Valve Stem Outside Diameter And Valve Guide Inside Diameter - Measure; Valve Guide - Replace - Mitsubishi S6R Series Service Manual

Chapter 6 INSPECTION AND REPAIR OF BASIC ENGINE

1.3 Valve Stem Outside Diameter and Valve Guide Inside Diameter - Measure

Measure the outside diameter of valve stem and the inside
diameter of valve guide at the top and bottom sliding ends in
right-angle directions as shown, as the sliding surface tends
to wear at the top and bottom ends. If the measurement
exceeds the limit, replace the valve guide or valve with a
new one.
Note: Lap the valve and valve seat whenever new valve is in-
stalled.
Nominal
Item
value
Valve stem ø10 mm
outside diameter [0.39 in.]
Valve guide ø10 mm
inside diameter [0.39 in.]

1.4 Valve Guide - Replace

Be sure to use the guide and seal installer, and press-
in the valve guide to the specified height.
(1) Remove the valve guide with valve guide remover.
(2) With guide and seal installer, press-in the new valve
guide slowly.
6-4
Standard value Limit value
9.940 to 9.960 mm 9.910 mm
[0.0010 to 0.0044 in.] [0.3902 in.]
10.000 to 10.015 mm 10.060 mm
[0.3937 to 0.3943 in.] [0.3961 in.]
Valve Stem Outside Diameter - Measure
Valve Guide Inside Diameter - Measure
Valve guide remover
P/N:33591-04300
Valve Guide - Remove
Valve Guide - Press-in
Measurement
direction
Measurement
point
Measurement
direction
Measurement
point
Guide and seal installer
P/N:37191-11500
Valve guide
Cylinder head