Description And Operation: Camshaft
The Pentastar engine uses a Dual Over Head Camshaft (DOHC) configuration designed to work with the two-step Variable Valve Lift (VVL) system.
- The camshafts are a nodular cast iron design.
- Each camshaft has a pressed on magnetic timing wheel that is magnetically encoded.
- The two Camshaft Position (CMP) sensors are located between the timing wheels.
- Attached to the rear of the right exhaust camshaft is a centrifuge which is part of the crankcase ventilation system.
Intake Camshafts
- Intake valve lift centerlines: 146° (high lift), 104° (low lift).
- Tri-lobe design for two-step switchable roller finger follower.
- Gun drilled for weight reduction.
Exhaust Camshafts
- Valve lift centerline: 123°.
- Refined double-polish surface finish on journals
- Gun drilled for weight reduction.
The centrifuge is used to separate oil droplets from the crankcase gases before they enter the PCV valve. Four bearing journals are machined into the camshaft. Camshaft end play is controlled by two thrust walls that border the nose piece journal.