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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 708 (Engine Mechanical - 2.4L (LE5)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston, Connecting Rod, and Bearing Installation

Piston, Connecting Rod, and Bearing Installation

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

    Fig 1: J-43966-1 Installed Into Connecting Rod Bolt Holes
    GM412431Courtesy of GENERAL MOTORS CORP.
  1. Install the connecting rod bearings. Use NEW bearings.
    1. Install the bearing inserts into the connecting rod and the connecting rod cap.
    2. Lubricate the connecting rod bearings with engine oil.
  2. Install the J-43966-1  into the connecting rod bolt holes. See Special Tools . This protects the crankshaft journal during piston and connecting rod installation.
  3. Install EN-47836  , piston, and the connecting rod to the correct bore. See Special Tools .
    1. Stagger each piston ring end gap equally around the piston.
    2. Lubricate the piston and the piston rings with engine oil.
    3. Do not disturb the piston ring end gap location.
    4. The piston must be installed so that the mark on the top of the piston faces the front of the engine.
    5. Place the piston in its matching bore.
    6. Tap the piston into its bore with a hammer handle. Guide the connecting rod to the connecting rod journal while tapping the piston into place.
    7. Hold the EN-47836  against the engine block until all the rings have entered the cylinder bore. See Special Tools .
    8. Remove the connecting rod guides from the connecting rod bolt holes.
    4. Fig 2: View Of Connecting Rod Nuts And Caps
    GM412430Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the connecting rod cap is properly oriented on the connecting rod.
  4. Install the connecting rod cap.
    5. NOTE: Refer to FASTENER NOTICE .
  5. Install the connecting rod bolts. Always use new bolts.

    Tighten:  Tighten the connecting rod bolts to 25 N.m (18 lb ft), plus 100 degrees using the J 45059  .

  6. Install the remaining connecting rods and piston assemblies.
    7. Fig 3: Measuring Connecting Rod Side Clearance
    GM465919Courtesy of GENERAL MOTORS CORP.
  7. Measure the connecting rod side clearance with a feeler gage.

    The correct clearance is 0.07-0.37 mm (0.0027-0.0145 in).

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