Valve Rocker Arm And Rocker Shaft

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

Measure inside diameter of valve rocker arm and outside diameter of valve rocker shaft, and determine the difference between the two (= oil clearance).
Clearance between arm and shaft:

Standard

0.020 - 0.054 mm (0.0008 - 0.0021 in)

Limit

0.10 mm (0.0039 in)

Fig 1: Measuring Inside Diameter Of Valve Rocker Arm
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Measuring Outer Diameter Of Valve Rocker Shaft
Courtesy of SUBARU OF AMERICA, INC.
If oil clearance exceeds the limit, replace valve rocker arm or shaft, whichever shows greater amount of wear.
Rocker arm inside diameter:

22.020 - 22.041 mm (0.8669 - 0.8678 in)

Rocker shaft diameter:

21.987 - 22.000 mm (0.8656 - 0.8661 in)
If cam or valve contact surface of valve rocker arm is worn or dented excessively, replace valve rocker arm.
Check that valve rocker arm roller rotates smoothly. If not, replace valve rocker arm.