Piston Ring End Gap

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

Check if the diameter of the cylinder bore is within specification.
Refer to "PISTON TO CYLINDER BORE CLEARANCE ".
Insert the piston ring into the middle of the cylinder using the piston, and measure gap.
1. Standard
  1. Top ring: 0.23 - 0.33 mm (0.0091 - 0.0130 in)
  2. 2nd ring: 0.25 - 0.40 mm (0.0098 - 0.0157 in)
  3. Oil ring: 0.20 - 0.60 mm (0.0079 - 0.0236 in)
  Fig 1: Inserting Piston Ring Into Middle Of The Cylinder Using Piston, And Measuring Gap
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Limit:
  1. Top ring: 0.56 mm (0.0220 in)
  2. 2nd ring: 0.52 mm (0.0205 in)
  3. Oil ring: 0.96 mm (0.0378 in)
If out of specification, replace piston ring. If the gap still exceeds the limit even with a new ring, re-bore the cylinder and use oversized piston and piston ring.