Del Sol Si VTEC L4-1590cc 1.6L DOHC (VTEC) MFI (1997)
Piston: Testing and Inspection
1. Check the piston for distortion or cracks.
NOTE: If cylinder is bored, an oversized piston must be used.
2. Measure piston diameter at distance A from the bottom of the skirt.
A: 5 mm (0.2 inch)
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Piston Diameter:
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Standard (New): 80.98-80.99 mm (3.1882-3.1886 inch)
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Service Limit: 80.97 mm (3.1878 inch)
3. Calculate the difference between the cylinder bore diameter and piston diameter.
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Piston-to-Cylinder Clearance
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Standard (New): 0.010-0.040 mm (0.0004-0.0016 inch)
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Service Limit: 0.05 mm (0.002 inch)
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If the clearance is near or exceeds the service limit, inspect the piston and cylinder block for excessive wear.
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Oversize Piston Diameter:
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0.25: 81.23-81.24 mm (3.1980-3.1984 inch)