Valve Guide Replacement - Honda BF135A Manual

8. VALVE GUIDE REPLACEMENT

1) Chill the replacement valve guides in the freezer section of
a refrigerator for about an hour.
2) Drive the valve guide out of the combustion chamber side
using a special tools.
TOOL:
Valve guide driver, 5.5 mm
When driving the valve guides out, be careful not to
damage head.
3) Remove the new valve guides from the refrigerator one at
a time as needed.
4) Install the new valve guides from the valve spring side of
the cylinder head. Drive each valve guide as shown.
Valve guide
projection height
5) After installation, inspect the valve guide for damage.
Replace any damaged valve guide.
• VALVE GUIDE REAMING
For best results, be sure the cylinder head is at room
temperature before reaming valve guides.
1) Coat the reamer and valve guide with cutting oil.
2) Rotate the reamer clockwise through the valve guide for
the full length of the reamer.
3) Continue to rotate the reamer clockwise while removing it
from the valve guide.
TOOL:
Valve guide reamer, 5.525 mm
10-26
07742-0010100
CAUTION
15.2 – 16.2 mm
IN
(0.60 – 0.64 in)
15.5 – 16.5 mm
EX
(0.61 – 0.65 in)
07HAH-PJ70100
[1]
VALVE GUIDE
DRIVER, 5.5 mm
07742-0010100
[1]
VALVE GUIDE
[2] PROJECTION
HEIGHT
[1]
VALVE GUIDE
REAMER, 5.525 mm
07HAH-PJ70100