Valve Rocker Arm and Push Rod Installation

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Valve Rocker Arm and Push Rod Installation
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

J 36660-A  Torque Angle Meter

  1. Install the lower intake manifold gaskets.
    Fig 1: Lower Intake Manifold Gaskets
    G01702989Courtesy of GENERAL MOTORS CORP.
  2. Coat the ends of the push rods using prelube GM P/N United States 1052367, GM P/N Canada 992869 or the equivalent.
    IMPORTANT: The intake valve push rods measure 146.0 mm (5.75 in) in length, (yellow).
  3. Install the push rods in their original location.

    The exhaust valve push rods measure 152.5 mm (6.0 in) in length, (green).

    Fig 2: Push Rods
    G01702990Courtesy of GENERAL MOTORS CORP.
  4. Coat the rocker arm friction surfaces using prelube GM P/N United States 1052367, GM P/N Canada 992869 or the equivalent.
    IMPORTANT: Shims may be required under the valve rocker arm pedestals if reconditioning has been performed on the cylinder head or its components.
  5. Install the valve rocker arms in their original positions.
    NOTE: Refer to FASTENER NOTICE .
  6. Install the valve rocker arm bolts.

    Tighten 

    Use the J 36660-A  to tighten the valve rocker arm bolts to 19 N.m (14 lb ft) plus 30 degrees.

    Fig 3: Valve Rocker Arms
    G01702991Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.