Cylinder Head and Valves
02
020
33
RG,RG34710,84 –19–01NOV00–1/1
Measure Valve Guide ID
RG8308 –UN–21MAY98
Measuring Valve Guide ID
1. Measure valve guides ID using a telescopic gauge.
2. Record measurements and compare readings with
valve stem OD to determine stem-to-guide clearance.
Specification
Valve Guide—ID 9.045 ± 0.013 mm (0.3583 ±
0.0005 in.)
...........................................
Valve Stem—OD 8.999 ± 0.013 mm (0.3543 ±
0.0005 in.)
..........................................
Valve Stem-to-Guide—Clearance 0.077—0.129 mm
(0.0030—0.0050 in.)
.................................
Replacement valve guides are available if valve guide ID
is not within specification for specified guide-to-stem
clearance (See REPLACE VALVE GUIDES, later in this
group).
RG,RG34710,85 –19–16OCT00–1/2
Replace Valve Guides
RG8823 –UN–11DEC97
Removing Valve Guide with JDG164A
A—JDG164A Valve Seat Pilot Driver
Remove Valve Guides
1. Position cylinder head with combustion face facing up.
2. Drive valve guides from combustion face side of
cylinder head using JDG164A Driver (A) and a press.
3. Inspect valve guide bore for cracking or excessive
metal transfer. Thoroughly clean valve guide bore.
4. Measure valve guide bore in cylinder head. Replace
cylinder head if valve guide bore is not within
specification.
Specification
Valve Guide Bore in Head—ID 14.94 ± 0.02 mm (0.5882 ±
0.0008 in.)
......................
CTM100 (06APR04)
02-020-33
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=105
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