Installation and Degreeing Instructions 4.6/5.4-Liter 2 and 3 Valve Engines Owner's manual

COMP Cams®
3406 Democrat Rd.
Memphis, TN 38118
Phone: [phone] Fax: [phone]
www.compcams.com
Part # COMP4-103
Revised 7/10/06
Step 10: Rotate the crankshaft keyway back to the 12 o’clock position, and attach the 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 timing chains.
Step 11: Use a 1” open end wrench on the hex bolster in the middle of each camshaft to hold it in place, and
torque the camshaft bolt to the factory specification. Return tension to the timing chains following the factory
recommended procedure.
Step 12: Reinstall the rocker arms using the reverse of the procedure outlined in step 6.
Useful Part Numbers*
4.6L 2 & 3 Valve Camshaft Gears Camshaft Gear Spacer 12 MM Camshaft Bolt Cam Bolt Washer
F8AZ-6256-AA (RH) F3AZ-6265-A F1AZ-6A340-A F1AZ-6278-A
F8AZ-6256-BA (LH) (2 required) (2 required) (2 required)
* Note that these are Ford factory part numbers, not COMP Cams® part numbers.
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 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).