EM-81 ENGINE MECHANICAL (2JZ-GTE) - CYLINDER BLOCK (b) Measure the cylinder bore diameter in the thrust direc- tions. (See step 5) (c) Subtract the piston diameter measurement from the cylin- der bore diameter measurement. Standard oil clearance: 0.073 - 0.096 mm (0.0029 - 0.0038 in.) Maximum oil clearance: 0.12 mm (0.0047 in.) If the oil clearance is greater than maximum, replace all the 6 pistons. If necessary, replace the cylinder block. 10. INSPECT PISTON RING GROOVE CLEARANCE Using a feeler gauge, measure the clearance between new pis- ton ring and the wall of the piston ring groove. Ring groove clearance: No.1 0.040 - 0.080 mm (0.0016 - 0.0031 in.) No.2 0.030 - 0.070 mm (0.0012 - 0.0028 in.) If the clearance is not as specified, replace the piston. P02086 11. 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 bot- tom of the ring travel, 105 mm (4.13 in.) from the top of the cylinder block. 105 mm EM0224 Z09736 (c) Using a feeler gauge, measure the ring end gap. Ring end gap: Piston ring | STD mm (in.) | Maximum mm (in.) No.1 | 0.300 - 0.400 (0.0118 - 0.0157) | 1.000 (0.0394) No.2 | 0.350 - 0.450 (0.0138 - 0.0178) | 1.050 (0.0413) Oil (Side rail) | 0.130 - 0.380 (0.0051 - 0.0150) | 0.980 (0.0386) If the end gap is greater than maximum, replace the piston ring. If the end gap is greater than maximum, even with a new piston ring, replace the cylinder block. EM7639 1997 SUPRA (RM502U) Author : Date : 1186