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Tools Required

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.

Important:  The piston and cylinder bore have been measured and the bore has been sized for the proper clearance. Install the piston and connecting rod assembly into the proper cylinder bore. The piston alignment mark MUST face the front of the engine block.

Fig 1: Identifying Piston Rings, Piston And Connecting Rod
G01500811Courtesy of GENERAL MOTORS CORP.
  1. Lightly lubricate the following components with clean engine oil:
    • The piston
    • The piston rings
    • The cylinder bore
    • The bearing surfaces
  2. Stagger the oil control ring end gaps a minimum of 90 degrees.
  3. Stagger the compression ring end gaps a minimum of 25 mm (1.0 in).
  4. Install the J 8037  onto the piston and compress the piston rings.

    Important:  The piston alignment mark MUST be facing the front of the engine block.

  5. Install the J 5239  on the connecting rod bolts.
    Fig 2: Installing Connecting Rod Bolts Guide (J 5239) On Connecting Rod Bolts
    G01500812Courtesy of GENERAL MOTORS CORP.
  6. Install the piston and connecting rod assembly into the proper cylinder bore.
  7. Hold the piston ring compressor firmly against the engine block. Using a wooden hammer handle, lightly tap the top of the piston until all of the piston rings enter the cylinder bore.
    Fig 3: Installing Piston And Connecting Rod Assembly
    G01500813Courtesy of GENERAL MOTORS CORP.
  8. Guide the connecting rod end onto the crankshaft journal.
  9. Install the bearing, cap, and nuts.

    Tighten 

    1. 9.1. Tighten the connecting rod bearing cap nuts a first pass to 20 N.m (15 lb ft).
    2. 9.2. Tighten the connecting rod bearing cap nuts a second pass to 75 degrees using the J 36660-A. 
    Fig 4: Installing Connecting Rod Bearing, Cap And Nuts
    G01500814Courtesy of GENERAL MOTORS CORP.
  10. With the pistons and connecting rods installed, use a soft faced mallet and lightly tap each connecting rod assembly parallel to the crankpin to make sure that the rods have side clearance.
  11. Measure the connecting rod side clearance using a feeler gage or dial indicator. Connecting rod side clearance should be within 0.18-0.44 mm (0.007- 0.017 in).
    Fig 5: Measuring Connecting Rod Side Clearance
    G01500815Courtesy of GENERAL MOTORS CORP.