Service Manual

24
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)
0.2579”
(6.550 mm)
Exhaust
0.2577 - 0.2583”
(6.545-6.56 mm)
0.2571”
(6.530 mm)
Valve Guide Inspection
Ream the exhaust valve guide to remove any carbon deposits before
measuring.
Valve Guide ID Specification:
Standard
Service Limit
0.2362 - 0.2604”
(6.0-6.615 mm)
0.2606”
(6.620 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
0.00079 - 0.00197”
(0.02-0.05 mm)
0.0047”
(0.12 mm)
Exhaust
0.00157 - 0.00275”
(0.04-0.070 mm)
0.00669”
(0.17 mm)