Rocker Arm Assembly: Testing and Inspection

MANUAL INSPECTION
1. Set the No. 1 piston at TDC.
2. Remove the ignition wire cover and the wires.





3. Remove the ignition wire clamps while pulling up on the lock.
4. Remove the cylinder head cover.
5. Push the mid rocker arms on the No. 1 cylinder manually.





6. Check that each mid rocker arm moves independently of the primary and secondary rocker arms.
7. Check the mid rocker arms 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 prevent getting oil on the belt.
- Check the mid rocker arms of each cylinder at TDC .

1. Remove the cylinder head cover.





2. Plug the relief hole with the special tool (Air stopper).





3. Remove the bolt and washer from the inspection hole and connect the valve inspection tool.
4. Apply specified air pressure to the rocker arm pistons after loosening the regulator valve on the valve inspection tool.

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





5. Make sure that the 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 the operation of the lost motion assembly by pushing on the mid rocker arm. The lost motion assembly should compress fully and operate smoothly through its full stroke. Replace the assembly if it does not work smoothly.
8. After inspection, check that the Malfunction Indicator Lamp (MIL) does not come on.