VTEC Rocker Arm Test
VTEC Rocker Arm TestSpecial Tools Required
^ VTEC Air Adaptor 07VAJ-P8A010A VTEC Air Stopper 07VAJ-P8A020A
1. Remove the cylinder head covers.
2. Remove the front upper cover.
3. Set the No. 1 piston at Top Dead Center (TDC).
4. Push on the intake mid rocker arm (A) for the No. 1 cylinder. The mid rocker arm should move independently of the primary rocker arm (B) and secondary rocker arm (C).
^ If the intake mid rocker arm does not move, remove the mid, primary, and secondary intake 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, and retest.
^ If the mid rocker arm moves freely, go to step 5.
5. Repeat step 4 on the remaining intake mid rocker arms with each piston at TDC. When all the mid rocker arms pass the test, go to step 6.
6. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.0 kgf/cm2, 100 psi).
7. Inspect the valve clearance.
8. Cover the timing belt with a shop towel to protect the belt.
9. Remove the two end intake rocker shaft mounting bolts, then install and connect the special tools and an air pressure regulator with a 0 - 100 psi gauge (A) as shown.
10. Loosen the valve on the regulator, and apply the specified air pressure.
Specified Air Pressure: 440 - 540 kPa (4.5 - 5.5 kgf/cm2, 64 - 78 psi)
NOTE: If the synchronizing pistons A and B do not move after applying air pressure, move the primary or secondary rocker arm up and down manually.
11. Make sure that the intake primary rocker arm (A) and intake secondary rocker arm (B) are mechanically connected by the piston and that the mid rocker arm (C) 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.
12. Remove the tools.
13. Check for smooth operation of each lost motion assembly. Replace the lost motion assembly if it does not move smoothly.