11 12 Cylinder Head with Valve Seat Cover N57O1/N57T1
CYLINDER HEAD WITH VALVE SEAT COVER SPECIFICATION
| Valve seat angle | ° | 45 |
| Correction angle: outer Intake and exhaust |
° | 15 |
| Correction angle: inner Intake |
° | 36 |
| Correction angle: inner Exhaust | ° | 60 |
| Valve seat width: Intake | mm | 12 ±0.25 |
| Valve seat width: Exhaust | mm | 14 ±0.25 |
| Ø Valve seat | ||
| Valve seat surface: Outside dia. inlet | mm | 25.9+0.1 |
| Valve seat surface: Outside dia. exhaust | mm | 23.2+0.1 |
| Cylinder head height: Original dimension | mm | No machining possible |
| Machining limit, valve-inset clearance | mm | 0.8 ± 0.1 |
| Valve guides are not available as replacement parts. | ||
| Inner diameter of installed valve guide | ||
| Original | mm | 5 0+0.15 |
| Tilt clearance, maximum (wear between valve and valve guide) | mm | can't be measured |