It is never pleasant to discover a sound you don’t know about, and which originates from your car. So, what if you find an exhaust noise that is persistant on your Renault Laguna 3? It is highly possible that this is a small problem, however, before being sure, it is better to execute some investigations. Our team has produced this to help you fix it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Renault Laguna 3 and second, if you have a metallic rattling noise on your Renault Laguna 3.
Muffled exhaust noise Renault Laguna 3
Exhaust pipe with holes Renault Laguna 3
Having a muffled sound from its exhaust is not insignificant and can end up in over-consumption, or a malfunction of the engine unit, which could eventually become dirty, for example. If you have an exhaust noise on your Renault Laguna 3, it is possible that it is due to a hole in the exhaust pipe, this is the most regular cause. In order to validate this, locate somebody 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 swapped.
Element dislocated exhaust pipe Renault Laguna 3
The other possibility of being the subject of a muffled exhaust noise on Renault Laguna 3 is to have a part of the exhaust system that has dislocated as a consequence of vibrations for example. Indeed some junctions of the different parts of the pot can loosen after some time and cause an exhaust gas leak in places not intended for this purpose. These fumes will then produce a loud noise. Same technique as above, we go under the Renault Laguna 3 to discern the problem region, 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 having a look at this content which gives answers gives solutions about rear end noises on Renault Laguna 3.
Metal rattling exhaust sound Renault Laguna 3
Damaged exhaust muffler noise Renault Laguna 3
If, alternatively, 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 induce of this noise. To confirm, go under your Renault Laguna 3, cold, and tap each of the previously stated parts with a hammer to discern 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 changing it, as well as the silencer. In this case, to stop the exhaust noise on your Renault Laguna 3, you will either have to find a second hand one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise Renault Laguna 3 : Silentblock, loose pot
Finally, a metallic exhaust noise on your Renault Laguna 3 may be related to a poor attachment of your exhaust to your car. Indeed, over the years, 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 motor, 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.
