ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
Calculate and record camshaft journal-to-camshaft bore oil clearance for each camshaft
journal by subtracting camshaft journal outer diameter from camshaft bore inner diameter.
Camshaft journal-to-camshaft bore oil clearance should be 0.0035 - 0.0055 in. (0.088 -
0.140 mm). Replace camshaft or cylinder block as required if camshaft journal-to-front
camshaft bushing oil clearance is out of specification.
(5) Measure camshaft lobe height as follows:
Measure and record height at widest point on camshaft lobe and height at narrowest point
on camshaft lobe using micrometer. Refer to Figure 5-62.
FIGURE 5-62. MEASURING CAMSHAFT LOBE HEIGHT
Calculate and record camshaft lobe height by subtracting height at narrowest point on
camshaft lobe from height at widest point on camshaft lobe.
Record camshaft lobe height and compare with specifications given in Table 5-3.
Table 5-3. Camshaft Lobe Height Specifications.
Camshaft Lobe Height = Widest lobe point measurement - Narrowest lobe point
Intake Valve Camshaft Lobe Height
0.273 - 0.292 in. (6.93 - 7.42 mm)
Exhaust Valve Camshaft Lobe Height
0.266 - 0.286 in. (6.76 - 7.26 mm)
Repeat steps a and b for all camshaft lobes. Replace camshaft and camshaft followers if any
camshaft lobes are not within specifications.
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