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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 722 (Engine Mechanical - 8.1L (Unit Repair)) >> Repair Instructions >> Crankshaft and Bearings Cleaning and Inspection >> Measuring Connecting Rod Side Clearance

Measuring Connecting Rod Side Clearance

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Important:  In order to properly measure the connecting rod side clearance, the piston/connecting rod assembly and bearings must be installed into the engine block and the connecting rod nuts tightened to specifications. Refer to Piston, Connecting Rod, and Bearing Installation .

  1. Install the J 7872  or equivalent to the cylinder block, with the dial indicator plunger against the side of the pair of connecting rods.
  2. With the connecting rods pushed forward, zero the dial indicator. Firmly move the pair of connecting rods side to side and read the measurement on the dial indicator. An optional method is to insert a feeler gage between the connecting rod caps and measure the connecting rod side clearance. Refer to Engine Mechanical Specifications .
    Fig 1: Measuring Connecting Rod Side Clearance
    G01675438Courtesy of GENERAL MOTORS CORP.