Lexus Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston ring groove clearance

No.1 ................................................................................................................................................................... 0.03 to 0.08 mm (0.0012 to 0.0031 inch) 
No.2 ...................................................................................................................................................................  0.02 t0 0.06 mm (0.0008 to 0.0024 inch)
Oil ......................................................................................................................................................................  0.03 to 0.11 mm (0.0012 to 0.0043 inch)

Piston ring end gap

Standard

No.1 .............................................................................................................................................................  0.30 to 0.40 mm (0.0118 to 0.0157 inch)
No.2 .............................................................................................................................................................  0.50 to 0.60 mm (0.0197 to 0.0236 inch)
Oil (Side rail) ...............................................................................................................................................  0.15 to 0.40 mm (0.0059 to 0.0157 inch)

Maximum

No.1 .........................................................................................................................................................................................  0.95 mm (0.0374 inch)
No.2 .........................................................................................................................................................................................  1.05 mm (0.0413 inch)
Oil (Side rail ............................................................................................................................................................................  1.00 mm (0.0394 inch)