It is never pleasing to find out a sound you don’t know about, and which originates from your car. So, what if you notice an exhaust noise that persists on your Chevrolet HHR? It is highly possible that this is a minimal issue, however, before being sure, it is better to accomplish some investigations. Our team has created this to support you solve it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Chevrolet HHR and second, if you have a metallic rattling noise on your Chevrolet HHR.
Muffled exhaust noise Chevrolet HHR
Exhaust pipe with holes Chevrolet HHR
Having a muffled sound from its exhaust is not insignificant and can end in over-consumption, or a malfunction of the car engine, which could in time become dirty, for example. If you have an exhaust noise on your Chevrolet HHR, it is possible that it is due to a hole in the exhaust pipe, this is the most regular explanation. In order to confirm this, position somebody under the running motor car and accelerate to help them discover 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 swapped.
Element dislocated exhaust pipe Chevrolet HHR
The other possibility of being the subject of a muffled exhaust noise on Chevrolet HHR 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 generate a loud noise. Same technique as above, we go under the Chevrolet HHR to discern the issue region, 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, consider looking at this article which gives answers gives solutions about rear end noises on Chevrolet HHR.
Metal rattling exhaust sound Chevrolet HHR
Damaged exhaust muffler noise Chevrolet HHR
If, alternatively, you are subject 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 conceivable that either your baffles, the catalyst or the silencer are the reason of this noise. To confirm, go under your Chevrolet HHR, 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 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 Chevrolet HHR, you will either have to find a used one and do it yourself, or go to your auto technician.
Metal rattling exhaust noise Chevrolet HHR : Silentblock, loose pot
Finally, a metallic exhaust noise on your Chevrolet HHR may be related 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 reacts. 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 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.
