COMP Cams 4943 Camshaft Degree Kit for Ford 5.0L 4V - Manual (Page 3)

COMP Cams ®
3406 Democrat Rd.
Memphis, TN 38118
Phone: (901) 795-2400 Fax: (901) 366-1807
www.compcams.com
Part #COMP4-170
Revised 6/28/13
8. Position the dial indicator mount so the tip
will contact the retainer of the intake valve.
It is important that the indicator plunger be
parallel to the valve stem. Any variance in
the angle of the indicator will introduce
geometric errors into the lift readings.
Begin with the intake cam on Cylinder 1.
9. Rotate the engine in the normal direction of
rotation until you reach maximum lift. The
dial indicator will change direction at the
point of maximum lift. At this point, set the
dial to zero.
10. Note: The hydraulic lash adjuster will
typically bleed down as you lift the valve, you can see this happening when you stop rotating the
engine, but the dial indicator continues to move. Watch the dial indicator and make sure it has stopped
moving, indicating the bleed down process has completed.
11. Back the engine up (opposite normal rotation) until the indicator reads .100". Next, turn the engine
forward in the normal direction of rotation until the dial indicator reads .050" before maximum lift.
Record the degree wheel reading.
12. Continue to rotate the engine over in its
normal direction of rotation until the
indicator goes past zero to .050" on the
closing side of maximum lift. Again,
record the degree wheel reading.
13. Add the 2 numbers together and divide
by 2. That number will be the location
of maximum lift of the intake lobe in
relation to the crank and piston. This is
the intake centerline. For example: The
first degree wheel reading was 96˚. The
second reading was 116°. These two
numbers (96 + 116) added together will
be 212. 212 divided by 2 will equal 106.
Your actual intake centerline is 106°.
Reference back to your cam spec card
and see what the recommended intake centerline is.
Cylinder 1 Exhaust
Cylinder 1 Intake