Block & Piston Inspection: Notes
WARNING: This page is about a different car, the 2003 Acura 3.2TL, 2002 Acura 3.2TL, 2001 Acura 3.2TL, 2000 Acura 3.2TL, and 1999 Acura 3.2TL. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the piston from the cylinder block. See CRANKSHAFT & PISTON .
- Check the piston for distortion or cracks.
- Measure the piston diameter at a point .63" (16 mm) from the bottom of the skirt. See Fig 1 and PISTON & OVERSIZE PISTON DIAMETER table.PISTON & OVERSIZE PISTON DIAMETER
Application Specification - In. (mm) Piston Diameter Standard (New) 3.5029-3.5033 (88.975-88.985) Service Limit 3.5026 (88.965) Oversize Piston Diameter .25 3.5128-3.15132 (89.225-89.235) .50 3.5226-3.5230 (89.475-89.485) - Measure wear and taper in directions X and Y at 3 levels in each cylinder. See Fig 2
- If the measurements in any cylinder are beyond the oversize bore service limit, replace the cylinder block.
- If the block is to be rebored, see step 6 after reboring.
CYLINDER BORE SIZE/OVERSIZE/BORE TAPERApplication Specification - In. (mm) Cylinder Bore Size Standard (New) .3.5039-3.5045 (89-89.015) Service Limit 3.5065 (89.065) Oversize .25 3.5138-3.5144 (89.250-89.265) .50 3.5236-3.5242 (89.500-89.515) Reboring Limit .02 (.5) Bore Taper Limit (1) .002 (.05) (1) Difference between first and third measurement. - Scored or scratched cylinder bores must be honed.
- Check the top of the cylinder block for warpage. Measure along the edges and across the center. See Fig 3 and CYLINDER BLOCK WARPAGE table.CYLINDER BLOCK WARPAGE
Application Specification - In. (mm) Standard (New) .003 (.07) Service Limit .004 (.10) - Calculate the difference between cylinder bore diameter and piston. See Fig 4 and PISTON-TO-BLOCK CLEARANCE table.PISTON-TO-BLOCK CLEARANCE
Application Specification - In. (mm) Standard (New) .0006-.0016 (.015-.040) Service Limit .003 (.08)