30
Valve Stem Inspection
Inspect each valve for face irregularities, bending
or abnormal wear.
Valve Stem Diameter Specification
Standard
Service Limit
Intake
0.2584 -
0.2590”
(6.565-6.58 mm)
0.2535”
(6.44 mm)
Exhaust
0.2577 -
0.2583”
(6.545-6.56 mm)
0.252”
(6.40 mm)
Valve Guide Inspection
Ream the exhaust valve guide to remove any carbon deposits before measuring.
Valve Guide ID Specification:
Standard
Service Limit
0.2598 -
0.2604”
(6.60-6.615 mm)
0.2624”
(6.66 mm)
Valve Stem to Guide Clearance
Subtract each valve stem OD from the corresponding guide ID to
obtain the guide-to-stem clearance.
Standard
Service Limit
Intake
0.00039 -
0.00145”
(0.01-0.037 mm)
0.000393”
(0.10 mm)
Exhaust
0.00197 -
0.00303”
(0.05-0.077 mm)
0.0047”
(0.12 mm)
