VTEC Rocker Arms
VTEC Rocker Arm TestSpecial Tools Required
^ Air pressure regulator 07AAJ-PNAA100
^ VTEC air adapter 07VAJ-P8A010A
1. Start the engine and let it run for 5 minutes, then turn the ignition switch OFF.
2. Remove the cylinder head cover.
3. Set the No. 1 piston at top dead center (TDC).
4. Push on the intake 1st rocker arm (A) for the No. 1 cylinder. Make sure that the intake 1st rocker arm and the intake 2nd rocker arm (B) are mechanically connected by the synchronizing pistons and that the intake 2nd rocker arm does not move when pushed manually. Then move the intake 3rd rocker arm (C) for the No. 1 cylinder. The intake 3rd rocker arm should move independently of the intake 1st rocker arm.
^ If the intake 2nd rocker arm does not move independently and the intake 3rd rocker arm moves independently, go to step 5.
^ If the intake 2nd rocker arm moves independently, remove and disassemble the rocker arm assembly, and check that the synchronizing pistons between the intake 1st and 2nd rocker arms move smoothly. If any rocker arm or synchronizing piston needs replacing, replace the rocker arms for the cylinder as an assembly.
^ If the intake 3rd rocker arm does not moves independently, remove and disassemble the rocker arm assembly, and check that the synchronizing pistons between the intake 2nd and 3rd rocker arms move smoothly. If any rocker arm or synchronizing piston needs replacing, replace the rocker arms for the cylinder as an assembly.
5. Push on the exhaust 1st rocker arm (A) for the No. 1 cylinder. Make sure that the exhaust 1st rocker arm and the exhaust 2nd rocker arm (B) are mechanically connected by the synchronizing pistons and that the exhaust 2nd rocker arm does not move when pushed manually.
^ If the exhaust 2nd rocker arm does not move independently, go to step 6.
^ If the exhaust 2nd rocker arm moves independently, remove and disassemble the rocker arm assembly, and check that the synchronizing pistons between the exhaust 1st and 2nd rocker arms move smoothly. If any rocker arm or synchronizing piston needs replacing, replace the rocker arms for the cylinder as an assembly.
6. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.0 kgf/cm2, 47 psi).
7. Inspect the valve clearance.
8. Install the special tool (A) to the cam chain side inspection hole, then connect the air pressure regulator (B).
9. Loosen the valve on the regulator, and apply the specified air pressure.
Specified Air Pressure: 200 kPa (2.0 kgf/cm2, 28 psi)
10. Push on the intake 1st rocker arm (A) for the No. 1 cylinder, Make sure that the intake 1st rocker arm and the intake 3rd rocker arm (B) are mechanically connected by the synchronizing pistons and that the intake 3rd rocker arm does not move when pushed manually.
^ If the intake 3rd rocker arm does not move independently, go to step 11.
^ If the intake 3rd rocker arm moves independently, remove and disassemble the rocker arm assembly, and check that the synchronizing pistons between the intake 1st and 3rd rocker arms move smoothly. If any rocker arm or synchronizing piston needs replacing, replace the rocker arms for the cylinder as an assembly.
11. Tighten the valve on the regulator, then remove the special tools.
12. Install the special tool (A) to the transmission side inspection hole, then connect the air pressure regulator (B).
13. Move the intake 2nd rocker arm (A) and intake 3rd rocker arm (B) for the No. 1 cylinder. The intake 2nd and intake 3rd rocker arm should move independently of the intake 1st rocker arm (C).
^ If the intake 2nd and 3rd rocker arms move independently, go to step 14.
^ If the intake 2nd or intake 3rd rocker arm does not move independently, remove and disassemble the rocker arm assembly, and check that the synchronizing pistons between the intake 1st and 2nd rocker arms move or intake 1st and 3rd smoothly. If any rocker arm or synchronizing piston needs replacing, replace the rocker arms for the cylinder as an assembly.
14. Move the exhaust 2nd rocker arm (A) for the No. 1 cylinder. The exhaust 2nd rocker arm should move independently of the exhaust 1st rocker arm (B).
^ If the exhaust 2nd rocker arm moves independently, go to step 15.
^ If the exhaust 2nd rocker arm does not move independently, remove and disassemble the rocker arm assembly, and check that the synchronizing pistons between the exhaust 1st and 2nd rocker arms move smoothly. If any rocker arm or synchronizing piston needs replacing, replace the rocker arms for the cylinder as an assembly.
15. Tighten the valve on the regulator, then remove the special tools.
16. Repeat step 4 to 15 on the remaining cylinder's rocker arms with each piston at TDC. When all the rocker arms pass the test, go to step 17.
17. Install the cylinder head cover.