Block and Piston Inspection
WARNING: This page is about a different car, the 2011 Honda Pilot, 2010 Honda Pilot, and 2009 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the pistons (see CRANKSHAFT AND PISTON REMOVAL ) from the engine block.
- Check the pistons for distortion or cracks.
- Measure the piston skirt diameter at a point 16.0 mm (0.63 in.) from the bottom of the skirt.
Piston Skirt Diameter
Standard (New): 88.975-88.985 mm (3.5029-3.5033 in)
Service Limit: 88.965 mm (3.5026 in)
Oversize Piston Skirt Diameter
0.25: 89.225-89.235 mm (3.5128-3.5132 in.)
- Measure the wear and taper in direction X and Y at three levels in each cylinder as shown below. If measurements in any cylinder are beyond the oversize bore service limit, replace the engine block. If the engine 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 (0.010 in)
Bore Taper
Limit: (Difference between first and third measurement) 0.05 mm (0.002 in)
- Hone any scored or scratched cylinder bores (see CYLINDER BORE HONING ).
- Check the top of the engine block for warpage. Measure along the edges and across the center as shown below.
Engine Block Warpage
Standard (New): 0.07 mm (0.0028 in) max.
Service Limit: 0.10 mm (0.0039 in)
- 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 the cylinder bore for excessive wear.
Piston-to-Cylinder Bore Clearance
Standard (New): 0.015-0.040 mm (0.00059-0.00157 in)
Service Limit: 0.08 mm (0.0031 in)