Table of Contents
Advertisement
Valve Inspection
Measure the valve in these areas.
Intake Valve Dimensions
A Standard (New):
B Standard (New):
C Standard (New):
C Service Limit:
D Standard (New):
D Service Limit:
Exhaust Valve Dimensions
A Standard (New):
B Standard (New):
C Standard (New):
C Service Limit:
D Standard (New):
D Service Limit:
33.85-34.15 mm
(1.333 - 1 . 3 4 4 in.)
114.85-115.15 m m
(4.522-4.533 in.)
5.485-5.495 mm
(0.2159-0.2163 in.)
5.455 m m (0.2148 in.)
0 . 8 5 - 1 . 1 5 mm
(0.033-0.045 in.)
0.65 mm (0.026 in.)
2 8 . 8 5 - 2 9 . 1 5 mm
(1.136-1.148 in.)
112.85-113.15 mm
(4.443 - 4.455 in.)
5.450-5.460 m m
(0.2146-0.2150 in.)
5.420 mm (0.2134 in.)
1.05-1.35 m m
(0.041-0.053 in.)
0.95 mm (0.037 in.)
30
Valve Stem-to-Guide Clearance
Inspection
1. Slide the valve out of its guide about 10mm, then
measure the guide-to-stem clearance with a dial
indicator while rocking the stem in the direction of
normal thrust (wobble method).
• If the measurement exceeds the service limit,
recheck it using a new valve.
• If the measurement is now within the service
limit reassemble using a new valve.
• If the measurement with a new valve still
exceeds the service limit go to step 2.
Intake Valve Stem-to-Guide Clearance:
Standard (New): 0 . 0 4 - 0 . 0 9 mm
(0.002-0.004 in.)
Service Limit:
0.16 m m (0.006 in.)
Exhaust Valve Stem-to-Guide Clearance:
Standard (New): 0 . 1 1 - 0 . 1 6 m m
(0.004-0.006 in.)
Service Limit:
0.24 mm (0.009 in.)
2. Subtract the O.D. of the valve stem, measured with
a micrometer, from the I.D. of the valve guide,
measured with an inside micrometer or ball gauge.
Take the measurements in three places along the
valve stem and three places inside the valve guide.
The difference between the largest guide
measurement and the smallest stem measurement
should not exceed the service limit.
Intake Valve Stem-to-Guide Clearance:
Standard (New): 0 . 0 2 0 - 0 . 0 4 5 mm
(0.0008-0.0018 in.)
Service Limit:
0.08 mm (0.003 in.)
Exhaust Valve Stem-to-Guide Clearance:
Standard (New): 0.055-0.080 mm
(0.0022-0.0031 in.)
Service Limit:
0.12 mm (0.005 in.)
6-43
Advertisement
Table of Contents
Troubleshooting
