3-18. CAMSHAFT, CAMSHAFT GEAR, AND CAMSHAFT BUSHING - REPLACE (Contd)
a. Inspect fuel lift pump lobe, valve lobes and
camshaft bearing journal for cracking, pitting or
b. Measure bearing journal diameter. Minimum
allowable diameter is 2.1245 in. (53.962 mm).
c. Measure valve lobe diameters at peak of lobe.
Minimum allowable intake valve lobe diameter at
peak of lobe is 1.852 in. (47.040 mm). Minimum
allowable exhaust valve lobe diameter at peak
lobe is 1.841 in. (46.770 mm).
d. Measure fuel lift pump lobe diameter. Minimum
allowable fuel lift pump lobe diameter is 1.398 in.
INSPECT CAMSHAFT GEAR.
a. Discard camshaft gear if measured backlash
(REMOVAL, Step la.) is not 0.003 to 0.013 in.
(0.08 to 0.33 mm).
b. Inspect gear teeth for damage or excessive
c. Check for cracks at roots of gear teeth.
INSPECT THRUST PLATE.
a. Examine thrust plate for damage, distortion or
b. Discard thrust plate if measured camshaft end
play (Removal, step 1a.) is not 0.007 to 0.011 in.
(0.17 to 0.29 mm). Also check for enlarged
thrust plate slot in camshaft if end play is