A. Replace Right and Left Front Exhaust Catalyst Assemblies

1. Raise the vehicle on a suitable hoist.

2. Disconnect the electrical harness connector from the left downstream oxygen sensor.

3. Remove the right downstream oxygen sensor connector from the transmission support crossmember.

4. Disconnect the electrical harness connector from the right downstream oxygen sensor.

5. Remove both the left and right downstream oxygen sensors from the exhaust catalyst assemblies using special tool C-4907.





6. Remove the brace (if so equipped) at the rear of front exhaust catalyst assemblies (Figure 1).





7. Loosen the two clamps holding the right and left front exhaust catalyst assemblies to the "Y" collector pipe (Figure 2).

8. Remove the front and rear resonator isolator hanger bolts.

9. Separate the remaining rubber isolator hangers from the exhaust system (Figure 1).

10. Support the muffler and tailpipe assembly with a suitable jack.

11. Separate the exhaust system at the "Y" connector from the right and left exhaust catalyst assemblies (Figure 2).

12. Remove the left exhaust catalyst assembly heat shield and nuts at the exhaust manifold ball flange

13. Remove left exhaust catalyst assembly to exhaust manifold flange nuts.

14. Remove the right exhaust catalyst assembly to exhaust manifold flange nuts.

15. Remove both right and left exhaust catalyst assemblies from the vehicle.

16. Position the new left front exhaust assembly to the exhaust manifold and tighten the flange nuts to 106 in. lbs. (12 N.m).

17. Position the new right front exhaust assembly to the exhaust manifold and tighten the ball flange nuts to 106 in. lbs. (12 N.m).

18. Connect the right and left exhaust catalyst assemblies to the "Y" collector pipe (Figure 2).

19. Install the exhaust system rubber isolator onto the hangers.

20. Install the front and rear resonator isolator hanger bolts. Tighten the bolts to 215 in. lbs. (25 N.m).

21. Align the exhaust system so that the clearance between:

a. Exhaust system and the fuel tank is a minimum of 5/8 in. (16 mm).

b. Exhaust pipe and the tunnel reinforcement brace clearance is between 5/8" to 3/4" (16 mm to 20 mm).

22. Tighten the two band clamps at the "Y" collector pipe to 36 ft. lbs. (50 N.m).

23. Tighten the nuts to both the right and left front exhaust assembly ball flange joints to 25 ft. lbs. (34 N.m).

24. Install the right front exhaust pipe heat shield nuts at the exhaust manifold ball flange. Tighten the bolts to 98 in. lbs. (10 N.m).

25. Install the front exhaust pipe brace (if so equipped). Tighten the two bolts to 40 ft. lbs. (55 N.m).

26. Install both left and right downstream oxygen sensors and tighten to 30 ft. lbs. (40 N.m).

27. Connect the right electrical harness connector from the right downstream oxygen sensor.

28. Attach the right downstream oxygen sensor connector to the transmission support crossmember.

29. Connect the left electrical harness connector to the left downstream oxygen sensor.

30. Lower the vehicle. Continue to Section B Reprogram the PCM.