Fitting Pistons Toyota RAV4 I

1. Different diameter pistons are used. Piston diameter is identified by size mark ("1", "2" or "3") stamped on top of piston. see scheme 32
2. Different cylinder bore diameters are used. Cylinder bore diameter may be identified by size mark ("1", "2" or "3") stamped on cylinder block deck surface. (Scheme 35)
3. To determine piston-to-cylinder clearance, measure piston diameter and cylinder bore diameter. On 1997 models, measure piston skirt diameter 1.024" (26.00 mm) from top of piston, 90-degree to piston pin. On 1998 models, measure piston skirt diameter.91" (23.0 mm) from top of piston.
4. Measure cylinder bore diameter at 3 different positions, 90 degrees apart,.39" (10.0 mm) from top and bottom of cylinder bore and at center of cylinder bore. Ensure piston diameter and cylinder bore diameter are within specification. See «PISTONS, PINS & RINGS»(ref-49472-S06103226542001011500000) and «CYLINDER BLOCK»(ref-49472-S37388732552001011500000) under ENGINE SPECIFICATIONS.
5. Calculate piston-to-cylinder clearance. Replace replace piston or bore cylinder block for oversize pistons if clearance is not within specification. See «PISTONS, PINS & RINGS»(ref-49472-S06103226542001011500000) under ENGINE SPECIFICATIONS. Pistons are available in.020" (.50 mm) oversize. If replacing piston, ensure replacement piston contains same size mark as size mark on cylinder block.

Scheme 35