148 CYLINDER HEAD AND VALVE TRAIN
Valve Train Components
Engine valve train load carrying requirements
have resulted in different push rod and tappet
configurations. The main differences are noted
by improved geometry designs and materials.
For information on push rod and tappet compatibility
for different engine model year configurations, see
(TSI-06-12-14 Update Valve Train Components –
Push Rod and Tappet Compatibility, page469).
A small geometry adjuster kit provides a replacement
large geometry rocker shaft assembly with small
geometry adjuster screws that can be used with
existing small geometry push rods and tappets. See
(TSI-06-12-21 Update Valve Train Components –
Adjuster Screws, page474).
Installing Rock er Arms
Figure 203 Rocker arm config
uration
1. Clamp bolt assembly
2. Exhaust rocker arm
3. Rocker arm shaft support
4. Lower support washer
5. Machined recessed
6. Intake rocker arm
1. Install push rods.
2. Slide each of the 12 rocker arms onto the rocker
shaft in the order they were removed (rocker arms
should have been marked for this occasion).
NOTE: Ensure that the rocker arm shaft has the big T
stamped facing up (Figure 204).
3. Place a bolt and clamp assembly through each
rocker arm shaft support and align shaft with bolt
hole in cylinder head (Figure 203).
4. Install plastic washer (assembly aid) onto each
intake rocker arm retaining bolt.
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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