Camshaft and Timing Gear Train
02
050
3
RG,RG34710,189 –19–13AUG99–2/3
IMPORTANT: DO NOT insert timing pin full depth into
cylinder block crankshaft timing hole
when rotating engine flywheel until
double slot on camshaft timing lobe is
at approximately 11 o’clock (viewed
from rear of engine) to avoid crankshaft
counterweight bending timing pin.
5. Slightly move engine flywheel back and forth with
turning tool until a second JDG971 Timing Pin (C) can
be installed in slot in crankshaft. This ensures that
camshaft and crankshaft are in sync (properly timed).
If timing pin does not enter crankshaft timing slot,
crankshaft MUST BE timed to camshaft as detailed
next in this group.
RG,RG34710,189 –19–13AUG99–3/3
RG8251C –UN–06DEC97
Camshaft Gear Retainer Cap Screws
RG8227D –UN–05DEC97
JDG971 Timing Pin in Crankshaft
A—Camshaft Gear Retainer Cap Screws
B—JDG820 Flywheel Turning Tool
C—JDG971 Timing Pin
Adjust Camshaft-to-Crankshaft Timing
1. Leave JDG971 Timing Pin in camshaft timing slot and
remove camshaft gear access cover (shown removed)
from timing gear cover. (See REMOVE TIMING GEAR
COVER in Group 040.)
2. Loosen camshaft gear retainer cap screws (A).
3. Rotate crankshaft with JDG820 Flywheel Turning Tool
(B) and install second JDG971 Timing Pin (C) in
crankshaft timing slot.
4. Adjust gear train backlash and complete final
assembly. (See ADJUST FRONT TIMING GEAR
BACKLASH, next in this group.)
5. Tighten camshaft gear retainer plate to following
torque:
Specification
Camshaft Gear Retainer
Plate-to-Camshaft—Initial Torque 100 N•m (74 lb-ft).................................
Second Torque 150 N•m (110 lb-ft)............................................................
Final Retorque 150 N•m (110 lb-ft).............................................................
CTM100 (06APR04)
02-050-3
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=243
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