Baja F4-2.5L SOHC (2003)
DISASSEMBLY
1. Remove bolts which secure rocker shaft.
2. Extract rocker shaft. Remove valve rocker arms, springs, plates and shaft supports from rocker shaft.
NOTE: Arrange all removed parts in order so that they can be installed in their original positions.
3. Remove nut and adjuster screw from valve rocker.
ASSEMBLY
1. Install adjuster screw and nut to valve rocker.
2. Arrange valve rocker arms, springs and shaft supports in assembly order and insert valve rocker shaft.
Tightening torque (Shaft supports installing bolts: 5 Nm (0.5 kgf-m, 3.6 ft. lbs.)
NOTE: Valve rocker arms, rocker shaft and shaft supports have identification marks. Ensure parts with same markings are properly assembled.
3. Install valve rocker shaft securing bolts.
INSPECTION
VALVE ROCKER ARM AND ROCKER SHAFT
1. 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 inch)
Limit 0.10 mm (0.0039 inch)
2. 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 inch)
Rocker shaft diameter: 21.987 - 22.000 mm (0.8656 - 0.8661 inch)
3. If cam or valve contact surface of valve rocks, arm is worn or dented excessively, replace valve rocker arm.
4. Check that valve rocker arm roller rotates smoothly. If not, replace valve rocker arm.