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Connecting Rod Bearing Replacement (K20C2): Replacement

  1. Engine - Remove
  2. Transmission - Remove
  3. Cylinder Head - Remove
  4. Oil Pan - Remove
  5. Oil Pump - Remove
  6. Oil Pump Chain - Remove
  7. Baffle Plate - Remove
    Fig 1: Baffle Plate Bolts With Torque Specifications
    GHH406686Courtesy of HONDA, U.S.A., INC.
  8. Connecting Rod Bearing Cap and Bearing Half - Remove
    GHH406687Courtesy of HONDA, U.S.A., INC.

    NOTE:  Keep all connecting rod bearing caps and connecting rod bearings in order.

  9. Connecting Rod Bearing Clearance - Inspect
    GHH406688Courtesy of HONDA, U.S.A., INC.
    		 1. Clean the connecting rod journal and the bearing half with a clean shop towel.

    2. Place plastigage across the rod journal.

    3. Reinstall the bearing half and the connecting rod bearing cap, then torque the bolts to 20 N.m (2.0 kgf.m, 15 lbf.ft) +90 deg..

    NOTE: 

    • Apply new engine oil to the bolt threads and flanges.
    • Do not rotate the crankshaft during inspection.

    4. Remove the connecting rod bearing cap and the bearing half, and measure the widest part of the plastigage.

    5. If the plastigage measures too wide or too narrow, remove the connecting rod bearing cap, and the upper half of the connecting rod bearing. Install a new, complete bearing with the appropriate color code (s), and recheck the clearance. Do not file, shim, or scrape the bearings or the caps to adjust clearance.

    6. If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color listed above or below the current one), and check the clearance again. If the proper clearance cannot be obtained by using the appropriate larger or smaller bearings, replace the crankshaft and start over.
    Connecting Rod Bearing-to-Journal Oil Clearance 
    Standard (New):  0.039-0.057 mm (0.00154-0.00224 in) 
  10. Connecting Rod Bearing - Select

    1. Inspect each connecting rod for cracks and heat damage.

    Connecting Rod Big End Bore Code Locations 

    GHH406689Courtesy of HONDA, U.S.A., INC.

    2. Each connecting rod has a tolerance range from 0 to 0.024 mm (0.00094 in), in 0.006 mm (0.00024 in) increments, depending on the size of its big end bore. It's then stamped with a number or bar (1, 2, 3, or 4/l, ll, lll, or llll) indicating the range. You may find any combination of numbers and bars in any engine. (Half the number or bar is stamped on the connecting rod bearing cap, the other half is on the connecting rod.) If you cannot read the code because of an accumulation of oil and varnish, do not scrub it with a wire brush or scraper. Clean it only with solvent or detergent.

    Big End Bore Size:  48.0 mm (1.890 in) 
    Connecting Rod Journal Code Location 
    GHH406690Courtesy of HONDA, U.S.A., INC.
    		 3. The connecting rod journal codes are stamped on the crankshaft in either location.
    Bearing Identification 
    GHH406691Courtesy of HONDA, U.S.A., INC.
    		 4. Use the big end bore codes and the rod journal codes to select appropriate replacement bearings from the following table.

    NOTE: 

    • Color code is on the edge of the bearing.
    • When using bearing halves of different colors, it does not matter which color is used in the top or bottom.
  11. Connecting Rod Bolt - Inspect
    GHH406692Courtesy of HONDA, U.S.A., INC.
    		 1. Measure the diameter of each connecting rod bolt at point A and point B.

    2. Calculate the difference in diameter between point A and point B.

    3. If the difference in diameter is out of specification, replace the connecting rod bolt.
    Point A-Point B = Difference in Diameter 
    Difference in Diameter 
    Specification:  0-0.1 mm (0-0.004 in) 
  12. Connecting Rod bearing Cap and Bearing Half - Install
    GHH406693Courtesy of HONDA, U.S.A., INC.
    		 1. Apply new engine oil to the threads of the connecting rod bolts.

    2. Seat the rod journals into connecting rod No. 1 and connecting rod No. 4. Line up the mark (A) on the connecting rod and the connecting rod bearing cap.

    3. Install the connecting rod bearing caps and the bolts finger-tight.

    4. Rotate the crankshaft clockwise, and seat the journals into connecting rod No. 2 and connecting rod No. 3. Line up the mark on the connecting rod and the connecting rod bearing cap.

    5. Install the connecting rod bearing caps and the bolts finger-tight.
    GHH406694Courtesy of HONDA, U.S.A., INC.
    		 6. Torque the connecting rod bolts to 20 N.m (2.0 kgf.m, 15 lbf.ft).

    7. Tighten the connecting rod bolts an additional 90 deg..

    NOTE:  Remove the connecting rod bolt if you tightened it beyond the specified angle, inspect the connecting rod bolts. Do not loosen it back to the specified angle.
  13. All Removed Parts - Install
    1. Install the parts in the reverse order of removal.
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