REPAIR INSTRUCTIONS, PART 1
Page 241
The current-production valve guide is 0.042 inch
(1.067 mm) shorter that the previously used valve
guide. It is essential that the correct valve guide
installation tool (J 46549) be used to install the
current valve guide. If the incorrect tool is used,
the valve guide and seal installed height will be
0.060 inch (1.524 mm) too high, and will result in
the seal being contacted by the rotator (if
equipped with tip-end rotators), or by the valve
spring retaining washer (if equipped with bottom
rotators). Contact between the valve seal and
rotator/retainer washer will damage the seal.
5. Using valve guide reamer J 37481, ream the
valve guide as shown in Figure 259 to the
specified dimension.
259
Figure 259 — Reaming Valve Guide
6. Repeat steps 1 through 5 to install the
remaining valve guides.
7. Thoroughly clean all metal debris from the
valve guides and the surrounding area.
8. Install the valves in the cylinder head and
check for binding, looseness and other
conditions that may result in premature
valve or valve guide failure.
Valve Seat Insert Replacement
[213 FB]
INLET AND EXHAUST VALVE SEAT INSERT
DIMENSIONS
Refer to Figure 260.
앫 Valve seat (4) insert face angle (1)
— Inlet: 20° 30′ ± 15′
— Exhaust: 30° 15′ ± 15′
앫 Valve seat insert diameter (2)
— Inlet Standard Production:
1.832–1.831 inches
(46.533–46.507 mm)
— Inlet Oversize Production (0.005):
1.836–1.837 inches
(46.634–46.669 mm)
— Inlet Oversize Service (0.015):
1.846–1.847 inches
(46.888–46.914 mm)
— Inlet Oversize Service (0.031):
1.862–1.863 inches
(47.295–47.320 mm)
— Inlet Oversize Service (0.047):
1.878–1.879 inches
(47.701–47.726 mm)
— Inlet Oversize Service (0.062):
1.893–1.894 inches
(48.082–48.108 mm)
— Exhaust Standard Production:
1.692–1.693 inches
(42.977–43.002 mm)
— Exhaust Oversize Production (0.005):
1.697–1.698 inches
(43.104–43.130 mm)
1. Valve Guide Reamer
J 37481
2. Valve Guide
5-111.bk Page 241 Monday, July 10, 2006 2:26 PM
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