REPAIR INSTRUCTIONS
Page 299
5. Permanently mark the flywheel at this
location for cylinders 1 and 6. To gain
access, rotate the engine slightly so that the
area to be marked is either to the right or left
side of the timing pointer. Place a chisel
mark directly in line with the clutch mounting
bolt/bolt hole. Then, stamp or electric-etch
the cylinder numbers on either side of the
chisel mark.
6. Rotate the engine to the remaining locations
and make sure to count the clutch mounting
bolt/bolt holes to verify the locations of the
temporary markings. Once verified,
permanently mark each location as
described.
NON-TYPICAL FLYWHEELS
If the engine is equipped with a non-typical
flywheel, the TC markings will be halfway
between two clutch mounting bolts. If this type of
flywheel has no valve adjustment markings, it
should be replaced.
VALVE YOKE ADJUSTMENT
Beginning March 2, 2000 (engine serial
No. 0D0120), pinless valve yokes were
implemented into production on all E-Tech™
engines. The pinless yokes are used for the inlet
valves only. The cylinder heads no longer have
yoke guide pins at the inlet valve locations.
The pinless yoke is self-leveling in operation and
does not have a leveling adjustment screw. Inlet
valve adjustments are performed in the normal
manner with the rocker arm adjusting screw. For
the exhaust valves, it is still necessary to adjust
the valve yoke first, then the rocker arm lash.
Make sure that adjusting screws are retracted
upward in the rocker arms. If they extend too far
below the rocker arm, the push rods can be bent
when tightening the rocker arm assembly
brackets.
Verify that the slave piston adjusting screws are
fully retracted and that all the spherical jam nuts
are turned down snug against the rocker arms
before rotating the engine crankshaft for valve
lash adjustment. Rotating the engine crankshaft
with the spherical jam nuts loose, or the slave
piston adjusting screws not fully retracted, could
damage the brake master pistons.
Refer to Figure 326 and Figure 327.
1. Using engine barring socket J 38587-A,
manually rotate engine in normal rotation
direction until pointer in flywheel housing
aligns with the valves 1 and 6 mark on the
flywheel and the No. 1 piston is on the
compression stroke.
Valve lash must be set using the valve
adjustment marks on the engine flywheel, which
are at 30 degrees ATC. This ensures that the
lifter is on the camshaft base circle and not on the
brake ramp portion of the lobe.
326
Figure 326 — Engine Crankshaft Rotation
1. Barring Socket
J 38587-A
2. Flywheel Housing
3. Flywheel
5_106_00.bk Page 299 Friday, August 4, 2000 11:17 AM
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