It is rarely pleasant to find out a sound you don’t know about, and which comes from your car. Thus, what if you identify an exhaust noise that persists on your BMW 5 Series? It is highly probable that this is a small trouble, however, before being sure, it is better to accomplish some investigations. Our team has produced this to support you fix it. First, we will look at the possible causes if you have a muffled exhaust sound on your BMW 5 Series and second, if you have a metallic rattling noise on your BMW 5 Series.
Muffled exhaust noise BMW 5 Series
Exhaust pipe with holes BMW 5 Series
Having a muffled sound from its exhaust is not insignificant and can lead to over-consumption, or a malfunction of the engine unit, which could in time become dirty, for example. If you have an exhaust noise on your BMW 5 Series, it is possible that it is due to a hole in the exhaust pipe, this is the most common explanation. In order to verify this, situate a friend or relative under the running motor vehicle and accelerate to help them find the source of the hole. Once discovered, 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 BMW 5 Series
The other possibility of being the subject of a muffled exhaust noise on BMW 5 Series is to have a part of the exhaust unit that has dislocated because of vibrations for example. In fact some junctions of the different parts of the pot can loosen over time and generate an exhaust gas leak in places not intended for this purpose. These fumes will then make a loud noise. Same technique as above, we go under the BMW 5 Series to discover the trouble area, and tighten or change the bolts. If you hear a muffled sound but after checking it doesn’t seem to come from the pot itself, consider taking a look at this document which gives solutions gives solutions about rear end noises on BMW 5 Series.
Metal rattling exhaust sound BMW 5 Series
Damaged exhaust muffler noise BMW 5 Series
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 weakened. Indeed, it is plausible that either your baffles, the catalyst or the silencer are the induce of this noise. To make sure, go under your BMW 5 Series, cold, and tap each of the previously stated parts with a hammer to discover 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 swapping it, as well as the silencer. In this case, to stop the exhaust noise on your BMW 5 Series, you will either have to find a used one and do it yourself, or go to your auto mechanic.
Metal rattling exhaust noise BMW 5 Series : Silentblock, loose pot
Finally, a metallic exhaust noise on your BMW 5 Series may be related to a poor attachment of your exhaust to your vehicle. In fact, over time, 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 behaves. 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 swapped.
