It is rarely pleasing to hear a sound you don’t know about, and which comes from your car. So, what if you spot an exhaust noise that remains on your Volvo Xc40? It is highly possible that this is a minor issue, however, before being sure, it is better to carry out some checks. Our team has created this to help you fix it. First, we will look at the possible causes if you have a muffled exhaust sound on your Volvo Xc40 and second, if you have a metallic rattling noise on your Volvo Xc40.
Muffled exhaust noise Volvo Xc40
Exhaust pipe with holes Volvo Xc40
Having a muffled sound from its exhaust is not insignificant and can end up in over-consumption, or a malfunction of the car engine, which could in the end become dirty, for example. If you have an exhaust noise on your Volvo Xc40, it is plausible that it is due to a hole in the exhaust pipe, this is the most common explanation. In order to validate this, position a friend or relative under the running motor vehicle and accelerate to help them determine the starting point 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 replaced.
Element dislocated exhaust pipe Volvo Xc40
The other possibility of being subjected to a muffled exhaust noise on Volvo Xc40 is to have a part of the exhaust unit that has dislocated caused by vibrations for example. Indeed some junctions of the different parts of the pot can loosen along with time and induce 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 Volvo Xc40 to discern the issue location, and tighten or swap the bolts. If you hear a muffled sound but after verifying it doesn’t seem to come from the pot itself, consider taking a look at this article which gives solutions gives solutions about rear end noises on Volvo Xc40.
Metal rattling exhaust sound Volvo Xc40
Damaged exhaust muffler noise Volvo Xc40
If, alternatively, 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 destroyed. Indeed, it is conceivable that either your baffles, the catalyst or the silencer are the reason of this noise. To confirm, go under your Volvo Xc40, cold, and tap each of the previously stated parts with a hammer to discern 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 changing it, as well as the silencer. In this case, to stop the exhaust noise on your Volvo Xc40, you will either have to find a resale one and do it yourself, or go to your auto mechanic.
Metal rattling exhaust noise Volvo Xc40 : Silentblock, loose pot
Finally, a metallic exhaust noise on your Volvo Xc40 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 responds. 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 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 replaced.
