Valve Inspection; Valve Stem-To-Guide Clearance Inspection - Honda Accord 2008 Manual

07/11/02 09:25:46 61TA0000_060_0091

Valve Inspection

1. Remove the valves (see page 6-90).
2. Measure the valve in these areas.
Intake Valve Dimensions
A Standard (New): 35.85 36.15 mm
B Standard (New): 108.5 109.1 mm
C Standard (New): 5.475 5.485 mm
C Service Limit:
Exhaust Valve Dimensions
A Standard (New): 30.85 31.15 mm
B Standard (New): 108.4 109.0 mm
C Standard (New): 5.450 5.460 mm
C Service Limit:
＊０１
A
ＴＡ０８ＡＥＪＡ１４６８０２０００００ＭＡＡＴ０１
−
(1.411 1.423 in.) −
−
−
(4.272 4.295 in.)
−
(0.2156 0.2159 in.) −
5.445 mm (0.214 in.)
−
−
(1.215 1.226 in.)
−
(4.268 4.291 in.) −
−
(0.2146 0.2150 in.) −
5.42 mm (0.213 in.)
B
C
Valve Stem-to-Guide Clearance
Inspection
1. Remove the valves (see page 6-90).
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): 0.06 0.11 mm −
(0.002 0.004 in.) −
Service Limit: 0.16 mm (0.006 in.)
Exhaust Valve Stem-to-Guide Clearance
Standard (New): 0.11 0.16 mm −
(0.004 0.006 in.) −
Service Limit: 0.22 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): 0.030 0.055 mm
(0.0012 0.0022 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: 0.11 mm (0.004 in.)
ＴＡ０８ＡＥＪＡ１４６８０２６３００１ＭＡＡＴ０２
＊０１
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