-12, 89842H-16, 89842-1, 89842-12, 89842-16, 89842C-1, 89842C-12, 89842C-16, 89904H-1, 89904H-12, 89904H-16, 89904-1, 89904-12, 89904-16, 89904C-1, 89904C-12, 89904C-16, 89875H-1, 89875H-12, 89875H-16, 89875-1, 89875-12, 89875-16, 89875C-1, 89875C-12, 89875C-16 Thank you for choosing COMP Cams® products; we are proud to be your manufacturer of choice.
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Proper Procedure 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 again to be sure all contaminants and break-in lube are removed from the engine.