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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1584 (Engine Mechanical - 2.4L (Lat)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston, Connecting Rod, and Bearings Cleaning and Inspection >> Connecting Rod Measurement

Connecting Rod Measurement

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Connecting Rod
    GM479859Courtesy of GENERAL MOTORS CORP.
  1. Clean the connecting rods in solvent and dry with compressed air.
  2. Inspect the connecting rods for the following:
    • Signs of being twisted, bent, nicked, or cracked
    • Scratches or abrasion on the rod bearing seating surface
  3. If the connecting rod bores contain minor scratches or abrasions, clean the bores in a circular direction with a light emery paper. DO NOT scrape the rod or rod cap.
  4. If the beam of the rod is scratched or has other damage replace the connecting rod.
  5. Measure the piston pin to connecting rod bore using the following procedure:
    1. Using an outside micrometer, take two measurements of the piston pin in the area of the connecting rod contact.
    2. Using an inside micrometer, measure the connecting rod piston pin bore.
    3. Subtract the piston pin diameter from the piston pin bore diameter.
    4. The clearance should not be more than 0.021 mm (0.0008 in).
  6. If there is excessive clearance, replace the piston pin.
  7. If there is still excessive clearance, replace the connecting rod.
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