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Acura RL. Manual - part 466

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.)

Fig. 28: Identifying Journal Out-Of-Round
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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): 0.025 mm (0.0010 in.) max.

2007 Acura RL

2005-08 ENGINE Engine Block - RL

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Service Limit: 0.030 mm (0.0012 in.)

Fig. 29: Measuring Crankshaft Total Runout
Courtesy of AMERICAN HONDA MOTOR CO., INC.

BLOCK AND PISTON INSPECTION

1. Remove the piston from the engine block (see CRANKSHAFT AND PISTON REMOVAL ).

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): 88.975-88.985 mm (3.5029-3.5033 in.)

Service Limit: 88.965 mm (3.5026 in.)

Oversize Piston Diameter

0.25: 89.225-89.235 mm (3.5128-3.5132 in.)

2007 Acura RL

2005-08 ENGINE Engine Block - RL

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Fig. 30: Measuring Piston Diameter
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Measure wear and taper in direction X and Y at three levels in each cylinder as shown. 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): 89.000-89.015 mm (3.5039-3.5045 in.)

Service Limit: 89.065 mm (3.5065 in.)

Oversize

0.25: 89.250-89.265 mm (3.5138-3.5144 in.)

Reboring Limit: 0.25 mm (0.01 in.)

Bore Taper

Limit: (Difference between first and third measurement) 0.05 mm (0.002 in.)

2007 Acura RL

2005-08 ENGINE Engine Block - RL

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Fig. 31: Identifying Cylinder Wear And Taper Measuring Direction
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Scored or scratched cylinder bores must be honed (see CYLINDER BORE HONING ).

6. Check the top of the engine block for warpage. Measure along the edges and across the center as

shown.

Engine Block Warpage

Standard (New): 0.07 mm (0.003 in.) max.

Service Limit: 0.10 mm (0.004 in.)

2007 Acura RL

2005-08 ENGINE Engine Block - RL

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