Cylinder Head
CYLINDER HEAD SPECIFICATION
| Item | Measurement | Qualification | Standard or New | Service Limit |
|---|---|---|---|---|
| Head | Warpage | -- | 0.05 mm (0.002 in.) | |
| Height | 103.95-104.05 mm (4.093-4.096 in.) | -- | ||
| Camshaft | End play | 0.05-0.20 mm (0.002-0.008 in.) | 0.4 mm (0.02 in.) | |
| Camshaft-to-holder oil clearance | No. 1 journal | 0.030-0.069 mm (0.001-0.003 in.) | 0.15 mm (0.006 in.) | |
| No. 2, 3, 4, 5 journals | 0.060-0.099 mm (0.002-0.004 in.) | 0.15 mm (0.006 in.) | ||
| Total runout | 0.03 mm (0.001 in.) max. | 0.04 mm (0.002 in.) | ||
| Cam lobe height | Intake, primary | 33.416 mm (1.3156 in.) | -- | |
| Intake, mid | 35.032 mm (1.3792 in.) | -- | ||
| Intake, secondary | 33.416 mm (1.3156 in.) | -- | ||
| Exhaust, primary | 32.994 mm (1.2990 in.) | -- | ||
| Exhaust, mid | 35.090 mm (1.3815 in.) | -- | ||
| Exhaust, secondary | 32.994 mm (1.2990 in.) | -- | ||
| Valve | Clearance (cold) | Intake | 0.21-0.25 mm (0.008-0.010 in.) | -- |
| Exhaust | 0.25-0.29 mm (0.010-0.011 in.) | -- | ||
| Stem O.D. | Intake | 5.475-5.485 mm (0.2156-0.2159 in.) | 5.445 mm (0.214 in.) | |
| Exhaust | 5.450-5.460 mm (0.2146-0.2150 in.) | 5.42 mm (0.213 in.) | ||
| Stem-to-guide clearance | Intake | 0.030-0.055 mm (0.0012-0.0022 in.) | 0.08 mm (0.003 in.) | |
| Exhaust | 0.055-0.080 mm (0.0022-0.0031 in.) | 0.11 mm (0.004 in.) | ||
| Valve seat | Width | Intake | 1.25-1.55 mm (0.049-0.061 in.) | 2.00 mm (0.079 in.) |
| Exhaust | 1.25-1.55 mm (0.049-0.061 in.) | 2.00 mm (0.079 in.) | ||
| Stem installed height | Intake | 44.0-44.5 mm (1.73-1.75 in.) | 44.7 mm (1.76 in.) | |
| Exhaust | 44.1-44.6 mm (1.74-1.76 in.) | 44.8 mm (1.76 in.) | ||
| Valve spring | Free length | Intake | 48.16 mm (1.896 in.) | -- |
| Exhaust | 48.16 mm (1.896 in.) | -- | ||
| Valve guide | I.D. | Intake | 5.515-5.530 mm (0.2171-0.2177 in.) | 5.55 mm (0.219 in.) |
| Exhaust | 5.515-5.530 mm (0.2171-0.2177 in.) | 5.55 mm (0.219 in.) | ||
| Installed height | Intake | 15.2-16.2 mm (0.598-0.638 in.) | -- | |
| Exhaust | 15.5-16.5 mm (0.610-0.650 in.) | -- | ||
| Rocker arm | Arm-to-shaft clearance | Intake | 0.025-0.052 mm (0.0010-0.0020 in.) | 0.08 mm (0.003 in.) |
| Exhaust | 0.025-0.052 mm (0.0010-0.0020 in.) | 0.08 mm (0.003 in.) |