Oasis LS L4-2156cc 2.2L SOHC MFI F22B6 (1997)
Piston: Testing and Inspection
1. Check the piston for distortion or cracks.
NOTE:m If the cylinder is bored, an oversized piston must be used.
2. Measure the piston diameter at a point 21 mm (0.8 inch) from the bottom of the skirt.
NOTE: 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.
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Piston Diameter:
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Standard (New):
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No Letter or A: 84.980 - 84.990 mm (3.3457 - 3.3461 inch)
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B: 84.970 - 84.980 mm (3.3453 - 3.3457 inch)
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Service Limit:
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No Letter or A: 84.970 mm (3.3453 inch)
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B: 84.960 mm (3.3449 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): 0.020 - 0.040 mm (0.0008 - 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: 85.230 - 85.240 mm (3.3555 - 3.3559 inch)
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0.50: 85.480 - 85.490 mm (3.3653 - 3.3657 inch)