Cylinder Head and Valves
02
020
4
RG,RG34710,63
–19–16OCT00–1/6
Check and Adjust Valve Assembly
Clearances and Injector Preload
RG8228A
–UN–05DEC97
JDG971 Timing Pin in Camshaft
RG8227D
–UN–05DEC97
JDG971 Timing Pin in Crankshaft
RG11165
–UN–30OCT00
Camshaft Timing Slot
A—JDG971 Timing Pin
B—JDG820 Flywheel Turning Tool
C—JDG971 Timing Pin
D—Single Timing Slot
E—Double Timing Slot
Rocker arm assembly adjustments consist of intake and
exhaust valve clearance (lash) and electronic unit injector
preload adjustment.
CAUTION: To prevent accidental starting of
engine while performing rocker arm adjustment,
ALWAYS disconnect NEGATIVE (–) battery
terminal.
IMPORTANT: All rocker arm assembly adjustments
MUST BE performed with engine COLD.
1. Remove rocker arm cover. (See REMOVE AND
INSTALL ROCKER ARM COVER earlier in this group.)
2. Remove plug from cylinder block and install JDG820
Flywheel Turning Tool (B).
3. Remove threaded plug from timing hole below oil
cooler and filter housing assembly.
IMPORTANT: Timing pin MUST BE installed in slot of
camshaft first, then install second
timing pin in crankshaft slot by
carefully rocking flywheel back and
forth.
4. Rotate engine flywheel in running direction
(counterclockwise as viewed from rear) until JDG971
Timing Pin (A) engages single timing slot (D) in
camshaft. The proper timing slot can be found by
viewing camshaft timing lobe through camshaft timing
pin bore while rotating engine. The double timing slot
(E) will be at approximately 11 o’clock (viewed from
rear of engine) when pin is installed in slot (D).This
ensures that engine is locked at TDC of No. 1
cylinder’s compression stroke. Intake and exhaust
rocker arms on No. 1 cylinder should be loose.
CTM100 (06APR04)
02-020-4
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=76
Continued on next page
Summary of Contents for 6105ADW
Page 16: ...Contents 01 CTM100 06APR04 01 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Page 50: ...Contents 02 CTM100 06APR04 02 4 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 4 ...
Page 334: ...Contents 03 CTM100 06APR04 03 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Page 350: ...Contents 04 CTM100 06APR04 04 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
Page 376: ...Contents 05 CTM100 06APR04 05 2 POWERTECH 10 5 L 12 5 L Diesel Engines 040604 PN 2 ...
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