Toyota Workshop Service and Repair Manuals

Piston Ring: Specifications

INSPECT RING GROOVE CLEARANCE

Using a feeler gauge, measure the clearance between new piston ring and the wall of the ring groove.

Ring groove clearance:

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

Standard end gap:

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 end gap:

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)