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Home >> Buick >> 2015 >> Verano Leather >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 2.0L (LHU)) >> Repair Instructions - Off Vehicle >> Intake and Exhaust Camshaft, Bearing Cap, and Lash Adjuster Installation (LDK, LHU) >> Intake Camshaft and Components Installation

Intake Camshaft and Components Installation

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Hydraulic Lash Adjusters
    GM2074539Courtesy of GENERAL MOTORS COMPANY
  1. Install the hydraulic lash adjusters (1) into their bores in the cylinder head.
  2. Lubricate the hydraulic lash adjusters, refer to Adhesives, Fluids, Lubricants, and Sealers .
    3. Fig 2: Lubricating Valve Tips
    GM2146377Courtesy of GENERAL MOTORS COMPANY
  3. Lubricate the valve tips (1).
    4. Fig 3: Intake Camshaft Roller Finger Followers
    GM2074537Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Used roller followers must be returned to the original position on the camshaft. If the camshaft is being replaced, the roller followers actuated by the camshaft must also be replaced.

  4. Position the roller followers (1) on the tip of the valve stem and on the lash adjuster. Lubricate the roller followers, refer to Adhesives, Fluids, Lubricants, and Sealers .
    5. Fig 4: Intake Camshaft
    GM2074575Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The engine is timed top dead center exhaust stroke.

  5. When installing the camshafts, ensure the exhaust camshaft notch is in the 7 o'clock position. The number 1 piston should be at top dead center (TDC), crankshaft key at 12 o'clock.
  6. Set the intake camshaft (1) on top of the roller followers in the camshaft bearing journals. Lubricate the camshaft, refer to Adhesives, Fluids, Lubricants, and Sealers .
    7. Fig 5: Oil Seals
    GM1846063Courtesy of GENERAL MOTORS COMPANY
  7. Rotate the oil seal in the groove of the number one camshaft journal so the split line (1) is at approximately the 12:00 position before installing the camshaft caps.
    8. Fig 6: Positioning Camshaft Notch
    GM2141368Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The number 1 cylinder must be at top dead center (TDC), crankshaft keyway at the 12 o'clock position.

  8. Install the intake camshaft with the notch on the front at approximately the 5 o'clock position (1).
    9. Fig 7: Camshaft Bearing Caps And Bolts
    GM2141369Courtesy of GENERAL MOTORS COMPANY
  9. Install the camshaft caps (1) and hand start the camshaft cap bolts.
  10. Tighten the camshaft cap bolts in increments of 3 turns until they are seated. Tighten the camshaft caps to 10 N.m (89 lb in).
    11. Fig 8: Ensuring Bearing Rear Cap And Cylinder Head Alignment
    GM2141370Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    It is critical during installation to ensure the bearing rear cap and cylinder head alignment is correct and the mating surfaces are flush.

    • Ensure that all sealing material has been removed from the components, and the sealing surfaces are clean and free of contamination prior to applying the sealer.
    • Install and align the rear cap within 20 minutes of applying the sealer.
    NOTE:

    Apply the sealer to all locations centrally locating the bead on the rail.

    • Run bead to 5.0 mm, dimension (a), as shown.
    • Where the cap ends on the perimeter rail, extend bead approximately 4.0 mm beyond edge of cap.
    • Run bead, dimension (c), 32 mm from the edge of the cylinder head as shown.
    • Run beads, dimension (b), 20 mm from edge of cylinder head as shown.
  11. Ensure proper use of room temperature vulcanizing (RTV) sealant.

    Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant 

  12. Apply a 2.5 mm bead of sealer to the cylinder head at the intake camshaft bearing rear cap mating surface. Refer to Adhesives, Fluids, Lubricants, and Sealers .
  13. Install the number 6 intake camshaft rear cap.
    1. Tighten the cap bolts evenly to 5 N.m (44 lb in).
    2. Tighten the cap bolts evenly to 10 N.m (89 lb in).
    3. Back the cap bolts out 120 degrees.
    4. Tighten the cap bolts evenly a final pass to 10 N.m (89 lb in).
    14. Fig 9: Identifying Fuel Pump Roller Lifter Orifice
    GM2244396Courtesy of GENERAL MOTORS COMPANY
  14. Remove all excess sealing material from the fuel pump roller lifter bore (1), and ensure the bore is free of debris. Do not allow any excess sealing material to remain within the cylinder head or on any sealing surface.
  15. Remove all excess sealing material from the fuel pump assembly sealing surface (2).
    16. Fig 10: Rear Cylinder Head Opening Plate
    GM2141371Courtesy of GENERAL MOTORS COMPANY
  16. Ensure that the opening plate sealing surface is clean and free of excess sealing material. Install the rear cylinder head opening plate (1) and tighten the bolts to 10 N.m (89 lb in).
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