REPAIR INSTRUCTIONS, PART 2
Page 281
415
Figure 415 — Set Depth Micrometer
6. Place the valve stem height measurement
gauge (tool No. 85112461) over the valve
spring of the valve to be measured. Make
sure the tool is fully seated on a clean
surface.
Make sure there are no particles of any kind
between the bottom of the valve stem height
measurement gauge and the cylinder head
surface. Particles between the gauge and the
cylinder head surface results in an inaccurate
measurement.
416
Figure 416 — Place Measurement Gauge over Valve
Spring
7. Place the depth micrometer on top of the
valve stem height measurement gauge and
note if there is clearance between the end of
the micrometer spindle and the tip of the
valve stem.
417
Figure 417 — Measuring Valve Stem Height
앫 If there is clearance between the tip of
the valve stem and the tip of the depth
micrometer spindle, valve height is
within specification. Measure the next
valve stem height using the same
method.
앫 If valve stem height is less than
8.10 mm (0.319 inch), as indicated by
the tip of the depth micrometer spindle
contacting the tip of the valve stem, the
valve seat is recessed. Replacement of
the cylinder head is necessary.
8. Position the unit injector harness tie bar to
the cylinder head, install the screws and
tighten according to specification.
9. Install the valve yokes to their original
location.
10. Install the rocker arm shaft assembly and
remove the retainers securing the engine
brake pistons. Adjust valve lash as
necessary (refer to “Valve and Unit Injector
Adjustment” on page 287).
11. Install the cylinder head cover.
12. Install the components that were removed to
gain access to the cylinder head cover.
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