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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 455 (ENGINE MECHANICAL)REPAIR INSTRUCTIONSOFF-VEHICLE REPAIR INSTRUCTIONSVALVE ROCKER ARM AND PUSH ROD REMOVAL
1999 GMC Forward Control 5.7 R, Automatic

Valve Rocker Arm and Push Rod Removal

1999 GMC Forward Control 5.7 R, AutomaticSECTION Valve Rocker Arm and Push Rod Removal
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the valve rocker arm bolts.

    Important:  Place the valve train components in a rack in order to ensure that the components are installed in the same location from which they were removed.

  2. Remove the valve rocker arms.
    Fig 1: Removing Valve Rocker Arms
    G01500657Courtesy of GENERAL MOTORS CORP.
  3. Remove the push rods.
    • The intake push rods measure 146 mm (5.75 in).
    • The exhaust push rods measure 152.51 mm (6.0 in).
    Fig 2: Removing Push Rods
    G01500658Courtesy of GENERAL MOTORS CORP.
  4. Remove the intake manifold gaskets.
    Fig 3: Removing Intake Manifold Gaskets
    G01500659Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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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.