What is the reason for increased vibration after replacing new engine mounts?
2 Answers
The reason for increased vibration after replacing new engine mounts is that the engine mount cushions were not replaced simultaneously. There are three engine mount cushions in total. If only one is replaced, it disrupts the original vibration damping balance, which can cause the vehicle to vibrate more. Alternatively, the mount cushions may be unsuitable. Some vehicle models require specialized mount cushions, and if the cushions are not suitable, they cannot provide effective vibration damping, naturally resulting in more vibration. The functions of engine mounts are: 1. During engine operation, certain vibrations are generated. The rubber components in the engine mounts can eliminate the resonance produced by the engine; 2. The hydraulic oil in the engine mounts has a vibration damping function.
I had the engine mount replaced before, but the car vibrated even worse afterwards. So annoying. Thinking back, it was probably because the new mount wasn’t installed properly—maybe the bolts weren’t tightened enough or it was misaligned, letting the engine vibrations transfer directly into the cabin. Also, if the new mount is too stiff or made of subpar material, it might not absorb vibrations effectively and could even perform worse than the old one. Later, a friend pointed out that the old mount residue wasn’t cleaned properly during installation, causing uneven contact. Plus, other components like the driveshaft also had aging issues that weren’t checked at the same time. I’d suggest going back to the repair shop ASAP and having them recheck the installation. If necessary, switch back to OEM parts. During regular maintenance, inspect the engine mounts for wear early on—small issues like these can add up and amplify vibrations. For safety, avoid long-distance drives until it’s fixed.
