Recommendations for replacing the exhaust system (Fiesta 4)

Welding work must not be carried out on metal of exhaust system parts weakened by rust. The result of repairing a rusted exhaust pipe will not stand the test of time. Use mastic to seal cracks or install bandages as a temporary measure for repairs on the road. As practice shows, a pipe damaged by rust breaks near the repaired place. It rarely happens that both mufflers burn out at the same time. But there is no guarantee that a muffler that is currently in good working order will not fail in the near future. In order not to perform the same work at short intervals, it is recommended to replace the central and rear mufflers at the same time. To determine the extent of damage, it is necessary to thoroughly check both mufflers, even if they look quite normal from the outside, and then decide whether to replace individual elements or the entire system as a whole.



SEQUENCE OF WORKS

1. Raise the vehicle and secure it on supports. During all work on the exhaust system, the vehicle must be securely secured and must not tip over even if individual parts are jerked sharply.

2. If the threaded connections do not come off when removing the mufflers, simply break off the bolt heads. When installing, use new bolts, snap rings, nuts and gaskets.



3. For safety, replace the rubber supports.

4. Push-in pipe connections are easiest to separate when heated. At the service station, a welding torch is used for this, but a jet of hot air can also be used. When doing this, be sure to wear goggles and keep a fire extinguisher handy. In cases where it is not possible to heat the parts to be separated, use rust solvents.

5. The pipes inserted into each other are separated using strong twisting movements or hammer blows.

6. If this does not help, the connection of the faulty muffler is cut off with a saw at a distance of 10 cm behind the connection point. The remains of the pipe are cut lengthwise with a saw and removed with a large screwdriver.

7. Threaded connections of the exhaust system are easier to separate if a layer of copper grease is applied to their threads during installation.