Camshaft and Timing Gear Train
NOTE: It is not necessary to remove cylinder head from
engine for camshaft removal. If push rods are
bent or show excessive scuffing, it may be
necessary to remove cylinder head for inspection
of block, head, cam lobes and cam followers.
1. Drain engine oil and coolant, if not previously done.
Remove timing gear cover as detailed earlier in this
Timing Marks--Camshaft and Crankshaft Gears
2. Rotate engine flywheel with JDE81-1 or JDG820
Flywheel Rotation Tool and lock engine at No. 1
cylinder's "TDC-Compression" stroke with JDE81-4
Timing Pin. Timing marks (A) on camshaft gear and
crankshaft gear should be aligned.
If timing marks are not aligned, remove timing pin and
continue to rotate engine until marks align. Timing pin
should enter hole in flywheel. Engine will be locked at
No. 1 "TDC-Compression" stroke.
3. Remove rocker arm assembly and push rods. (See
Group 05, Cylinder Head and Valves.)
4. When removing camshaft with engine on rollover
stand, roll engine to a position where followers fall
away from camshaft lobes (oil pan side up) or hold
cam followers away from lobes with D15001NU
Magnetic Holding Set.
Continued on next page