Reach into cylinder block and remove valve
tappets (6) from bores.
Clean camshaft gear, camshaft, and valve tappets in
accordance with paragraph 1-24.
Conduct overall inspection of camshaft gear,
camshaft, valve tappets, cylinder block, and
Inspect camshaft lift pump lobe, valve lobes, and
bearing journals for wear, cracking, or pitting.
Inspect camshaft gear teeth for wear and
damage. Inspect for broken or chipped teeth.
Check for cracks at the root of each tooth.
Measure camshaft journal diameter.
Diameter shall be at least 2.125 in. (53.96 mm).
diameter at peak of intake valve lobe shall be
1.852 in. (47.04 mm). Minimum diameter at
peak of exhaust valve lobe shall be 1.841 in.
Measure lift pump lobe diameter. Diameter shall
be at least 1.398 in. (35.50 mm).
Inspect camshaft bore for damage or excessive
wear. Bore I.D. shall be a maximum of
2.131 in. (54.13 mm). Replace bushing if