Replacing Valve Guides - Buell XB 2008 Series Service Manual

REPLACING VALVE GUIDES

PART NUMBER
B-45523 VALVE GUIDE REAMER
B-45524-A VALVE GUIDE REMOVER/INSTALLER
B-45525 VALVE GUIDE HONE
HD-34751 VALVE GUIDE CLEANING BRUSH
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, see
1. To remove shoulderless guides, press or tap guides toward
combustion chamber
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 3-57. 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 3-58.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
VALVE CLEARANCE
IN.
Exhaust 0.001-
0.003
Intake 0.001-
0.003
3-42 2008 XB Service: Engine
TOOL NAME
Table 3-18.
using VALVE GUIDE
SERVICE WEAR
LIMIT
MM IN. MM
0.025- 0.0038 0.1
0.076
0.025- 0.0038 0.1
0.076
sm00145
2
1. Valve guide remover/installer
2. Cylinder head stand
Figure 3-57. Installing Shoulderless Valve Guide
sm00146
1
2
1. Valve guide brush (Part No. HD-34751)
2. Cylinder head holding fixture (Part No. HD-39786)
Figure 3-58. Cleaning Valve Guides
1