Exhaust System: Service and Repair

WM 260119 Removing and installing exhaust system on DFI engines

Technical values





Preliminary work

1. Remove tailpipes. => 263419 Removing and installing tailpipes on DFI engines - section on "Removing"

Information

Component overview





V8 S exhaust system





Removing exhaust system

WARNING

Danger of burns from hot exhaust system.

-> Only remove the exhaust system when it has cooled down.
-> Wear protective gloves.

Information

- Before the rear silencer is released, the exhaust system must be supported with a transmission jack or held by another person.

WARNING

Danger of injury from heavy exhaust system.

-> Before loosening the exhaust system, it should be secured to prevent it from falling.

1. Secure the exhaust system under the vehicle using a jack.





Exhaust system secured with transmission jack

2. Loosen connecting clamps between the catalytic converters and the exhaust system -2-. Then slide the clamps sideways onto the exhaust system. The exhaust clamps must not be reused.





V8 S exhaust system

3. Loosen the front and middle holders -1 and 3-. To do this, loosen the two fastening screws.
4. Unscrew the fastening screws at the left and right on the rear silencer -1 -.





Rear silencer mounting

5. Remove exhaust system. => Figure shows exhaust system on transmission jack





Figure shows exhaust system on transmission jack
V8 naturally aspirated engine sports exhaust system (valve exhaust system) =>
WARNING

Danger of injury from heavy exhaust system.

-> Before loosening the exhaust system, it should be secured to prevent it from falling.

6. Secure the exhaust system under the vehicle using a jack.





Exhaust system secured with transmission jack

7. Disconnect control line at the transfer point between the body and exhaust system (near the rear axle). -1 and 5-





Control line and rear silencer





8. Loosen connecting clamps between the catalytic converters and the exhaust system -2-. Then slide the clamps sideways onto the exhaust system. The exhaust clamps must not be reused.





V8 S sports exhaust system





9. Loosen the front and middle holders -1 and 3-. To do this, loosen the two fastening screws.
10. Unscrew the fastening screws at the left and right on the rear silencer -1-.





Rear silencer mounting

11. Remove exhaust system. => Figure shows exhaust system on transmission jack





Figure shows exhaust system on transmission jack

Installing exhaust system

1. Slide new exhaust clamps onto the exhaust pipes. The threaded joint must be pointing downwards.
2. Position the exhaust system under the vehicle using a transmission jack. Do not install too tightly.





Figure shows exhaust system on transmission jack

3. Fit and tighten the fastening screws for the rear silencer -4-. => Tightening torque: 23 Nm (17 ftlb.)





V8 S exhaust system

4. Tighten the holders for the exhaust system -2 and 3-. => Tightening torque: 23 Nm (17 ftlb.)
5. Move new exhaust clamps into installation position and fit them. The threaded joint must be pointing downwards. Adjust to maximum inclination and ensure the assembly length is the same on both exhaust pipes. => Installation position of exhaust clamp => Adjustment value: 10° => Tightening torque: 23 Nm (17 ftlb.)





Installation position of exhaust clamp





V8 naturally aspirated engine sports exhaust system (valve exhaust system) =>
6. Slide new exhaust clamps onto the exhaust pipes. The threaded joint must be pointing downwards.
7. Position the exhaust system under the vehicle using a transmission jack. Do not install too tightly.





Figure shows exhaust system on transmission jack

8. Fit and tighten the fastening screws for the rear silencer -4-. To do this, fit the two fastening screws. => Tightening torque: 23 Nm (17 ftlb.)





V8 S sports exhaust system

9. Tighten the holders for the exhaust system -2 and 3-. => Tightening torque: 23 Nm (17 ftlb.)
10. Move new exhaust clamps into installation position and fit them. The threaded joint must be pointing downwards. Adjust to maximum inclination and ensure the assembly length is the same on both exhaust pipes. => Installation position of exhaust clamp => Adjustment value: 10° => Tightening torque: 23 Nm (17 ftlb.)





Installation position of exhaust clamp





11. Fit control line at the transfer point between the body and exhaust system (near the rear axle). -2 and 5-





Control line and rear silencer

Subsequent work

1. Install tailpipes. => 263419 Removing and installing tailpipes on DFI engines - section on "Installing"