COMP Cams 3149KT Adjustable Timing Sets User Manual
Instructions
COMP Cams®
3406 Democrat Rd.
Memphis, TN 38118
Phone: (901) 795-2400 Fax: (901) 366-1807
www.compcams.com
Part #184
Revised 2/3/09
Adjustable Timing Sets
Part #3100KT, 3110KT, 3146KT and 3149KT
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.
Tools and Supplies Needed:
• 1/4” Hex bit socket or hex wrench
• Torque wrench
• Hammer
• Sleeve to fit over crankshaft for installing crankshaft sprocket
• Degree wheel (optional but recommended)
• Assembly lube or camshaft lube
• Thread locking compound (Loctite)
• Timing cover
1. Prepare the engine. Loosen all rocker arms so that the camshaft can rotate freely.
2. Clean everything! Make sure that the engine mounting surfaces and timing set components are as
clean as possible. The life of the chain and sprockets depend on it.
3. Mount the crankshaft sprocket. Select the appropriate keyway for the camshaft timing baseline
desired. We recommend the Standard Timing position, which uses the round timing mark and round
keyway mark. Carefully tap the sprocket onto the crankshaft using a sleeve to protect the sprocket.
Make sure that the sprocket is fully seated on the crankshaft. Rotate the crankshaft until the appropriate
crankshaft sprocket timing mark is in the 12:00 position. Make sure that the number one piston is at
Top Dead Center. (See COMP Cams® tool Part #s 4789 and 4920).
4. Insert the adjustable timing bushing. Insert the offset bushing (with the hex hole) into the slot in
the camshaft sprocket hub. Rotate it with a 1/4” hex wrench so that the timing mark on the bushing
points away from the center of the hub. The adjustable bushing is infinitely adjustable so you can fine
adjust your engine’s CAMSHAFT TIMING to EXACTLY WHERE YOU WANT IT.
5. Mount the camshaft sprocket. Loop the chain over the camshaft sprocket. Align the camshaft and
crankshaft timing marks, and loop the chain around the crankshaft sprocket. Lift the camshaft sprocket
into place on the camshaft with the *thrust bearing and adjustable bushing in place. Be sure that the
timing mark aligns with the crankshaft timing mark and that the thrust bearing race has not slipped off
of the shoulder on the sprocket hub. Bolt it in place using the three (3) 5/16”-18 x 3/4” hex socket head
cap screws supplied. Install these bolts slightly loose.
*Not used in all kits.
INSTRUCTIONS