It is never pleasant to hear a sound you don’t know about, and which originates from your car. So, what if you find an exhaust noise that persists on your Audi A4? It is highly possible that this is a minor issue, however, before being sure, it is better to conduct some verifications. Our team has written this to support you solve it. First, we will look at the possible causes if you have a muffled exhaust sound on your Audi A4 and second, if you have a metallic rattling noise on your Audi A4.
Muffled exhaust noise Audi A4
Exhaust pipe with holes Audi A4
Having a muffled sound from its exhaust is not insignificant and can end in over-consumption, or a malfunction of the engine, which could finally become dirty, for example. If you have an exhaust noise on your Audi A4, it is possible that it is due to a crack in the exhaust pipe, this is the most common explanation. In order to verify this, situate 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 replaced.
Element dislocated exhaust pipe Audi A4
The other possibility of being the subject of a muffled exhaust noise on Audi A4 is to have a part of the exhaust unit that has dislocated resulting from vibrations for example. In fact some junctions of the different parts of the pot can loosen along with time and generate an exhaust gas leak in places not intended for this goal. These fumes will then make a loud noise. Same technique as above, we go under the Audi A4 to discover the issue area, and tighten or change the bolts. If you hear a muffled sound but after examining it doesn’t seem to come from the pot itself, think about taking a look at this content page which gives solutions gives solutions about rear end noises on Audi A4.
Metal rattling exhaust sound Audi A4
Damaged exhaust muffler noise Audi A4
If, on the other hand, you are subject to an exhaust sound that is more of a metallic type of, it is possible that one or more parts of your exhaust may be destroyed. Indeed, it is possible that either your baffles, the catalyst or the silencer are the reason of this noise. To make sure, go under your Audi A4, cold, and tap each of the previously stated parts with a hammer to discover the origin 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 swapping it, as well as the silencer. In this case, to stop the exhaust noise on your Audi A4, you will either have to find a resale one and do it yourself, or go to your technician.
Metal rattling exhaust noise Audi A4 : Silentblock, loose pot
Finally, a metallic exhaust noise on your Audi A4 may be linked to a poor attachment of your exhaust to your vehicle. In fact, over the years, vibrations, the pot fasteners on the vehicle chassis can come off. In this case, you need to check, 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, the more fixed it should be. Visually check 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 replaced.
