Toyota Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston ring groove clearance 

No.1 .....................................................................................................................................................................   0.02 - 0.07 mm (0.0008 - 0.0028 inch) 
No.2 .....................................................................................................................................................................   0.02 - 0.06 mm (0.0008 - 0.0024 inch) 
Oil ........................................................................................................................................................................   0.04 - 0.12 mm (0.0016 - 0.0047 inch)

Piston ring end gap 

Standard

No.1 ...............................................................................................................................................................   0.25 - 0.35 mm (0.0098 - 0.0138 inch) 
No.2 ...............................................................................................................................................................   0.35 - 0.45 mm (0.0138 - 0.0177 inch) 
Oil (Side rail) ................................................................................................................................................   0.15 - 0.40 mm (0.0059 - 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)