Valve, Intake/Exhaust

VALVE

INTAKE STEM OUTER DIAMETER
Standard 5.958-5.977 mm (90.2347-0.2363 in.)
Service Limit 5.945 mm (0.2342 in. min.)

EXHAUST STEM OUTER DIAMETER
Standard 5.944-5.963 mm (0.2342-0.2349 in.)
Service Limit 5.93 mm (0.2336 in. min.)

VALVE GUIDE INNER DIAMETER
Standard 6-6.02 mm (0.2364-0.2372 in.)
Service Limit 6.06 mm (0.239 in. max)

VALVE GUIDE OUTER DIAMETER
Standard 11.393-11.407 mm (0.448-0.449 in.)

INTAKE STEM TO GUIDE CLEARANCE
Standard 0.023-0.062 mm (0.001-0.0025 in.)
Service Limit 0.113 mm (0.004 in. max)

EXHAUST STEM TO GUIDE CLEARANCE
Standard 0.037-0.076 mm (0.0015-0.003 in.)
Service Limit 0.131 mm (0.005 in. max)

INTAKE TOTAL LENGTH
Standard 96.28-96.74 mm (3.7934-3.8116 in.)
Service Limit 96.2-96.74 mm (3.787-3.812 in.)

EXHAUST TOTAL LENGTH
Standard 95.58-96.04 mm (3.7659-3.784 in.)
Service Limit 95.5-96.04 mm (3.76-3.784 in.)

INTAKE HEAD DIAMETER
Standard 32.16-32.46 mm (1.2661-1.278 in.)

EXHAUST HEAD DIAMETER
Standard 27.3-27.6 mm (1.0748-1.0866 in.)

INTAKE MARGIN WIDTH
Standard 0.75 mm (0.03 in. min.)

EXHAUST MARGIN WIDTH
Standard 0.75 mm (0.03 in. min.)

FACE ANGLE (INTAKE AND EXHAUST)
Standard 45-45.5°
Service Limit 45-45.5°

VALVE TIP PROTRUSION
Standard 39.31-39.98 mm (1.548-1.567 in.)
Service Limit 39.31-40.28 mm (1.548-1.586 in. max)

VALVE SEAT

INTAKE WIDTH
Standard 0.79-1.23 mm (0.0394-0.0512 in.)
Service Limit 1.66 mm (0.0653 in. max)

EXHAUST WIDTH
Standard 1.05-1.49 mm (0.0512-0.063 in.)
Service Limit 1.92 mm (0.0756 in. max)

ANGLE (INTAKE AND EXHAUST)
Standard 44.5-45°
Service Limit 44.5-45°

VALVE SEAT OUTSIDE DIAMETER

INTAKE
Standard 33.49-33.51 mm (1.3185-1.3193 in.)

EXHAUST
Standard 28.49-28.5 mm (1.121-1.122 in.)

VALVE SPRING

VALVE SPRING
Free Length (Intake and Exhaust)
Standard 40.1 mm (1.56 in.)

SQUARENESS
Standard 2 mm (0.08 in. max)
Service Limit 2.5 mm (0.1 in. max)

FORCE/TENSION AT 21.5 mm (0.847 in.)
Standard 440-486 N (99-109 lbs.)
Service Limit 420 N (94 lbs. min.)

FORCE/TENSION AT 31 mm (1.221 in.)
Standard 186-214 N (42-48 lbs.)
Service Limit 180 N (40 lbs. min.)