Performance engine preparation Cam timing Check accuracy of

Performance engine preparation Cam timing Check accuracy of TDC mark Use a positive stop to determine Rotate crankshaft each direction Difference is TDC Performance engine preparation

Timing a cam using the intake centerline Install degree wheel on damper Dial indicator on #1 lifter (retainer for OHC) Zero indicator at valve wide open Back engine up turn, then clockwise to .050 short of zero. Make note of number on wheel

Performance engine preparation Timing a cam using the intake centerline Continue clockwise to .050 past zero & make note of this reading Intake centerline is halfway between the 2 readings Performance engine preparation

Timing a cam using the intake centerline Cam timing can be advanced with offset bushing or key Performance engine preparation Piston-to-valve clearance Assemble entire valve train for cyl #1, using light

springs on the valves Adjust valves to proper lash Check clearance before & after TDC during overlap Should be a minimum of .100 Proper geometry