Replacing Valve Guides - Navistar INTERNATIONAL DT 466 Service Manual

2. Position an inspection light at the bottom of the
valve guide bores.
burning or cracking. Replace any valve guides
that are damaged.
Figure 163 Measuring valve guide with ball
gauge
Figure 164 Measuring ball gauge with an
outside micrometer
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
CYLINDER HEAD AND VALVE TRAIN
Inspect bores for signs of
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
3. Use a ball gauge and an outside micrometer to
measure the inside diameter of each valve guide.
If inside diameter of valve guide exceeds
specifications, replace valve guide.
4. Measure the valve guides within 0.64 mm
(0.025 in) of each end and 90 degrees from
the crankshaft center line. Record the readings
in order to determine the valve-to-guide running
clearance later.

Replacing Valve Guides

Figure 165 Pressing out valve guide insert
1. Arbor press ram
2. Valve guide removal tool
1. Secure the cylinder head on a press table. Align
the valve guide to be replaced with the center of
the press ram.
2. Insert the valve guide removal tool into the valve
guide from the top side of the cylinder head. Press
out the valve guide insert.
CAUTION: To prevent engine damage, do not use a
hammer or any other tool to remove or install the valve
guide inserts into the cylinder head.
NOTE: Chilling the valve guide inserts first may
facilitate installation.
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