It is rarely pleasant to discover 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 Lexus GS? It is highly probable that this is a minimal issue, however, before being sure, it is better to carry out some verifications. Our team has made this to support you resolve it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Lexus GS and second, if you have a metallic rattling noise on your Lexus GS.
Muffled exhaust noise Lexus GS
Exhaust pipe with holes Lexus GS
Having a muffled sound from its exhaust is not insignificant and can cause over-consumption, or a malfunction of the engine, which could after a while become dirty, for example. If you have an exhaust noise on your Lexus GS, it is possible that it is due to a crack in the exhaust pipe, this is the most typical explanation. In order to validate this, locate a friend or relative under the running motor car and accelerate to help them discover the source 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 swapped.
Element dislocated exhaust pipe Lexus GS
The other possibility of being subjected to a muffled exhaust noise on Lexus GS 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 after some time and cause 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 Lexus GS to define the issue place, and tighten or replace the bolts. If you hear a muffled sound but after verifying it doesn’t seem to come from the pot itself, think about taking a look at this content page which gives answers gives solutions about rear end noises on Lexus GS.
Metal rattling exhaust sound Lexus GS
Damaged exhaust muffler noise Lexus GS
If, alternatively, you are subject to an exhaust sound that is more of a metallic type, it is possible that one or more parts of your exhaust may be damaged. Indeed, it is conceivable that either your baffles, the catalyst or the silencer are the induce of this noise. To be sure, go under your Lexus GS, cold, and tap each of the previously stated parts with a hammer to define 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 swapping it, as well as the silencer. In this case, to stop the exhaust noise on your Lexus GS, you will either have to find a resale one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise Lexus GS : Silentblock, loose pot
Finally, a metallic exhaust noise on your Lexus GS may be linked to a poor attachment of your exhaust to your car. Indeed, over time, vibrations, the pot fasteners on the car 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 behaves. 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 swapped.
