Dodge RAM 1500 1998 Owner's Manual page 1493

9 - 270 ENGINE 5.9L DIESEL
CAMSHAFT & BEARINGS (IN BLOCK) (Continued)
INSPECTION
Camshaft
(1) Inspect the valve lobes and bearing journals for
cracks, pitting, scoring, or generally excessive wear.
Replace any camshaft that exceeds the allowable lim-
its.
(2) Measure the bearing journals and lobes (Fig.
58).
CAUTION: If Camshaft lobes are worn, requiring
camshaft replacement, it is necessary to replace the
tappets also. (Refer to 9 - ENGINE/ENGINE BLOCK/
SOLID LIFTERS - REMOVAL).
CAMSHAFT DIMENSIONS
CAMSHAFT DIMENSIONS
Journal diameter (No.1 and No.7)
Journal diameter (No.2 through
No.6)
Min.
Max.
Diameter of peak of lobe
Intake
Min.
Max
Exhaust
Camshaft Bushing/Bores
Camshaft bores No. 2–6 do not use a bushing.
(1) Inspect the camshaft bushing and bores for
signs of excessive wear.
(2) Measure the camshaft bushing and bores (Fig.
59) with a telescoping bore gauge and micrometer. If
out of specification, (Refer to 9 - ENGINE/ENGINE
BLOCK/CAMSHAFT & BEARINGS (IN BLOCK) -
REMOVAL).
Min. 54.028 mm.
(2.127 in.)
Max. 54.048 mm.
(2.128 in.)
53.962 mm.
(2.1245 in.)
54.013 mm.
(2.1265 in.)
47.175 mm
(1.857 in.)
47.855 mm.
Min. 45.632 mm.
(1.797 in.)
Max. 46.312 mm.
(1.823 in.)
Fig. 58 Measuring
1 - VALVE LOBE
2 - CAMSHAFT JOURNAL
Fig. 59 Measuring Camshaft Bushing and Bores
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