Inspection Using Special Tools

NOTE:
- Before using the Valve Inspection Tool, make sure that the air pressure gauge on the air compressor indicates over 400 kPa (57 psi).

- Inspect the valve clearance before rocker arm inspection.

- Cover the timing belt with a shop towel to protect the belt from oil.

- Check the intake primary rocker arm of each cylinder at TDC.


1. Remove the cylinder head cover.







2. Plug the relief hole with the special tool.

Applying Air Pressure For Testing:

3. Remove the sealing bolt from the inspection hole, and connect the Valve Inspection Tool.


NOTE: Remove any oil from the bolt threads and camshaft holder threads before retightening the sealing bolt.

4. Loosen the regulator valve on the valve inspection tool, and apply the specified air pressure to the rocker arm synchronizing pistons A and B.


Specified Air Pressure: 400 kPa (57 psi)

VTEC Engagement Inspection - 1:

5. With the specified air pressure applied, push up the timing plate 2 - 3 mm (0.08 - 0.12 in) at plate end; the synchronizing piston will pop out and engage the intake mid, primary and secondary rocker arms. Visually check the engagement of the synchronizing pistons A and B.


NOTE:
- The synchronizing piston can be seen in the gap between the mid, secondary and primary rocker arms.

- With the timing plate engaged in the groove on the timing piston, the piston is locked in the pushed out position.

- Do not apply too much force when pushing up the timing plate.






6. Make sure that the intake primary and secondary rocker arms are mechanically connected by the piston and that the mid rocker arm does not move when pushed manually.

- If any intake mid rocker arm moves independently of the primary and secondary rocker arms, replace the rocker arms as a set.

VTEC Piston Location at Low RPM (disengagement):

7. Stop applying air pressure and push up the timing plate; the synchronizing pistons will snap back to their original positions.

Visually check the disengagement of the synchronizing pistons A and B.


NOTE:
- When the timing plate is pushed up, it releases the timing piston, letting the return spring move the synchronizing pistons to their original positions.

- Replace the intake rocker arms as an assembly if either does not work correctly.

8. Remove the special tools.


9. Check for smooth operation of each lost motion assembly. It is compressed slightly when the intake mid rocker arm is lightly pushed and compressed deeply when the mid rocker arm is strongly pushed.

- Replace the lost motion assembly if it does not move smoothly.


10. After inspection, check that the MIL does not come on.