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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 4.3L V6 - VIN [Z] >> Overhaul >> Rod Bearings

Rod Bearings

  1. Prior to removal, ensure rod caps are marked for cylinder identification. Remove rod cap and bearings. Inspect bearings for wear or damage and replace as necessary.
  2. Check crankshaft rod bearing journal for out-of-round or taper. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS in ENGINE SPECIFICATIONS table at end of this article.
  3. Measure bearing clearance using Plastigage method. See CRANKSHAFT MAIN & CONNECTING ROD BEARINGS in ENGINE SPECIFICATIONS at end of article for bearing clearance.
  4. If clearance exceeds specifications, undersize bearings possibly can be used in combination to produce correct clearance. If clearance is still excessive, crankshaft must be reconditioned.
  5. Clean crankshaft journal and bearing surface in rod. Insert bearings in rod and cap, then lubricate bearing surfaces with oil. Pull piston and rod assembly down onto crankshaft.
  6. Install cap and tighten to specification. Check connecting rod side clearance. For specification, see CRANKSHAFT MAIN & CONNECTING ROD BEARINGS table in ENGINE SPECIFICATIONS at end of article.
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