Avenger 2008

Variable Camshaft Timing Oil Control Solenoid

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Operation



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

The 2.4L World engine is equipped with Variable Valve Timing (VVT). This system advances and/or retards intake and/or exhaust camshaft timing to improve engine performance, mid-range torque, idle quality, fuel economy, and reduce emissions. The camshaft sprockets are integrated with the VVT assemblies and are serviced as an assembly. VVT assemblies are sometimes referred to as camshaft phasers.

The Variable Valve Timing (VVT) assemblies are actuated with engine oil pressure. The oil flow to the VVT assemblies are controlled by two Oil Control Valves (OCV). There is an OCV and Camshaft Position Sensor (CMP) for each camshaft. The OCV's consist of a Pulse Width Modulated (PWM) solenoid and a spool valve. The PCM actuates the OCV to control oil flow through the spool valve into the VVT assemblies. The VVT assembly consists of a rotor, stator, and sprocket. The stator is connected to the timing chain through the sprocket. The rotor is connected to the camshaft. Oil flow in to the VVT assembly rotates the rotor with respect to the stator, thus rotating the camshaft with respect to the timing chain. Thus, the VVT assemblies change valve timing by changing the relationship between the camshaft and the timing chain. An integral oil pressure activated pin is used to lock base camshaft timing for engine start up. Oil pressure releases the pin and allows the PCM to control cam timing once the engine is running. An infinitely variable valve timing position can be achieved within the limits of the hardware. The CMP monitors the position of the camshaft with respect to the crankshaft and provides feedback to the PCM.

Removal & Installation



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009


NOTE
Camshaft phaser and camshaft sprocket are supplied as an assembly, do not attempt to disassemble.

  1. Remove camshafts.
  2.  
  3. Remove camshaft phaser (2) retaining bolt while holding the camshaft in place with a wrench (1) on the camshaft flats.

    Click image to see an enlarged view

    Fig. Remove camshaft phaser (2) retaining bolt while holding the camshaft in place with a wrench (1) on the camshaft flats

  4.  
  5. Remove phaser (2) assembly from camshaft.
  6.  

To install:


CAUTION
Do not use an impact wrench to tighten camshaft sprocket bolts. Damage to the camshaft-to-sprocket locating dowel pin and camshaft phaser may occur.

  1. Install phaser assembly on camshaft.
    NOTE
    Make sure the dowel is seated in the dowel hole and not in a oil feed hole. The dowel hole is larger than the 4 oil feed holes.

  2.  
  3. Install phaser retaining bolt. Hold camshaft in place with a wrench and tighten bolt to 44 ft. lbs. (59 Nm).
  4.  
  5. Install camshafts.
  6.  

Testing



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

Refer to the appropriate Diagnostic Trouble Code (DTC) for testing and/or diagnosis procedures.

 
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