Main Bearing Clearance Inspection

Remove the bearing cap bridge, the bearing caps, and the bearing halves (see CRANKSHAFT AND PISTON REMOVAL ).
Clean each main journal and bearing half with a clean shop towel.
Place one strip of plastigage across each main journal.
Reinstall the bearings, the bearing caps, and bearing cap bridge, then torque the bearing cap bolts to 25 N.m (2.5 kgf.m, 18 lbf.ft) in the proper sequence.
NOTE:
- Apply new engine oil to the bolt threads and flanges.
- Do not rotate the crankshaft during inspection.
  
  Fig 1: Bearing Cap Bolts Removing Order
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Tighten the bearing cap bolts an additional 40'

Fig 2: Identifying Bearing Cap Bolts Angle
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the bearing cap bridge, the bearing caps, and the bearings haves, and measure the widest part of the plastigage.
Main Bearing-to-Journal Oil Clearance

Standard (New): 0.018-0.036 mm (0.00071-0.00142 in)

Service Limit: 0.050 mm (0.00197 in)

Fig 3: Measuring Main Bearing To Journal Oil Clearance
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the plastigage measures too wide or too narrow, remove the crankshaft, and remove the upper half of the bearing. Install a new, complete bearing with the same color code, and recheck the clearance. Do not file, shim, or scrape the bearings or the caps to adjust clearance.
If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color listed above or below that one), and check the clearance again. If the proper clearance cannot be obtained by using the appropriate larger or smaller bearings, replace the crankshaft (see CRANKSHAFT AND PISTON REMOVAL ) and start over.