Valve Clearance

GENERAL SPECIFICATIONS

VALVE TIMING
Intake
Opens (ATDC) 0.0°
Closes (ATDC) 236°
Duration 236°
Exhaust
Opens (BTDC) 233°
Closes (ATDC) 17°
Duration 250°
Valve Overlap 17°

VALVES
Face Angle 45° - 45.5°
Head Diameter
Intake 48.52 - 48.78 mm (1.9103 - 1.9205 inch)
Exhaust 36.87 - 37.13 mm (1.4516 - 1.4618 inch)
Length (Overall)
Intake 113.45 - 114.21 mm (4.4666 - 4.4965 inch)
Exhaust 114.92 - 115.68 mm (4.5244 - 4.5543 inch)
Stem Diameter
Intake 6.931 - 6.957 mm (0.2729 - 0.2739 inch)
Exhaust 6.902 - 6.928 mm (0.2717 - 0.2728 inch)
Stem - to - Guide Clearance
Intake 0.018 - 0.069 mm (0.0008 - 0.0028 inch)
Exhaust 0.047 - 0.098 mm (0.0019 - 0.0039 inch)
Maximum Allowable Stem - to - Guide Clearance (Rocking Method)
Intake 0.069 mm (0.0028 inch)
Exhaust 0.098 mm (0.0039 inch)
Valve Lift (Zero Lash)
Intake 12.00 mm (0.472 inch)
Exhaust 10.90 mm (0.4292 inch)

VALVE SPRING
Free Length (Approximately)
Intake 48.92 mm (1.9260 inch)
Exhaust (without damper) 48.2 mm (1.897 inch)
Spring Force (Valve Closed)
Intake 361.0 - 390.0 N @ 40.12 mm (81.15 - 87.67 lbs. @ 1.5795 inch)
Exhaust (without damper) 356- 394 N @ 39.12 mm (80.031 - 88.574 lbs. @ 1.540 inch)
Spring Force (Valve Open)
Intake 984.0 - 1040.0 N @ 28.12 mm (221.2 - 233.8 lbs. @ 1.107 inch)
Exhaust (without damper) 874 - 956 N @ 27.12 mm (196.483 - 214.917 lbs. @ 1.067 inch)
Number of Coils
Intake 7.30
Exhaust 7.15
Wire Diameter
Intake 4.77 x 3.80 mm (0.1878 - 0.1496 inch)
Exhaust 4.66 x 3.72 mm (0.144 - 0.146 inch)
Installed Height (Spring Seat to Bottom of Retainer)
Nominal
Intake 40.12 mm (1.579 inch)
Exhaust (with damper) 40.12 mm (1.579 inch)