| Event | Crank Angle (Degrees) |
|---------------|----------------------|
| Injection Start | -21° BTDC |
| Injection End | +2° ATDC |
| Intake Valve Open | -10° ATDC |
| Intake Valve Close | +20° ABDC |
| Exhaust Valve Open | -35° BBDC |
| Exhaust Valve Close | +15° ATDC |
Note: This diagram represents the approximate valve timing and injection timing events of the Isuzu 4HK-1 engine. Actual timing values may vary slightly based on specific engine specifications and operating conditions.
