2021 Honda Odyssey EXFACTORY OEM SERVICE PROCEDURE

Engine Block Overhaul: Inspection

Connecting Rod and Crankshaft End Play Inspection 

  1. Connecting Rod and Crankshaft End Play - Inspect
    GHH444268Courtesy of HONDA, U.S.A., INC.
    		 1. Measure the connecting rod end play with a feeler gauge (A) between the connecting rod (B) and the crankshaft (C).

    Connecting Rod End Play 

    2. If the connecting rod end play is beyond the service limit, install a new connecting rod, and recheck. If it is still beyond the service limit, replace the crankshaft.
    Standard (New):  0.15-0.35 mm (0.006-0.013 in) 
    Service Limit:  0.45 mm (0.017 in) 
    GHH444269Courtesy of HONDA, U.S.A., INC.
    		 3. Push the crankshaft firmly away from the dial indicator by prying, and zero the dial against the end of the crankshaft. Then pull the crankshaft firmly back toward the indicator by prying; the dial reading should not exceed the service limit.

    Crankshaft End Play 

    4. If the crankshaft end play is beyond the service limit, replace the thrust washers and recheck. If it is still beyond the service limit, replace the crankshaft.
    Standard (New):  0.10-0.35 mm (0.0039-0.0138 in) 
    Service Limit:  0.45 mm (0.0177 in) 

    Main Bearing Clearance Inspection 

  2. Main Bearing Cap and Bearing Half - Remove
  3. Main Bearing Clearance - Inspect
    GHH444270Courtesy of HONDA, U.S.A., INC.
    		 1. Clean each main journal and the bearing half with a clean shop towel.

    2. Place one strip of plastigage across each main journal.

    NOTE:  If the engine is still in the vehicle when you bolt the main cap down to check the clearance, the weight of the crankshaft and the drive plate will flatten the plastigage further than just the torque on the cap bolt and give you an incorrect reading. For an accurate reading, support the crank with a jack under the counterweights, and check only one bearing at a time.

    3. Reinstall the main bearings and the main bearing caps, then torque the bearing cap bolts (A) to 40 N.m (4.1 kgf.m, 30 lbf.ft) + 47°, and the bearing cap side bolts (B) to 49 N.m (5.0 kgf.m, 36 lbf.ft) in the proper sequence.

    • Apply new engine oil to the bolt threads and flanges.
    • Do not rotate the crankshaft during inspection.
    GHH444271Courtesy of HONDA, U.S.A., INC.
    		 4. Remove the main bearing caps and the bearing halves, and measure the widest part of the plastigage.

    Main Bearing-to-Journal Oil Clearance 

    5. 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.

    6. 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 and start over.
    Standard (New):  0.019-0.045 mm (0.00075-0.00177 in) 
    Service Limit:  0.050 mm (0.00197 in) 
  4. Crankshaft Main Bearing - Select
    Block Bore Code Locations 
    GHH444272GHH444273GHH444274Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.HONDA, U.S.A., INC.

    Main Journal Code Locations 

    GHH444272GHH444273GHH444274Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    Factory Service Tools

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    When to See a Mechanic

    Stop DIY work and contact a certified mechanic immediately if any of the following apply:

    • • You smell fuel, burning insulation, or see smoke.
    • • Brakes feel soft, pull hard to one side, or make grinding noises.
    • • The engine overheats, stalls repeatedly, or misfires under load.
    • • You are missing required tools, torque specs, or safe lifting equipment.
    • • You are not confident in the next step or safety outcome.

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