Rocker Arm Assembly: Testing and Inspection
MANUAL INSPECTION1. Remove the rear engine compartment cover.
2. Remove the wire harness clamps from the strut brace, then remove the strut brace.
3. Remove the Evaporative Emission (EVAP) control canister hose, breather hose and vacuum hose, then remove the intake air duct.
4. Remove the throttle body cover.
5. Remove the throttle cable and cruise control cable by loosening the locknuts, then slip the cable ends out of the throttle linkage.
6. Remove the brake booster vacuum hose, vacuum hoses and Positive Crankcase Ventilation (PCV) hose.
7. Remove the vacuum hose, breather hose and water bypass hoses.
8. Remove the intake manifold.
9. Remove the cylinder head covers.
10. Remove the front upper cover.
11. Set the No. 1 piston at TDC.
12. Push the intake mid rocker arm on the No. 1 cylinder manually.
13. Check that the intake mid rocker arm moves independently of the primary and secondary intake rocker arms.
14. Check the intake mid rocker arm of each cylinder at TDC.
- 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.
INSPECTION USING SPECIAL TOOLS
CAUTION:
- Before using the Valve Inspection Tool, make sure that the air pressure gauge on the air compressor indicates over 690 kPa (100 psi).
- Inspect the valve clearance before rocker-arm inspection.
- Cover the timing belt with a shop towel to protect the belt.
- Check the intake primary rocker arm of each cylinder at TDC.
1. Remove the rear engine compartment cover.
2. Remove the wire harness clamps from the strut - brace, then remove the strut brace.
3. Remove the Evaporative Emission (EVAP) control canister hose, breather hose and vacuum hose, then remove the intake air duct.
4. Remove the throttle body cover.
5. Remove the throttle cable and cruise control cable by loosening the locknuts, then slip the cable ends out of the throttle linkage.
6. Remove the brake booster vacuum hose, vacuum hoses and Positive Crankcase Ventilation (PCV) hose.
7. Remove the vacuum hose, breather hose and water bypass hoses.
8. Remove the intake manifold.
9. Remove the cylinder head covers.
10. Remove the front upper cover.
11. Set the No. 1 piston at TDC.
12. Remove the two intake rocker shaft mounting bolts, then connect the special tools and Valve Inspection Tool.
13. Loosen the regulator valve on the valve inspection tool and apply the specified air pressure to the rocker arm synchronizing pistons A/B.
Specified Air Pressure: 390 kPa (57 psi)
NOTE: If the synchronizing piston A and B do not fit in place after applying air pressure, move the primary or secondary rocker arm up and down manually.
14. 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.
15. Remove the tools.
16. 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.
17. After inspection, check that the MIL does not come on.