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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Mechanical - 3.6L (5 Of 5)) >> Off-Vehicle Repair Instructions (3 Of 3) >> Camshaft Installation - Left Side

Camshaft Installation - Left Side

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Locating Camshaft Sealing Rings In Camshaft Grooves
    GM1306287Courtesy of GENERAL MOTORS CORP.
  1. Ensure that the camshaft sealing rings (1) are in place in the camshaft grooves. Camshaft sealing rings must be in place below the surface of the camshaft journal in order to avoid being pinched between the cylinder head and the camshaft caps.
    2. Fig 2: Identifying Camshaft Ring Placement
    GM1841897Courtesy of GENERAL MOTORS CORP.
  2. Select the proper camshaft for the particular installation location. The ring placement is defined as follows:
    1. The number 4 identification ring for the left intake camshaft is machined off (1) - Third Design, Camshaft Timing Drive System.
    2. The number 5 identification ring for the left exhaust camshaft is machined off (2) - Third Design and Fourth, except High Output, Camshaft Timing Drive System.
    3. The number 3 and 4 identification rings for the left intake camshaft is machined off (3) - Fourth Design, Camshaft Timing Drive System.
    4. The number 1, 2 and 3 identification rings for the left exhaust camshaft is machined off (4) - Fourth Design High Output, Camshaft Timing Drive System.
    3. Fig 3: Lubricating Camshaft Journals & Left Cylinder Head Camshaft Carriers
    GM1306292Courtesy of GENERAL MOTORS CORP.
  3. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the camshaft journals and the left cylinder head camshaft carriers.
    4. Fig 4: View Of Left Camshafts
    GM902909Courtesy of GENERAL MOTORS CORP.
  4. Place the left intake and left exhaust camshafts in position in the left cylinder head.
    5. Fig 5: View Of Camshaft Flats Parallel With Camshaft Cover Rail
    GM1306293Courtesy of GENERAL MOTORS CORP.
  5. Position the camshaft lobes in a neutral position with the flats on the back of the camshafts up and parallel (1) with the left cylinder head camshaft cover rail.
    6. Fig 6: Identifying Markings On Bearing Caps
    GM1306294Courtesy of GENERAL MOTORS CORP.
  6. Observe the markings on the left cylinder head camshaft bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings:
    • The raised feature must always be oriented toward the center of the cylinder head.
    • The I indicates the intake camshaft.
    • The E indicates the exhaust camshaft.
    • The number 2, 4, 6 indicates the cylinder position from the front of the engine.
  7. Apply a liberal amount of lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent to the camshaft bearing caps.
    8. Fig 7: Locating Camshaft Bearing Cap & Bolts
    GM902910Courtesy of GENERAL MOTORS CORP.
  8. Install the camshaft bearing thrust cap in the first journal of the left cylinder head.
  9. Install the remaining bearing caps with their orientation mark toward the center of the cylinder head.
  10. Hand start all the camshaft bearing cap bolts.
    11. Fig 8: Identifying Camshaft Bearing Cap Bolts Tightening Sequence
    GM1306295Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  11. Tighten the camshaft bearing cap bolts in the sequence shown.

    Tighten:  Tighten the camshaft bearing cap bolts in sequence to 10 N.m (89 lb in).

  12. Loosen the center intake camshaft bearing cap bolts 1, 2 and the center exhaust camshaft bearing cap bolts 3, 4.
  13. Retighten the center camshaft bearing cap bolts 1, 2, 3, 4.

    Tighten:  Retighten the camshaft bearing cap bolts to 10 N.m (89 lb in).

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