CYLINDER HEAD AND VALVE TRAIN 131
2. Position an inspection light at the bottom of the
valve guide bores. Inspect bores for signs of
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
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 gu
ide in sert
1. Arbor press ram
2. Valve guide removal tool
1. Secure the cylinder head on a pre
ss table. Align
the valve guide to be replaced
with the center of
the press ram.
2. Insert the valve guide remov
al tool into the valve
guidefromthetopsideofthe
cylinder head. Press
out the valve guide insert.
CAUTION: To prevent engin
e damage, do not use a
hammer or any other tool t
o remove or install the valve
guide inserts into the cy
linder head.
NOTE: Chilling the valve
guide inserts first may
facilitate installati
on.
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.
To Next Page
Loading...
Need help?
General