Section 05 ENGINE (4-TEC)
Subsection 07 (CYLINDER HEAD AND VALVES)
Remove valve stem seal no. 28 with special pliers
such as Snap-on YA 8230.
R610motr125A
Inspection
Valve Stem Seal
Inspection of valve stem seals is not needed be-
cause new seals should always be installed when-
ever cylinder head is removed.
Valve
Inspect valve surface, check for abnormal stem
wear and bending. If so, replace by a new one.
Valve Stem and Valve Guide Clearance
Measure valve stem and valve guide in three
places, using a micrometer and a small bore
gauge.
NOTE: Clean valve guide to remove carbon de-
posits before measuring.
Change valve if valve stem is out of specification
or has other damages such as wear or friction sur-
face.
A
R610motr126A
A. Valve stem diameter
VALVE STEM DIAMETER
NEW MINIMUM
Exhaust 5.946 mm (.2341 in)
Intake 5.961 mm (.2347 in)
NEW MAXIMUM
Exhaust 5.960 mm (.2346 in)
Intake 5.975 mm (.2352 in)
SERVICE LIMIT
Exhaust
Intake
5.93 mm (.233 in)
Replace valve guide if it is out of specification or
has other damages such as wear or friction sur-
face. Refer to valve guide replacement below.
smr2004-Complete Line Up 267
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