It is never pleasant to discover a sound you don’t know about, and which originates from your car. So, what if you detect an exhaust noise that is persistant on your Bmw Serie 3 E90? It is highly probable that this is a minimal trouble, however, before being sure, it is better to operate some verifications. Our team has made this to support you fix it. First, we will look at the possible causes if you have a muffled exhaust sound on your Bmw Serie 3 E90 and second, if you have a metallic rattling noise on your Bmw Serie 3 E90.
Muffled exhaust noise Bmw Serie 3 E90
Exhaust pipe with holes Bmw Serie 3 E90
Having a muffled sound from its exhaust is not insignificant and can cause over-consumption, or a malfunction of the car engine, which could in time become dirty, for example. If you have an exhaust noise on your Bmw Serie 3 E90, it is possible that it is due to a crack in the exhaust pipe, this is the most classic explanation. In order to validate this, position a friend or relative under the running motor car and accelerate to help them identify the source of the hole. Once found, 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 Bmw Serie 3 E90
The other possibility of being suffering from a muffled exhaust noise on Bmw Serie 3 E90 is to have a part of the exhaust system that has dislocated due to vibrations for example. Indeed some junctions of the different parts of the pot can loosen after a while and generate an exhaust gas leak in places not intended for this goal. These fumes will then generate a loud noise. Same technique as above, we go under the Bmw Serie 3 E90 to identify the trouble region, and tighten or replace the bolts. If you hear a muffled sound but after examining 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 Serie 3 E90.
Metal rattling exhaust sound Bmw Serie 3 E90
Damaged exhaust muffler noise Bmw Serie 3 E90
If, on the other hand, you are exposed 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 broken. Indeed, it is possible that either your baffles, the catalyst or the silencer are the cause of this noise. To be sure, go under your Bmw Serie 3 E90, cold, and tap each of the previously stated parts with a hammer to identify 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 changing it, as well as the silencer. In this case, to stop the exhaust noise on your Bmw Serie 3 E90, you will either have to find a used one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise Bmw Serie 3 E90 : Silentblock, loose pot
Finally, a metallic exhaust noise on your Bmw Serie 3 E90 may be in connection with a poor attachment of your exhaust to your car. Indeed, as time passes, vibrations, the pot fasteners on the car 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 behaves. Backwards there should be some play and be able to move but not too much. The closer you get to the engine unit, 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 replaced.
