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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 2.4L) >> Repair Instructions - On Vehicle >> Camshaft Position Exhaust Actuator Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Exhaust Camshaft Sprocket
    GM1578298Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Ensure that the alignment mark made previously on the intake camshaft actuator is still aligned properly with the mark on the timing chain.
    • The exhaust camshaft may need to be rotated clockwise to fully set the camshaft actuator.
  1. Install the timing chain onto the exhaust camshaft actuator.
  2. Align the exhaust camshaft actuator alignment mark made previously with the timing chain mark and install the actuator onto the camshaft.
  3. Install a NEW exhaust camshaft actuator bolt (2) until snug.
    4. Fig 2: Identifying Timing Chain & Chain Retention Tool
    GM2134127Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure that the alignment mark previously on the exhaust camshaft actuator is still aligned properly with the timing chain. If the mark made previously on the intake camshaft actuator is not aligned properly, refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement .

  4. Remove the EN-48749  retention tool (1) from the exhaust side of the timing chain.
    5. NOTE:

    Failure to reset the tensioner will allow the tensioner to over extend. limiting the timing chain life.

  5. Reset and install the timing chain tensioner. Refer to Timing Chain Tensioner Replacement .
    6. Fig 3: View of Camshaft Actuator Retainer
    GM2134128Courtesy of GENERAL MOTORS COMPANY
  6. Install the EN-48953  locking tool (1).
  7. Install the camshaft actuator retainer bolts and tighten 10 N.m (89 lb in).
  8. Tighten the NEW camshaft actuator bolt to 30 N.m (22 lb ft) plus an additional 100 degrees using the EN-45059  meter.
    9. NOTE:

    You must have the EN-48953  locking tool installed to perform this procedure.

  9. To release the tensioner apply a counterclockwise rotational torque to the crankshaft balancer bolt of 45 N.m (33 lb ft).
    10. Fig 4: Loosening/Tightening Camshaft Actuator Retainer Bolts
    GM2066456Courtesy of GENERAL MOTORS COMPANY
  10. Remove the camshaft actuator retainer EN-48953  locking tool (1).
    11. Fig 5: Upper Timing Chain Guide
    GM2660876Courtesy of GENERAL MOTORS COMPANY
  11. Install the upper timing chain guide (2) and bolts (1) and tighten to 10 N.m (89 lb in).
  12. Install the camshaft cover. Refer to Camshaft Cover Replacement (LUK)  or Camshaft Cover Replacement (LEA) .
  13. Install the spark plugs. Refer to Spark Plug Replacement .
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