LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 429 (Engine Mechanical - 1.8L (LNK)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston, Connecting Rod, and Bearings Cleaning and Inspection (Connecting Rod Bearing Inspect) >> Connecting Rod Measurement

Connecting Rod Measurement

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  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
    Fig 1: View Of Twisted Connecting Rod
    G01546514Courtesy of GENERAL MOTORS CORP.
  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. Measure the piston pin to connecting rod bore using the following procedure:
    1. 4.1. Using an outside micrometer, take 2 measurements of the piston pin in the area of the connecting rod contact.
    2. 4.2. Using an inside micrometer, measure the connecting rod piston pin bore.
    3. 4.3. Subtract the piston pin diameter from the piston pin bore diameter.
    4. 4.4. The clearance should not be more than 0.05 mm (0.0020 in).
  5. If there is excessive clearance, replace the piston pin.
  6. If there is still excessive clearance, replace the connecting rod bushing.
scientia non olet · About LEMON Manuals