Valve Stem-To-Guide Clearance Inspection - Honda 2004 Odyssey Service Manual

Cylinder Head

Valve Stem-to-Guide Clearance Inspection

1. Remove the valves (see page 6-46).
2. Slide the valve out of its guide about 10 mm
(0.39 in.), 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 3.
Intake Valve Stem-to-Guide Clearance
Standard (New):
Service Limit:
Exhaust Valve Stem-to-Guide Clearance
Standard (New):
Service Limit:
6-48
0.04 0.09 mm
(0.002 0.004 in.)
0.16 mm (0.006 in.)
0.11 0.16 mm
(0.004 0.006 in.)
0.24 mm (0.009 in.)
3. 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): 0.020 0.045 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.)