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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Engine Mechanical - 5.3L (L83) Or 6.2L (L86) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Valve Rocker Arm And Push Rod Installation

Valve Rocker Arm And Push Rod Installation

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    Fig 1: Proper Seating Of Push Rod
    GM3641500Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the pushrods seat properly to the ends of the rocker arms.

  1. Inspect the rocker arm and pushrod assemblies before installation.
    2. Fig 2: Valve Rocker Arm And Push Rod
    GM2892202Courtesy of GENERAL MOTORS COMPANY
    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.
  2. Install the valve rocker arm and pushrod assemblies (1).
    3. Fig 3: View Of Camshaft & Crankshaft Sprocket Alignment Marks
    GM1658285Courtesy of GENERAL MOTORS COMPANY
  3. Rotate the crankshaft until number 1 piston is at top dead center of compression stroke.

    In this position, cylinder number 1 rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. The camshaft and crankshaft sprocket alignment marks (1, 2) will be in the 12 o'clock position. If viewing from the rear of the engine, the additional crankshaft pilot hole, non-threaded, will be in the 10:30 position.

    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.

    4. CAUTION:

    Refer to Fastener Caution

  4. 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).
  5. Rotate the crankshaft 360 degrees.
  6. 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).
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