It is never pleasant to notice a sound you don’t know about, and which results from your car. Thus, what if you notice an exhaust noise that persists on your Peugeot 407? It is highly possible that this is a small issue, however, before being sure, it is better to operate some investigations. Our team has produced this to support you resolve it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Peugeot 407 and second, if you have a metallic rattling noise on your Peugeot 407.
Muffled exhaust noise Peugeot 407
Exhaust pipe with holes Peugeot 407
Having a muffled sound from its exhaust is not insignificant and can lead to over-consumption, or a malfunction of the car engine, which could finally become dirty, for example. If you have an exhaust noise on your Peugeot 407, it is possible that it is due to a crack in the exhaust pipe, this is the most classic cause. To be able to validate this, locate somebody under the running motor vehicle and accelerate to help them find the starting point of the hole. Once identified, if it is not too large you can cold seal it with specific metallic mastic type legs. Otherwise, the section will have to be swapped.
Element dislocated exhaust pipe Peugeot 407
The other possibility of being the subject of a muffled exhaust noise on Peugeot 407 is to have a part of the exhaust system that has dislocated resulting from vibrations for example. Indeed some junctions of the different parts of the pot can loosen along with time and cause an exhaust gas leak in places not intended for this purpose. These fumes will then generate a loud noise. Same technique as above, we go under the Peugeot 407 to discern the issue area, and tighten or change the bolts. If you hear a muffled sound but after verifying it doesn’t seem to come from the pot itself, think about having a look at this document which gives answers gives solutions about rear end noises on Peugeot 407.
Metal rattling exhaust sound Peugeot 407
Damaged exhaust muffler noise Peugeot 407
If, alternatively, you are subject to an exhaust sound that is more of a metallic sort of, it is possible that one or more parts of your exhaust may be weakened. Indeed, it is plausible that either your baffles, the catalyst or the silencer are the induce of this noise. To be sure, go under your Peugeot 407, cold, and tap each of the previously stated parts with a hammer to discern the source of the noise. You should move things between things in the problematic part, if they are baffles, you can try to push the section a little bit to try to block them and thus limit their movements. If it is a dead catalyst, it will be necessary to consider changing it, as well as the silencer. In this case, to stop the exhaust noise on your Peugeot 407, you will either have to find a second hand one and do it yourself, or go to your auto mechanic.
Metal rattling exhaust noise Peugeot 407 : Silentblock, loose pot
Finally, a metallic exhaust noise on your Peugeot 407 may be linked to a poor attachment of your exhaust to your vehicle. Indeed, over time, vibrations, the pot fasteners on the vehicle chassis can come off. In this case, you need to examine, when cold, that the pot holds well, to try to get it to move in different directions and watch how it reacts. Backwards there should be some play and be able to move but not too much. The closer you get to the engine motor, the more fixed it should be. Visually examine the fasteners for which you have doubts. Finally, it is possible that a silentbloc may have died . In this case it will have to be swapped.
