VTEC Rocker Arm
- Remove cylinder head covers. See CYLINDER HEAD COVER under REMOVAL & INSTALLATION.
- Remove front upper cover. See Figure.
- Set the No. 1 piston at top dead center (TDC). See step 3 in VALVE CLEARANCE ADJUSTMENT.
- 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). See Fig 1.
- 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.
- Repeat step 4 on the remaining intake mid rocker arms with each piston at TDC. When all the mid rocker arms pass the test, then go to next step.
- Check that the air pressure on the shop air compressor gauge indicates over 100 PSI (690 kPa).
- Inspect the valve clearance. See VALVE CLEARANCE under ADJUSTMENTS.
- Cover the timing belt with a shop towel to protect the belt.
- Remove the 2 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). See Fig 2.
- Loosen the valve on the regulator, and apply air pressure of 64-78 PSI (440-540 kPa).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.
- Make sure that the intake primary rocker arm (B) and intake secondary rocker arm (C) are mechanically connected by the piston and that the mid rocker arm (A) does not move when pushed manually. See Fig 1. If any intake mid rocker arm moves independently of the primary and secondary rocker arms, replace the rocker arms as a set.