Tacoma 2WD V6-3.4L (5VZ-FE) (1995)
Piston: Testing and Inspection
Inspect Oil Clearance
NOTE: There are 3 sizes of the standard piston diameter, marked "1", "2" and "3" accordingly. The mark is stamped on the piston top.
1. Using a micrometer, measure the piston diameter at right angles to the piston pin center line, 26 mm (1.02 inch) from the piston head.
Piston diameter:
STD:
Mark "1": 93.356 - 93.666 mm (3.6754 - 3.6758 inch)
Mark "2": 93.367 - 93.376 mm (3.6759 - 3.6762 inch)
Mark "3": 93.377 - 93.389 mm (3.6763 - 3.6766 inch)
O/S 0.50: 93.856 - 93.886 mm (3.6951 - 3.6963 inch)
2. Measure the cylinder bore diameter in the thrust directions.
3. Subtract the piston diameter measurement from the cylinder bore diameter measurement.
Standard oil clearance: 0.134 - 0.154 mm (0.0053 - 0.0060 inch)
Maximum oil clearance: 0.174 mm (0.0069 inch)
If the oil clearance is greater than maximum, replace all the 6 pistons. If necessary, rebore all the 6 cylinders or replace the cylinder block.
NOTE: (Use new cylinder block): Use a piston with the same number mark as the cylinder bore diameter marked on the cylinder block.