Variable Camshaft Timing
| Item | Description |
|---|---|
| 1 | Variable Camshaft Timing (VCT) solenoid - Intake |
| 2 | Center bolt - VCT actuator - Intake |
| 3 | VCT actuator - Intake |
| 4 | Secondary timing chain |
| 5 | VCT actuator - Exhaust |
| 6 | Center bolt - VCT actuator - Exhaust |
| 7 | VCT solenoid - Exhaust |
The Powertrain Control Module (PCM) controls the Variable Camshaft Timing (VCT) system using information from the following components:
- The 2 Camshaft Position (CMP) sensors
- The Crankshaft Position (CKP) sensor.
The timing of the intake and exhaust camshafts can be adjusted independently by an oil pressure controlled torsional assist VCT system. The VCT solenoid is controlled electrically and determines the position of the VCT actuator, which has a direct interface with the camshafts.
Each VCT actuator is located on the camshaft at the rear of the engine and is secured with a center bolt. Each center bolt contains an oil control valve.