Engine Specifications: Valves
| DESCRIPTION | SPECIFICATIONS | |
|---|---|---|
| Metric | Standard | |
| Face Angle (From Horizontial) | 44.5°-45° | |
| Head Diameter-Intake | 36.37-36.63 mm | 1.4319-14421 in. |
| Head Diameter-Exhaust | 28.87-29.13 mm | 1.1366-1.1469 in. |
| Length-Intake (Overall) | 114.41-114.99 mm | 4.5043-4.5272 in. |
| Length-Exhaust (Overall) | 126.17-126.75 mm | 4.9673-4.9902 in. |
| Stem Diameter-Intake | 6.935-6.953 mm | 0.2730-0.2737 in. |
| Stem Diameter-Exhaust | 6.906-6.924 mm | 0.2719-0.2726 in. |
| Stem-to-Guide Clearance-Intake | 0.022-0.065 mm | 0.0009-0.0026 in. |
| Stem-to-Guide Clearance-Intake (MAX.) Rocking Method | 0.29 mm | 0.0114 in. |
| Stem-to-Guide Clearance-Exhaust | 0.051-0.094 mm | 0.002-0.0037 in. |
| Stem-to-Guide Clearance-Intake (MAX.) Rocking Method | 0.370 mm | 0.0146 in. |
| Valve Lift-Intake (Zero Lash) | 9.00 mm | 0.3543 in. |
| Valve Lift-Exhaust (Zero Lash) | 7.00 mm | 0.2756 in. |
| Valve Margin-Intake | 0.835-1.165 mm | 0.0329-0.0459 in. |
| Valve Margin-Exhaust | 1.44-1.77 mm | 0.0567-0.0697 in. |
| Valve Stem Tip Height-Intake | 42.366-43.655 mm | 1.6680-1.7187 in. |
| Valve Stem Tip Height-Exhaust | 45.205-46.486 mm | 1.780-1.8305 in. |
| >>DESCRIPTION<< | >>SPECIFICATION<< | |
| >>Metric<< | >>Standard<< | |
| Face Angle-Intake | - | 45-45.5° |
| Face Angle-Exhaust | - | 45-45.5° |
| Head Diameter-Intake | 47.87-48.13 mm | 1.88-1.89 in. |
| Head Diameter-Exhaust | 35.37-35.63 mm | 1.39-1.40 in. |
| Valve Lift (Zero Lash) - Intake and Exhaust - 3.8L | 11.0 mm | 0.433 in. |
| Valve Length-Intake | 125.84-126.6 mm | 4.95-4.98 in. |
| Valve Length-Exhaust | 127.20-127.96 | 5.00-5.04 in. |
| Valve Stem to Tip Height (valve tip to spring seat washer) - Intake | 48.1-49.7 mm | 1.89-1.95 in. |
| Valve Stem to Tip Height (valve tip to spring seat washer) - Exhaust | 48.53-50.09 mm | 1.91-1.97 in. |
| Description | Specification | |
|---|---|---|
| Metric | Standard | |
| Face Angle | 45.25° ± 0.25° | |
| Head Diameter - Intake | 39.0 ± 0.100 mm | 1.535 ± 0.004 in. |
| Head Diameter - Exhaust | 30.0 ± 0.100 mm | 1.181 ± 0.004 in. |
| Length-Intake (Overall) | 116.54 ± 0.23 mm | 4.588 ± 0.009 in. |
| Length-Exhaust (Overall) | 115.6 ± 0.23 mm | 4.551 ± 0.009 in. |
| Stem Diameter - Intake | 5.968 ± 0.009 mm | 0.2350 ± 0.0004 in. |
| Stem Diameter - Exhaust | 5.961± 0.009 mm | 0.2347 ± 0.0004 in. |
| Stem-to-Guide Clearance - Intake (New) | 0.023 - 0.061 mm | 0.0009 - 0.0024 in. |
| Stem-to-Guide Clearance - Exhaust (New) | 0.030 - 0.068 mm | 0.0012 - 0.0027 in. |
| Stem-to-Guide Clearance-Intake (Max., Rocking Method) | 0.29 mm | 0.011 in. |
| Stem-to-Guide Clearance - Exhaust (Max., Rocking Method) | 0.37 mm | 0.015 in. |
| Valve Lift-Intake (Zero Lash) | 10.3 mm | 0.406 in. |
| Valve Lift-Exhaust (Zero Lash) | 10.0 mm | 0.394 in. |
| Valve Stem Tip Height* - Intake | 52.4 - 53.5 mm | 2.063 - 2.106 in. |
| Valve Stem Tip Height* - Exhaust | 51.8 - 52.9 mm | 2.039 - 2.083 in. |
| *Valve tip to aluminum spring seat boss | ||