Camshaft and Timing Gear Train
02
050
20
RG,RG34710,194 –19–25OCT00–1/1
Measure Camshaft Lobe Lift Height
RG8386 –UN–21MAY98
Measuring Camshaft Lobe Base Circle
RG8387 –UN–21MAY98
Measuring Camshaft Lobe Lift
Measure each camshaft lobe at its highest point (lobe lift)
and at its narrowest point (base circle). Subtract narrowest
from highest height to find cam lobe lift.
If camshaft lobe lift is not within specification on any one
lobe, replace camshaft.
Camshaft Lobe—Specification
Intake Lobe—Lift 8.73—8.99 mm (0.343—0.353 in.).................................
Exhaust Lobe—Lift 7.93—8.19 mm (0.312—0.322 in.)..............................
EUI Lobe 10.5 L Engines and
12.5 L Engines ( —29999)—Lift 14.16—14.42 mm (0.557—0.567
in.)
...........
EUI Lobe 12.5 L Engine S.N.
(30000— )—Lift 16.09—16.35 mm (0.633—0.643
in.)
.....................................
RG,RG34710,195 –19–30SEP97–1/1
Inspect Camshaft Position Sensor Lobe
RG8385A –UN–09DEC97
Inspecting Camshaft Sensor and Timing Slots
A—Lobe Slots
Visually inspect camshaft position sensor lobe slots (A) for
damage or chips that may emit a false reading.
Replace camshaft as necessary.
CTM100 (06APR04)
02-050-20
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=260
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