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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1155 (Engine Mechanical (Repair Instructions 4 Of 5) - 3.6L (Ly7)) >> Repair Instructions (Off-Vehicle Repair Instructions - Part 3) >> Piston, Connecting Rod, and Bearing Installation >> Piston and Connecting Rod Assembly Procedure

Piston and Connecting Rod Assembly Procedure

WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Proper Piston Orientation With Dot On Piston
    GM1313400Courtesy of GENERAL MOTORS CORP.
  1. Liberally lubricate the cylinder walls, piston rings and piston skirts with engine oil.
    2. IMPORTANT: The piston is directional and must be installed in the engine block in the proper direction.
  2. Select the correctly numbered piston/connecting rod assembly for the cylinder. A dot (1) showing proper piston orientation is located on the top of the piston.
    3. Fig 2: View Of Piston/Connecting Rod Installation Tool
    GM1313403Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: If the connecting rod bearings have been used in a running engine, you must replace them with NEW connecting rod bearings for reassembly.
  3. Install the connecting rod bearing into the connecting rod.
  4. Install the EN 46121  into the connecting rod bolt holes.
  5. Compress the piston rings using the J 8037  or equivalent.
    6. Fig 3: Installing Piston & Connecting Rod Assembly
    GM1313406Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Extreme care must be used when installing the piston and connecting rod in order to be sure the rod does not scrape or nick the cylinder bore, the oil jets, or the crankshaft surfaces.
  6. Using both hands, slowly guide the piston and connecting rod assembly into the cylinder from the top and bottom of the cylinder. DO NOT allow the connecting rod to contact the cylinder wall.
  7. When the J 8037  contacts the deck surface, gently tap the piston into the cylinder using the handle end of a dead-blow hammer. Guide the connecting rod onto the crankshaft bearing journal using the EN 46121  while gently tapping the piston into the cylinder with a soft-blow hammer.
    8. Fig 4: Removing EN 46121 From Connecting Rod Bolt Holes
    GM1313409Courtesy of GENERAL MOTORS CORP.
  8. Remove the EN 46121  from the connecting rod bolt holes.
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