It is never pleasant to listen to 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 Opel Astra? It is highly probable that this is a minimal trouble, however, before being sure, it is better to carry out some inspections. Our team has produced this to support you fix it. First, we will look at the possible causes if you have a muffled exhaust sound on your Opel Astra and second, if you have a metallic rattling noise on your Opel Astra.
Muffled exhaust noise Opel Astra
Exhaust pipe with holes Opel Astra
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 Opel Astra, it is possible that it is due to a crack in the exhaust pipe, this is the most usual reason. To be able to validate this, locate somebody under the running motor automobile and accelerate to help them identify the starting point 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 replaced.
Element dislocated exhaust pipe Opel Astra
The other possibility of being suffering from a muffled exhaust noise on Opel Astra 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 a while and cause an exhaust gas leak in places not intended for this goal. These fumes will then create a loud noise. Same technique as above, we go under the Opel Astra to discern the trouble location, and tighten or change 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 content page which gives answers gives solutions about rear end noises on Opel Astra.
Metal rattling exhaust sound Opel Astra
Damaged exhaust muffler noise Opel Astra
If, alternatively, you are exposed to an exhaust sound that is more of a metallic sort of, it is possible that one or more parts of your exhaust may be weakened. Indeed, it is plausible that either your baffles, the catalyst or the silencer are the reason of this noise. To make sure, go under your Opel Astra, 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 Opel Astra, you will either have to find a resale one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise Opel Astra : Silentblock, loose pot
Finally, a metallic exhaust noise on your Opel Astra may be in connection with a poor attachment of your exhaust to your automobile. Indeed, after some time, vibrations, the pot fasteners on the automobile chassis can come off. In this case, you need to verify, 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 verify 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.
