Honda CR-V: Block and Piston Inspection

1. Remove the crankshaft and pistons.

2. Check the piston for distortion or cracks.

3. Measure the piston diameter at a point 13 mm (0.5 in.) from the bottom of the skirt. There are two standard-size pistons (No Letter or A, and B). The letter is stamped on the top of the piston. Letters are also stamped on the block as cylinder bore sizes.

Piston Diameter

Standard (New):
No Letter (or A): 86.980-86.990 mm (3.4244-3.4248 in.)
B: 86.970-86.980 mm (3.4240-3.4244 in.)
Service Limit: No Letter (or A): 86.930 mm (3.4224 in.)
B: 86.920 mm (3.4220 in.)

Oversize Piston Diameter
0.25: 87.230-87.240 mm (3.4342-3.4346 in.)

Honda CR-V. Engine Block

4. Measure the wear and taper in direction X and Y at three levels inside each cylinder as shown. If the measurements in any cylinder are beyond the Oversize Bore Service Limit, replace the block. If the block is being rebored, refer to step 7 after reboring.

Cylinder Bore Size

Standard (New):
A or I: 87.010-87.020 mm (3.4256-3.4260 in.)
B or II: 87.000-87.010 mm (3.4252-3.4256 in.)
Service Limit: 87.070 mm (3.4279 in.)

Oversize Bore
0.25: 87.250-87.260 mm (3.4350-3.4354 in.)

Reboring Limit: 0.25 mm (0.01 in.) max.

Bore Taper

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

Honda CR-V. Engine Block

5. Scored or scratched cylinder bores must be honed.

6. Check the top of the 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.)

Honda CR-V. Engine Block

7. Calculate the difference between the cylinder bore diameter and the piston diameter. If the clearance is near or exceeds the service limit, inspect the piston and cylinder bore for excessive wear.

Piston-to-Cylinder Bore Clearance

Standard (New): 0.020-0.040 mm (0.0008-0.0016 in.)
Service Limit: 0.05 mm (0.002 in.)

Honda CR-V. Engine Block

Cylinder Bore Honing

Only a scored or scratched cylinder bore must be honed.

1. Measure the cylinder bores.

If the block is to be reused, hone the cylinders, and remeasure the bores.

2. Hone the cylinder bores with honing oil and a fine (400 grit) stone in a 60 degree cross-hatch pattern (A). 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.

Honda CR-V. Engine Block

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 the engine block 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.


 Piston, Pin, and Connecting Rod Replacement

Disassembly 1. Remove the piston from the engine block. 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

 Piston Ring Replacement

1. Remove the piston from the engine block. 2. Using a ring expander (A), remove the old piston rings (B). 3. Clean all ring grooves thoroughly with a squared-off broken ring or ring groove cleaner

 Crankshaft Installation

Special Tools Required Driver 077 49-00 10000 Oil seal driver attachment, 96 mm 07ZAD-PNAA.100 1. Check the connecting rod bearing clearance with plastigage. 2. Check the main bearing clearance w


 Protecting Larger Children

When a child reaches the recommended weight or height limit for a forward-facing child seat, the child should sit in a back seat on a booster seat and wear the lap/ shoulder belt. The following pages give instructions on how to check proper seat belt fit, what kind of booster seat t

 Heater Unit/Core Replacement

SRS components are located in this area. Review the SRS component locations, and the precautions and procedures before doing repairs or service. 1. Make sure you have anti-theft codes for the audio system and the navigation system (if equipped). 2. Make sure the ignition is OFF, then disconnect the

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