ENGINE – ENGINE MECHANICAL EG–109 2. INSPECT PISTON A. Inspect piston oil clearance (a) Using a micrometer, measure the piston diameter at right angles to the piston pin center line, 34 mm (1.34 in.) from the piston head. Piston diameter: 2JZ–GE 85.935–85.945 mm (3.3833–3.3837 in.) 2JZ–GTE 85.917–85.927 mm (3.3826–3.3830 in.) (b) Measure the cylinder bore diameter in the thrust directions. (See step 4 in cylinder block inspection) (c) Subtract the piston diameter measurement from the cylinder bore diameter measurement. Standard oil clearance: 2JZ–GE .055–0.078 mm (0.0022–0.0031 in.) 2JZ–GTE .073–0.096 mm (0.0029–0.0038 in.) Maximum oil clearance: 2JZ–GE .10 mm (0.0039 in.) 2JZ–GTE .12 mm (0.0047 in.) If the oil clearance is greater than maximum, replace all the 6 pistons. If necessary, replace the cylinder block. P02176 34 mm B. Inspect piston ring groove clearance Using a feeler gauge, measure the clearance between new piston ring and the wall of the piston ring groove. Ring groove clearance: No.1 2JZ–GE 0.011–0.070 mm (0.0004–0.0028 in.) 2JZ–GTE 0.040–0.080 mm (0.0016–0.0031 in.) No.2 .030–0.070 mm (0.0012–0.0028 in.) If the clearance is not as specified, replace the piston. C. Inspect piston ring end gap (a) Insert the piston ring into the cylinder bore. (b) Using a piston, push the piston ring a little beyond the bottom of the ring travel, 105 mm (4.13 in.) from the top of the cylinder block. P02086 EM0224 105 mm Z09736