Buell XB 2010, Service Manual

Page: 311 / 714

REPLACING VALVE GUIDES
TOOL NAME PART NUMBER
VALVE GUIDE REAMER B-45523
VALVE GUIDE REMOVER/INSTALLER B-45524-A
VALVE GUIDE HONE B-45525
VALVE GUIDE CLEANING BRUSH HD-34751
Valve guide replacement, if necessary, must be done before
valve seat is ground. It is the valve stem hole in valve guide
that determines seat grinding location. If valve stems and/or
guides are worn beyond limits, install new parts. For valve
stem to valve guide clearances, refer to
Table 3-18 .
1. To remove shoulderless guides, press or tap guides toward
combustion chamber using VALVE GUIDE
REMOVER/INSTALLER (Part No. B-45524-A).
2. Clean and measure valve guide bore in head.
3. Measure outer diameter of a new standard valve guide.
The guide diameter should be 0.0020-0.0033 in. (0.0508-
0.0838 mm) larger than bore in head. If clearance is not
within specification, select oversize valve guide and
machine valve guide O.D. as needed.
4. See Figure 3-56 . Install shoulderless guides using VALVE
GUIDE REMOVER/INSTALLER (Part No. B-45524-A).
Press or drive guide until the tool touches the machined
surface surrounding the guide. At this point, the correct
guide height has been reached.
5. Ream guides to final size or within 0.0010 in. (0.0254 mm)
of final size using VALVE GUIDE REAMER (Part No. B-
45523). Use REAMER LUBRICANT (Part No. HD-39964)
or liberal amounts of suitable cutting oil to prevent reamer
chatter.
NOTE
The hone is not intended to remove material.
6. Apply the proper surface finish to the valve guide bores
using the VALVE GUIDE HONE (Part No. B-45525).
Lubricate hone with honing oil. Driving hone with an elec-
tric drill, work for a crosshatch pattern with an angle of
approximately 60°.
7. See Figure 3-57 .Thoroughly clean valve guide bores using
VALVE GUIDE CLEANING BRUSH (Part No. HD-34751)
and hot soapy water.
Table 3-18.Valve Stem Clearance and Service Wear Limits
SERVICE WEAR
LIMIT
CLEARANCE VALVE
MM IN. MM IN.
0.1 0.0038 0.025-
0.076
0.001-
0.003
Exhaust
0.1 0.0038 0.025-
0.076
0.001-
0.003
Intake
2
1
sm00145
1. Valve guide remover/installer
2. Cylinder head stand
Figure 3-56. Installing Shoulderless Valve Guide
2
1
sm00146
1. Valve guide brush (Part No. HD-34751)
2. Cylinder head holding fixture (Part No. HD-39786)
Figure 3-57. Cleaning Valve Guides
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2010 XB Service: Engine 3-43