VTEC Rocker Arms
VTEC Rocker Arm TestSpecial Tools Required
^ VTEC Air Adapter 07VAJ-P8A010A
^ VTEC Air Stopper 07VAJ-P8A020A
1. '98-99 models: Remove the throttle body cover (A), ignition wire cover (B) and intake manifold covers (C).
'00-02 models: Remove the throttle body cover (A), intake manifold covers (B) and intake manifold cover stay (C).
2. Remove the Evaporative Emission (EVAP) canister hose (A) from the throttle body.
3. Remove the vacuum hose (B) and breather pipe (C), then remove the intake air duct (D).
4. Remove the throttle cable (A) and cruise control cable (B) by loosening the locknuts (C), then slip the cable ends out of the accelerator linkage. Take care not to bend the cables when removing them. Always replace any kinked cable with a new one.
5. Remove the brake booster vacuum hose (A), vacuum hoses (B) and Positive Crankcase Ventilation (PCV) hose (C).
6. Remove the vacuum hose (A) ('98-99 models), breather hose (B) and water bypass hoses (C).
7. Remove the intake manifold.
8. Remove the cylinder head covers.
9. Remove the front upper cover (see step 2).
10. Set the No. 1 piston at TDC (see step 10).
11. 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 12.
12. Repeat step 11 on the remaining intake mid rocker arms with each piston at TDC. When all the mid rocker arms pass the test, go to step 13.
13. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.0 kgf/cm2, 100 psi).
14. Inspect the valve clearance.
15. Cover the timing belt with a shop towel to protect the belt.
16. Remove the 2 intake rocker shaft mounting bolts, then connect the special tools and Valve Inspection an air pressure regulator with a 0 - 100 psi gauge (A) as shown.
17. Loosen the valve on the regulator and apply the specified air pressure.
Specified Air Pressure: 390 kPa (4.0 kgf/cm2, 57 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 by rotating the crankshaft clockwise.
18. 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.
19. Remove the tools.
20. Check for smooth operation of each lost motion assembly. Replace the lost motion assembly if it does not move smoothly.