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Home >> GMC >> 2003 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 497 (Engine Mechanical (Repair Instructions -- 1 Of 3) -- 4.8L, 5.3L & 6.0L) >> Repair Instructions (On-Vehicle & Off-Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Valve Rocker Arm Cover Replacement - Right >> Installation Procedure

Installation Procedure

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IMPORTANT:
  • All gasket surfaces should be free of oil or other foreign material during assembly.
  • DO NOT reuse the valve rocker arm cover gasket.
  • If the oil fill tube has been removed from the rocker arm cover, install a NEW fill tube during assembly.
  1. Lubricate the O-ring seal of the NEW oil fill tube with clean engine oil.
  2. Insert the NEW oil fill tube into the rocker arm cover.

    Rotate the tube clockwise until locked in the proper position.

  3. Install the oil fill cap into the tube.

    Rotate the cap clockwise until locked in the proper position.

    4. Fig 1: View Of Oil Fill Tube
    GM647798Courtesy of GENERAL MOTORS CORP.
  4. Install a NEW rocker cover gasket (1) into the valve rocker arm cover lip.
    5. Fig 2: Rocker Arm Cover Gasket
    GM490696Courtesy of GENERAL MOTORS CORP.
  5. Install the valve rocker arm cover.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  6. Tighten the rocker arm cover bolts.

    Tighten:  Tighten the bolts to 12 N.m (106 lb in).

    7. Fig 3: View Of Valve Rocker Arm Cover - Right
    GM832211Courtesy of GENERAL MOTORS CORP.
  7. Install the PCV hose.
    8. Fig 4: View Of Throttle Body To Valve Rocker Arm Cover PCV Hose
    GM1235681Courtesy of GENERAL MOTORS CORP.
  8. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the bracket bolts.
  9. Install the ignition coil bracket.
  10. Install the ignition coil bracket studs.

    Tighten:  Tighten the studs to 12 N.m (106 lb in).

    11. Fig 5: View Of Ignition Coil Bracket & Studs - Right
    GM832187Courtesy of GENERAL MOTORS CORP.
  11. Install the heater hose bracket and nut.

    Tighten:  Tighten the nut to 9 N.m (80 lb in).

    12. Fig 6: View Of Heater Hose Bracket Nut
    GM688018Courtesy of GENERAL MOTORS CORP.
  12. Position the surge tank/heater hoses to the heater hose bracket.
  13. Install the spark plug wires to the ignition coils.
  14. Position the engine harness, if necessary.
  15. Install the harness clips (1).
  16. Connect the main electrical connector (4) feeding the ignition coils.
  17. Install the CPA lock (5).
    18. Fig 7: View Of CPA Retainer, Harness Clips, ETC, Coil Harness & Fuel Injectors Electrical Connectors
    GM1235686Courtesy of GENERAL MOTORS CORP.
  18. Install the engine sight shield, if required. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L (RPO LQ4))  or Engine Sight Shield Replacement (6.0L (RPO LQ9)) .
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