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Piston & Rod Assembly

WARNING: This page is about a different car, the 2001 Mazda Millenia and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure piston, connecting rod and connecting rod cap are match-marked for reassembly reference. Hold piston/rod assembly with connecting rod positioned horizontally. Pull connecting rod upward. Release connecting rod and ensure connecting rod drops freely. Replace piston or piston pin if connecting rod fails to drop freely.
  2. To remove piston from connecting rod, properly support piston in hydraulic press. Press piston pin from connecting rod. Replace piston pin or connecting rod if pressure required to remove piston pin is less than 880 lbs. (400 kg).
  3. Ensure piston pin diameter and pin-to-piston fit are within specification. See PISTONS, PINS & RINGS  table under ENGINE SPECIFICATIONS.
  4. Ensure connecting rod bend, center-to-center length, crankpin bore and piston pin bore diameter are within specification. See CONNECTING RODS  table under ENGINE SPECIFICATIONS.
  5. To assemble piston on connecting rod, ensure front mark on piston ("L" or "R") and connecting rod are facing upward. See Fig 1. Ensure piston is properly supported in hydraulic press. Press in piston pin. Ensure connecting rod pivots freely.
Fig 1: Assembling Piston & Connecting Rod
G93A02457Courtesy of MAZDA MOTORS CORP.
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