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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Mechanical - 4.3L (LV1)) >> Repair Instructions - Off Vehicle >> Valve Rocker Arm and Push Rod Installation

Valve Rocker Arm and Push Rod Installation

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM3641500Courtesy of GENERAL MOTORS COMPANY

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

  2. GM4807894Courtesy 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.

    Install the valve rocker arm (2) and pushrod (1).

  3. GM1658285Courtesy of GENERAL MOTORS COMPANY

    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, 6, 5, 4, 3, 2.

    Cylinders 1, 3, and 5 are left bank.

    Cylinders 2, 4, and 6 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, 5, and 6 to 30 N.m (22 lb ft).
    2. Tighten the intake valve rocker arm bolts 1, 3, and 2 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, 2, and 4 to 30 N.m (22 lb ft).
    • Tighten the intake valve rocker arm bolts 5, 4, and 6 to 30 N.m (22 lb ft).
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