REPAIR INSTRUCTIONS
Page 295
INSPECTION AND REPAIR
Remove the cylinder head valve covers and
check the control valve bores in each J-Tech™
assembly (Figure 320) for a dislodged or broken
snap ring(s). Should a broken or dislodged
control valve snap ring be encountered, it is
recommended that the control valve components
for all six control valves on the engine be
replaced with these new components. After
installing the new-style control valve components,
the letter “C” should be stamped on the Jake
brake housing identification plate, as shown in
Figure 322 to identify that they have the updated
components.
322
Figure 322 — J-Tech™ Housing Identification Plate
Valve Lifter H-Ring Installation
Check
Any valve train failure which results in excessive
valve lash can result in the valve lifter H-ring
being dislodged or partially dislodged. If an
engine has had such a failure, the affected
cylinder must be checked for proper positioning of
the H-ring.
Dislodging of the H-ring from its bore results from
valve lifter inertia forcing the H-ring upward.
When the H-ring at a failure cylinder is higher
than that of an adjacent cylinder, the appropriate
action must be taken depending upon how much
the H-ring has been pushed upward. Measure the
installation depth of the H-ring as follows:
1. Remove the push rod and look down the
push rod hole, observing the top of the lifter
and the top of the H-ring.
2. Place an approximate 15-inch length of
welding rod on the top of the H-ring, at the
outboard side. Refer to Figure 323.
323
Figure 323 — H-Ring Measuring Point
5_106_00.bk Page 295 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs
