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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 389 (Engine Mechanical - 3.1L V6 - VIN (J) Unit Repair) >> Repair Instructions >> Piston and Connecting Rod Assemble

Piston and Connecting Rod Assemble

WARNING: This page is about a different car, the 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required: J 24086-C  Piston Pin Remover and Installer Set

NOTE: Assemble the piston for the specific cylinder with the connecting rod for the corresponding crankshaft journal.
  1. Install the fork insert J 24086-310 into fixture J 24086-10.
    Fig 1: Installing Special Tools
    G01763825Courtesy of GENERAL MOTORS CORP.
  2. Lubricate the piston pin with clean engine oil.
    NOTE: Ensure that the marks on the piston and connecting rod are aligned the same as when removed. If installing a new piston, ensure that the arrow on top faces towards the front of the engine. If no identification marks were made during disassembly, ensure that the flat area on the bottom of the piston pin skirt is aligned with the small dimple above the connecting rod crankshaft bearing bore.
  3. Assemble the piston, connecting rod and adapter J 24086-6A and install onto fixture J 24086-10.
    Fig 2: Assemble The Piston, Connecting Rod And Adapter
    G01763826Courtesy of GENERAL MOTORS CORP.
  4. Adjust installation pin J 24086-9 to G-4.
    Fig 3: Adjust Installation Pin J 24086-9 To G-4
    G01763827Courtesy of GENERAL MOTORS CORP.
    NOTE: After the installer hub bottoms on the support assembly, do not exceed 35 000 kPa (5,000 psi) pressure, this could cause damage to the tool.
  5. Insert pin J 24086-9 through fixture J 24086-10 and to the piston pin.
  6. Press pin J 24086-9 until the install bottoms on fixture J 24086-10.
    Fig 4: Installing Special Tools
    G01763828Courtesy of GENERAL MOTORS CORP.
    NOTE: Use a piston ring expander to install the piston rings. The rings may be damaged if expanded more than necessary.
    NOTE: To provide an effective compression seal, the ring gaps must be staggered a minimum of 90 degrees.
  7. Using piston ring pliers, install the piston rings onto the piston.
    1. 7.1. Install the oil control ring spacer into the bottom groove of the piston.
    2. 7.2. Install the lower oil control ring.

      The oil control rings do not have a dimple or orientation mark and may be installed in either direction.

    3. 7.3. Install the upper oil control ring.
    4. 7.4. Install the middle compression ring with the dot facing up.
    5. 7.5. Install the top compression ring in either direction. The ring has no orientation markings.
      Fig 5: Use A Piston Ring Expander To Install The Piston Rings
      G01763829Courtesy of GENERAL MOTORS CORP.
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