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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Mechanical - 5.3L (L83) Or 6.2L (L86) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Valve Rocker Arm And Push Rod Replacement >> Installation Procedure

Installation Procedure

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NOTE:

Be sure to keep parts in order. Parts must be reinstalled into the original location and position.

    Fig 1: Pushrod Socket, Roller Pivot & Valve Stem Tip
    GM480551Courtesy of GENERAL MOTORS COMPANY
  1. Apply lubricant to the following rocker arm contact surfaces:
    • Pushrod socket (1)
    • Roller pivot (2)
    • Valve stem tip (3)
    2. Fig 2: Valve Rocker Arm And Bolt Assembly And Pushrod
    GM3286016Courtesy of GENERAL MOTORS COMPANY
  2. Install the pushrod (2).
    3. Fig 3: Proper Seating Of Push Rod
    GM3641500Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    NOTE:
    • When using the valve train components again, always install the components to the original location and position.
    • Valve lash is net build. No valve adjustment is required.
    • Lubricate the flange of the valve rocker arm bolts with clean engine oil.
    • Lubricate the valve rocker arms and pushrods with clean engine oil.
    • Ensure the pushrods seat properly to the valve lifter sockets.
    • The rocker arm bolts are not serviced separately.
    • Ensure the pushrods seat properly to the ends of the rocker arms.
    • DO NOT tighten the rocker arm bolts at this time.
  3. Install the rocker arm and bolt assembly.
  4. Rotate the crankshaft until number 1 piston is at top dead center of compression stroke.

    The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3.

    Cylinders 1, 3, 5, and 7 are left bank.

    Cylinders 2, 4, 6, and 8 are right bank.

    5. CAUTION:

    Refer to Fastener Caution

  5. With the engine in the number 1 firing position, tighten the following valve rocker arm bolts:
    1. Tighten the exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N.m (22 lb ft).
    2. Tighten the intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N.m (22 lb ft).
  6. Rotate the crankshaft 360 degrees.
  7. Tighten the following valve rocker arm bolts:
    • Tighten the exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N.m (22 lb ft).
    • Tighten the intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N.m (22 lb ft).
  8. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left Side , or Valve Rocker Arm Cover Replacement - Right Side .
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