Valve Guide Replacement - Honda BF40D Manual

5. VALVE GUIDE REPLACEMENT

1) Chill the replacement valve guides in the freezer section of
1
a refrigerator for about an hour.
2
2) Drive the valve guide out from the combustion chamber
side using a special tool.
3
TOOL:
4 Valve guide driver, 5.5 mm
5
6
7
8
9
10
11
12
3) Remove the new valve guides from the refrigerator one at
13
a time as needed.
14
4) Install the new valve guides from the valve spring side of
the cylinder head.
15
Drive each valve guide to the specified height, measured
from the top of the valve guide to the cylinder casting as
16 shown.
17
Valve guide
protruding height
18
19
5) After installation, inspect the valve guide for damage.
Replace any damaged valve guide.
20
9-19
07742-0010100
14.25 - 14.75 mm
IN
(0.561 - 0.581 in)
12.75 - 13.25 mm
EX
(0.502 - 0.522 in)
124
[1]
VALVE GUIDE DRIVER,
5.5 mm
07742-0010100
[1]
VALVE GUIDE
[2]
PROTRUDING
HEIGHT