It is rarely pleasing to discover a sound you don’t know about, and which will arrive from your car. So, what if you identify an exhaust noise that is persistant on your Nissan Altima? It is highly possible that this is a minor issue, however, before being sure, it is better to operate some investigations. Our team has made this to help you fix it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Nissan Altima and second, if you have a metallic rattling noise on your Nissan Altima.exhaust-noise-nissan-altima

Muffled exhaust noise Nissan Altima

Exhaust pipe with holes Nissan Altima

Having a muffled sound from its exhaust is not insignificant and can end up in over-consumption, or a malfunction of the engine, which could in the end become dirty, for example. If you have an exhaust noise on your Nissan Altima, it is plausible that it is due to a crack in the exhaust pipe, this is the most usual reason. To be able to confirm this, position a friend or relative under the running motor vehicle and accelerate to help them find the origin of the hole. Once determined, if it is not too large you can cold seal it with specific metallic mastic type legs. Otherwise, the section will have to be changed.

Element dislocated exhaust pipe Nissan Altima

The other possibility of being suffering from a muffled exhaust noise on Nissan Altima is to have a part of the exhaust device 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 Nissan Altima to identify the issue area, and tighten or swap 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 content which gives answers gives solutions about rear end noises on Nissan Altima.

Metal rattling exhaust sound Nissan Altima

Damaged exhaust muffler noise Nissan Altima

If, on the other hand, you are subject to an exhaust sound that is more of a metallic sort of, it is plausible 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 Nissan Altima, cold, and tap each of the previously stated parts with a hammer to identify 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 out of date catalyst, it will be necessary to consider changing it, as well as the silencer. In this case, to stop the exhaust noise on your Nissan Altima, you will either have to find a resale one and do it yourself, or go to your mechanic.

Metal rattling exhaust noise Nissan Altima : Silentblock, loose pot

Finally, a metallic exhaust noise on your Nissan Altima may be linked to a poor attachment of your exhaust to your vehicle. Indeed, as time passes, 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 changed.