COMP Cams COMP4-102 ユーザーズマニュアル

 

COMP Cams® 

3406 Democrat Rd. 

Memphis, TN  38118 

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

www.compcams.com 

Part # COMP4-102 

Revised 7/10/06 

Step 11: Position the crankshaft keyway at 12 o’clock, lock the camshafts (keyways facing down) and attach the 
secondary camshaft gears and timing chains, making sure that the timing marks on the secondary gears line up 
with the copper coated links on the secondary timing chains. Return tension to the secondary timing chains by 
removing the pin that was inserted in step 5.  

 

Step 12: Attach the primary camshaft gears and timing chains, making sure that the timing marks on the 
camshaft and crankshaft gears line up with the copper coated links on the primary timing chains.  

Step 13: Torque the camshaft bolts to the factory specification. Return tension to the timing chains following the 
factory recommended procedure. 
  

 

Step 14: Reinstall the rocker arms using the reverse of the procedure outlined in step 6. 

 

F8AZ-6256-AA (RH) 

F1AZ-6278-A 

F1AZ-6A340-A 

F1AZ-6278-A 

F8AZ-6256-BA (LH) 

Secondary Drive Gear 4V → 

F8ZZ-6256-AA 

 
 

Camshaft Degreeing Procedure  

 

The purpose of degreeing a camshaft is to ensure that it is phased correctly with the crankshaft. Some factors 
that may cause improper phasing are: 

 

•  Camshaft or crankshaft gear marked incorrectly 
•  Incorrectly machined cam or crank gear keyways 

•  Misindexed cam keyway or dowel pin 

•  Improper machining of camshaft or crankshaft 
•  Accumulation of machine tolerances 

 

The important factor to remember is that correct camshaft phasing is critical for efficient engine operation. 
COMP Cams® offers all the equipment needed to properly degree in a camshaft, which includes the following: 

 

•  Degree wheel, COMP Cams®  Part #4790 

•  Rigid pointer that can be attached to the engine block, COMP Cams®  Part #4794 
•  Dial indicator with enough range to measure full cam lift, COMP Cams®  Part #4909 

•  Magnetic or attachable base to affix the dial indicator, COMP Cams®  Part #4907 

•  Top dead center stop, COMP Cams®  Part #4795 
•  A means to attach the degree wheel to the crankshaft –COMP Cams® Pro Crankshaft Socket (Part 

#4798) works very well for this purpose, as it provides a convenient means of rotating the engine in 
addition to firmly anchoring the degree wheel in place. 

 

Also required in order to degree your new COMP Cams® 4.6-liter camshafts are a 1” wrench, and solid valve 
adjuster (lifter).