Piston And Piston Pin Clearance

WARNING: This page is about a different variant/trim than selected.

Diameter of Piston Pin Bore

Measure the diameter of piston pin bore using an inside micrometer. Refer to "STANDARD AND LIMIT ".

Fig 1: Measuring Diameter Of Piston Pin Bore Using Inside Micrometer
Courtesy of NISSAN MOTOR CO., U.S.A.

Outer Diameter of Piston Pin

Measure outer diameter of piston pin using a micrometer. Refer to "STANDARD AND LIMIT ".

Fig 2: Measuring Outer Diameter Of Piston Pin Using Micrometer
Courtesy of NISSAN MOTOR CO., U.S.A.

Piston to Piston Pin Clearance

(Piston pin clearance) = (Piston pin bore diameter) - (Outer diameter of piston pin)

A: Front mark
B: Piston pin bore grade
C: Piston grade I.D. stamp
D: Piston crown I.D. code stamp
Standard : 0.002 - 0.006 mm (0.0001 - 0.0002 in)

Fig 3: Checking Piston To Piston Pin Clearance
Courtesy of NISSAN MOTOR CO., U.S.A.
If clearance exceeds specification, replace either or both of piston/piston pin assembly and connecting rod assembly with reference to specification of each parts.
Use the piston selection table to replace piston/piston pin assembly. Refer to "HOW TO SELECT PISTON AND BEARING ".
Use the connecting rod bearing selection table to replace connecting rod. Refer to "HOW TO SELECT PISTON AND BEARING ".

NOTE:

The connecting rod small end grade and piston pin hole (piston pin) grade are provided only for the parts installed at the plant. For service parts, no grades can be selected. Only 0 grade is available.
Follow the "CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)" for the values for each grade at the plant.
Regarding marks on piston head, Refer to "HOW TO SELECT PISTON AND BEARING ".

Fig 4: Identifying Connecting Rod Small End Grade And Piston Pin Hole
Courtesy of NISSAN MOTOR CO., U.S.A.