Figure 11B-52. Testing Exhaust Valve
Spring
tain the valve-to-guide clearance. If the
clearance exceeds 0.005", replace the
F i g u r e 11B-53. Cleaning Valve Guide
valve guides.
NOTE
R e p l a c e Exhaust Valve Guide
Do not use the valve guides as a
means of turning the cylinder head
Remove an exhaust valve guide as
over or in handling the cylinder
follows:
head.
1. Support the cylinder, bottom side up,
on 3" thick wood blocks.
S e r v i c e r e p l a c e m e n t v a l v e g u i d e s are
completely finish reamed during manufac-
2. Drive the valve guide out of the cyl-
ture and, therefore, do not require
inder head with valve guide remover J
reaming after installation.
6569 shown in Figure 11B-54 on page
11B-37.
R e m o v e Exhaust Valve Bridge Guide
Place the cylinder head right side up on
the bed of an arbor press and install the
Remove the press-fit valve bridge guide
valve
guide
as
follows
(see
with
tool
J
7091-01
as
follows
(see
1. Insert the internally threaded end of
1. File or grind two diametrically oppo-
the valve guide in valve guide installa-
s i t e notches 1/16" deep in the side of the
tion tool J 21520. Be sure to use the
guide, approximately 1-1/4" to 1-1/2"
correct tool to avoid damage to the valve
from the upper end.
guide, and to locate the valve guide to
the proper dimension.
2 . Place spacer J 7091-3 over the guide.
Then slide guide remover J 7091-5 over
2. Position the valve guide squarely in
the guide and align the set screws with
the bore in the cylinder head and press
the notches in the guide. Tighten the
the installing tool gently to start the
s e t screws to hold the tool securely.
guide
in
place
(see
Figure
11B-56
on
page 11B-37). Then press the guide in
3. Place spacer J 7091-4 over the guide
until the tool contacts the cylinder head.
remover. Thread the nut on the guide
11B-36
