Engine Block (V6): Component Locations Honda Accord VII

Crankshaft Bore Code Location

Letters or bars have been stamped on the end of the block as a code for the size of each of the four main journal bores.

Use them, and the numbers stamped on the crankshaft (codes for main journal size), to choose the correct bearings. If the codes are indecipherable because of an accumulation of dirt and dust, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent.

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Main journal code locations (Numbers or Bars)

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Scheme 525

1. Remove the connecting rod cap and bearing half (see «OIL PAN REMOVAL»(ref-220834-S35682438202006022100000) ).
2. Clean the crankshaft rod journal and bearing half with a clean shop towel.
3. Place a strip of plastigage across the rod journal.
4. Reinstall the bearing half and cap, and torque the bolts. Tightening torque: 20 N.m (2.0 kgf.m, 14 lbf.ft) + 90° Apply new engine oil to the bolt threads. NOTE: Do not rotate the crankshaft during inspection.
5. Remove the rod cap and bearing half, and measure the widest part of the plastigage. Connecting Rod Bearing-to-Journal Oil Clearance Standard (New): 0.020-0.044 mm (0.0008-0.0017 in.) Service Limit: 0.050 mm (0.0020 in.)
6. If the plastigage measures too wide or too narrow, remove the upper half of the bearing, then 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.
7. 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 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 Journal Code Locations

Numbers or bars have been stamped on the side of each connecting rod as a code for the size of the big end. Use them, and the letters or bars stamped on the crank (codes for rod journal size), to choose the correct bearings. If the codes are indecipherable because of an accumulation of dirt and dust, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent.

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Scheme 527

Connecting rod journal code locations Letters or Bars)

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Scheme 530

1. If the engine is out of the vehicle, go to step 5.
2. Raise the vehicle on the hoist to full height.
3. Drain the engine oil (see «ENGINE OIL REPLACEMENT»(ref-220835-S22878050042006022100000) ).
4. Remove exhaust pipe A (see step 40 in «ENGINE REMOVAL»(ref-220832-S42608250502006022100000) ).
5. Remove the torque converter cover (A) and the two bolts (B) securing the transmission.
6. Remove the bolts securing the oil pan.
7. Using a flat blade screwdriver, separate the oil pan from the block in the places (Scheme 530)
8. Remove the oil pan.

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Scheme 539

1. Remove the engine assembly (see «ENGINE REMOVAL»(ref-220832-S42608250502006022100000) ).
2. Remove the transmission: Manual transmission (see «TRANSMISSION REMOVAL»(ref-220851-S00228740372006022100000) ) Automatic transmission (see «TRANSMISSION REMOVAL»(ref-220852-S22970561842006022100000) )
3. M/T model: Remove the pressure plate (see «PRESSURE PLATE AND CLUTCH DISC REMOVAL»(ref-220850-S06786623742006022100000) ), clutch disc (see «PRESSURE PLATE AND CLUTCH DISC REMOVAL»(ref-220850-S06786623742006022100000) ), and flywheel (see «FLYWHEEL AND PILOT BEARING REPLACEMENT»(ref-220850-S06165768482006022100000) ).
4. A/T model: Remove the drive plate (see «DRIVE PLATE REMOVAL AND INSTALLATION»(ref-220852-S05972580952006022100000) ).
5. Remove the cylinder heads (see «CYLINDER HEAD REMOVAL»(ref-220833-S30972391782006022100000) ).
6. Remove the crankshaft position (CKP) sensor (see «CKP SENSOR REPLACEMENT»(ref-220840-S35445802792006022100000) ).
7. Remove the timing belt drive pulley from the crankshaft.
8. Remove the oil pan (see «OIL PAN REMOVAL»(ref-220834-S35682438202006022100000) ).
9. Remove the engine block end cover.
10. Remove the rocker arm oil control solenoid (VTEC solenoid valve)/oil filter assembly.
11. Remove the oil screen (A), baffle plate (B), and oil pump(C).
12. If you can feel a ridge of metal or hard carbon around the top of any cylinder, remove it with a ridge reamer (A). Follow the reamer manufacturer's instructions. If the ridge is not removed, it may damage the pistons as they are pushed out.
13. Remove the bearing from the cap. Keep all caps/ bearings in order.
14. Remove the upper bearing halves from the connecting rods, and set them aside with their respective caps.
15. Remove the connecting rod caps after setting the crank pin at bottom dead center (BDC) for each cylinder. Remove the piston assembly by pushing on the connecting rod. Take care not to damage the crank pin or cylinder with the connecting rod.
16. After removing a piston/connecting rod assembly, reinstall the cap on the rod.
17. To avoid confusion during reassembly, mark each piston/connecting rod assembly with its cylinder number.
18. Unscrew the bearing cap bolts and bearing cap side bolts in sequence 1/3 turn at a time; repeat the sequence until all bolts are loosened.
19. Remove the bearing cap bolts (A) and bearing cap side bolts (B), then remove the bearing cap (C).
20. Lift the crankshaft (A) out of the engine block, being careful not to damage the journals.
21. Reinstall the main caps and bearings on the engine block in the proper order.

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Scheme 541

1. Remove the crankshaft from the engine block (see «OIL PAN REMOVAL»(ref-220834-S35682438202006022100000) ).
2. Clean the crankshaft oil passages with pipe cleaners or a suitable brush.
3. Check the keyway and threads.
4. Measure out-of-round at the middle of each rod and main journal in two places. The difference between measurements on each journal must not be more than the service limit. Journal Out-of-Round Standard (New): 0.005 mm (0.0002 in.) max. Service Limit: 0.010 mm (0.0004 in.)
5. Measure taper at the edges of each rod and main journal. The difference between measurements on each journal must not be more than the service limit. Journal Taper Standard (New): 0.005 mm (0.0002 in.) max. Service Limit: 0.010 mm (0.0004 in.) Straightness
6. Place the engine block on the surface plate.
7. Clean and install the bearings on the No. 1 and No. 4 journal of the engine block.
8. Lower the crankshaft into the block.
9. Measure the runout on all of the main journals. Rotate the crankshaft two complete revolutions. The difference between measurements on each journal must not be more than the service limit. Crankshaft Total Runout Standard (New): 0.020 mm (0.0008 in.) max. Service Limit: 0.030 mm (0.0012 in.)

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1. Remove the piston from the engine block (see «OIL PAN REMOVAL»(ref-220834-S35682438202006022100000) ).
2. Check the piston for distortion or cracks.
3. Measure the piston diameter at a point 16.0 mm (0.63 in.) from the bottom of the skirt. Piston Diameter Standard (New): 85.975-85.985 mm (3.3848-3.3852 in.) Service Limit: 85.965 mm (3.3844 in.) Oversize Piston Diameter 0.25: 86.225-86.235 mm (3.3947-3.3951 in.) 0.50: 86.475-86.485 mm (3.4045-3.4049 in.)
4. Measure wear and taper in direction X and Y at three levels in each cylinder (Scheme 543) If measurements in any cylinder are beyond the oversize bore service limit, replace the block. If the block has to be rebored, refer to step 7 after reboring. Cylinder Bore Size Standard (New): 86.000-86.015 mm (3.3858-3.3864 in.) Service Limit: 86.065 mm (3.3884 in.) Oversize 0.25: 86.250-86.265 mm (3.3957-3.3963 in.) 0.50: 86.500-86.515 mm (3.4055-3.4061 in.) Reboring Limit: 0.5 mm (0.02 in.) Bore Taper Limit: (Difference between first and third measurement) 0.05 mm (0.002 in.)
5. Scored or scratched cylinder bores must be honed (see «CYLINDER BORE HONING»(ref-220834-S27866531332006022100000) ).
6. Check the top of the engine block for warpage. Measure along the edges and across the center (Scheme 544) Engine Block Warpage Standard (New): 0.07 mm (0.003 in.) max. Service Limit: 0.10 mm (0.004 in.)
7. Calculate the difference between cylinder bore diameter and piston diameter. If the clearance is near or exceeds the service limit, inspect the piston and engine block for excessive wear. Piston-to-Cylinder Bore Clearance Standard (New): 0.015-0.040 mm (0.0006-0.0016 in.) Service Limit: 0.08 mm (0.003 in.)

Scheme 546

1. Measure the cylinder bores (see step 4 ). If the engine block is to be reused, hone the cylinders and remeasure the bores. Only scored or scratched cylinder bores must be honed.
2. Hone the cylinder bores with honing oil and a fine (400 grit) stone in a 60 degree Crosshatch pattern. NOTE: Use only a rigid hone with 400 grit or finer stone, such as Sunnen, Ammco, or equivalent. Do not use stones that are worn or broken.
3. When honing is complete, thoroughly clean the engine block of all metal particles. Wash the cylinder bores with hot soapy water, then dry and oil them immediately to prevent rusting. Never use solvent, it will only redistribute the grit on the cylinder walls.
4. If scoring or scratches are still present in the cylinder bores after honing to the service limit, rebore the engine block. Some light vertical scoring and scratching is acceptable if it is not deep enough to catch your fingernail and does not run the full length of the bore.

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1. Remove the piston from the engine block (see «OIL PAN REMOVAL»(ref-220834-S35682438202006022100000) ).
2. Apply new engine oil to the piston pin snap rings (A) and turn them in the ring grooves until the end gaps are lined up with the cutouts in the piston pin bores (B). NOTE: Take care not to damage the ring grooves.
3. Remove snap rings (A) from both sides of the piston. Start at the cutout in the piston pin bore. Remove the snap rings carefully so they do not go flying or get lost. Wear eye protection.
4. Heat the piston and connecting rod assembly to about 158°F (70°C), then remove the piston pin.