It is never pleasant to find out 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 Buick LaCrosse? It is highly probable that this is a small problem, however, before being sure, it is better to operate some inspections. Our team has written this to support you solve it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Buick LaCrosse and second, if you have a metallic rattling noise on your Buick LaCrosse.
Muffled exhaust noise Buick LaCrosse
Exhaust pipe with holes Buick LaCrosse
Having a muffled sound from its exhaust is not insignificant and can lead to over-consumption, or a malfunction of the engine, which could finally become dirty, for example. If you have an exhaust noise on your Buick LaCrosse, it is possible that it is due to a hole in the exhaust pipe, this is the most usual reason. To be able to validate this, situate someone under the running motor car and accelerate to help them recognize the source of the hole. Once located, 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 Buick LaCrosse
The other possibility of being the subject of a muffled exhaust noise on Buick LaCrosse is to have a part of the exhaust device that has dislocated because of vibrations for example. Indeed some junctions of the different parts of the pot can loosen 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 Buick LaCrosse to identify the problem place, and tighten or swap the bolts. If you hear a muffled sound but after examining it doesn’t seem to come from the pot itself, consider looking at this content which gives answers gives solutions about rear end noises on Buick LaCrosse.
Metal rattling exhaust sound Buick LaCrosse
Damaged exhaust muffler noise Buick LaCrosse
If, alternatively, 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 damaged. Indeed, it is possible that either your baffles, the catalyst or the silencer are the induce of this noise. To make sure, go under your Buick LaCrosse, 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 out of date catalyst, it will be necessary to consider replacing it, as well as the silencer. In this case, to stop the exhaust noise on your Buick LaCrosse, you will either have to find a second hand one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise Buick LaCrosse : Silentblock, loose pot
Finally, a metallic exhaust noise on your Buick LaCrosse may be connected to a poor attachment of your exhaust to your car. Indeed, after some time, 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 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 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.
