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Connecting Rod Oil Clearance Inspection

WARNING: This page is about a different car, the 2007 Mazda B3000, 2006 Mazda B3000, 2005 Mazda B3000, 2004 Mazda B3000, and 2003 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:
    • The crankshaft connecting rod journals must be within specification to check the connecting rod bearing journal clearance.
    Fig 1: Positioning Plastigage Across Bearing Surface
    G03312371Courtesy of MAZDA MOTORS CORP.
  1. Position a piece of Plastigage across the bearing surface.
    2. NOTE:
    • Do not turn the crankshaft during this step.
  2. Install and tighten to specification, then remove the connecting rod bearing cap. Refer to ENGINE DISASSEMBLY/ASSEMBLY .
  3. Measure the Plastigage to get the connecting rod bearing journal clearance. The Plastigage should be smooth and flat. A changing width indicates a tapered or damaged crankshaft main bearing or connecting rod. Refer to SPECIFICATIONS .
    Fig 2: Measuring Plastigage
    G03312374Courtesy of MAZDA MOTORS CORP.
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