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Piston And Connecting Rod Assembly Note

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata, 2004 Mazda MX-5 Miata, and 2003 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install one piston pin clip into the clip groove in the piston.
  2. Assemble the piston and the connecting rod.
  3. Apply clean engine oil to the piston pin.
  4. Install the piston pin from the side opposite the clip.
  5. Tap the piston pin in with the SST  until the pin contacts the clip. If the pin cannot be installed easily, replace the connecting rod.
    Fig 1: Installing Piston Pin
    G02831754Courtesy of MAZDA MOTORS CORP.
  6. Install the second clip into the clip groove in the piston.
  7. NOTE:
    • The upper and lower rails are the same. They can be installed with either face upward.
  8. Install the three-piece oil rings on the pistons.
    1. Apply clean engine oil to the oil ring spacer and rails.
    2. Install the oil ring spacer with the ends upward.
    3. Install the upper and lower rails.
      Fig 2: Installing Three-Piece Oil Rings
      G02831755Courtesy of MAZDA MOTORS CORP.
  9. Verify that the spacer tang separates the rails, and that the rails turn smoothly in both directions.
    Fig 3: Checking Oil Ring Installation
    G02831756Courtesy of MAZDA MOTORS CORP.
  10. Using a piston ring expander, install the second ring with the scraper face downward.
    Fig 4: Installing Second Ring
    G02831757Courtesy of MAZDA MOTORS CORP.
  11. Using a piston ring expander, install the top ring with the chamfer facing upward.
  12. Apply clean engine oil to the top and second piston rings.
  13. Position the end gaps of the rings as shown.
    Fig 5: Positioning Piston Ring End Gaps
    G02831758Courtesy of MAZDA MOTORS CORP.
  14. Protect the connecting rod bolts with rubber sleeves.
    Fig 6: Installing Rubber Sleeves On Connecting Rod Bolts
    G02831759Courtesy of MAZDA MOTORS CORP.
  15. Apply clean engine oil to the cylinder walls, pistons, and piston rings.
  16. Inspect the piston rings for correct end gap alignment.
  17. Insert each piston into the cylinder block with the mark facing the front of the engine. Use a piston ring compressor.
    Fig 7: Installing Piston & Connecting Rod
    G02831760Courtesy of MAZDA MOTORS CORP.