Rocker Arm and Shaft Inspection

MANUAL INSPECTION
1. Set the No. 1 piston at TDC.
2. Remove the cylinder head cover.
3. Push the mid-rocker arm on the No. 1 cylinder manually.





4. Check that the mid rocker arm moves independently of the primary and secondary intake rocker arms.
5. Check the mid-rocker arm of each cylinder at TDC.
- If the mid-rocker arm does not move, remove the mid, primary and secondary rocker arms as an assembly and check that the pistons in the mid and primary rocker arms move smoothly.
- If any rocker arm needs replacing, replace the primary, mid, and secondary rocker arms as an assembly.

INSPECTION USING SPECIAL TOOLS

CAUTION:
- Before using the Valve Inspection Tool, make sure that the air pressure gauge on the air compressor indicates over 400 kPa (4 kgf/cm2, 57 psi).
- Inspect the valve clearance before rocker arm inspection.
- Cover the timing belt with a shop towel to protect the belt from oil soaking.
- Check the mid rocker arm of each piston at TDC.

1. Remove the cylinder head cover.





2. Plug the relief hole with the special tool.





3. Remove the bolt and washer from the inspection hole. and connect the special tool.
4. Loosen the regulator valve on the valve inspection set, and apply the specified air pressure to the rocker arm pistons.

Specified Air Pressure:
250 kPa (2.5 kgf/cm2, 36 psi)





5. Make sure that the intake primary and secondary rocker arms are mechanically connected by the pistons and that the mid rocker arms do not move when pushed manually.
If any mid rocker arm moves independently of the primary and secondary rocker arms, replace the rocker arms, as a set.
6. Remove the tools.
7. Check for smooth operation of the lost motion assembly. It is compressed slightly when the mid rocker arm is pushed lightly and compressed deeply when the mid rocker arm is pushed firmly.
Replace the lost motion assembly if it does not move smoothly.
8. After inspection, check that the malfunction indicator lamp does not come on.