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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 870 (Engine Mechanical) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston and Connecting Rod Assemble >> Tools Required

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.

J 24086-C  Piston Pin Remover and Installer Set

Important:  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 Fork Insert J 24086-310 Into Fixture J 24086-10
    G01500736Courtesy of GENERAL MOTORS CORP.
  2. Lubricate the piston pin with clean engine oil.

    Important:  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: Assembling Piston, Connecting Rod And Adapter J 24086-6A
    G01500737Courtesy of GENERAL MOTORS CORP.
  4. Adjust installation pin J 24086-9  to G-4.
    Fig 3: Identifying Installation Pin J 24086-9
    G01500738Courtesy 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: Inserting Pin J 24086-9 Through Fixture J 24086-10 And To Piston Pin
    G01500739Courtesy 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.

    Important:  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.

      Fig 5: Installing Piston Rings Onto Piston
      G01500740Courtesy of GENERAL MOTORS CORP.
    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.
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