Usually, the part that most get abused is the joint that allows the cat to move in relation to the exauhst tube under the car. It is not supposed to move as much as when a mount is broken.
Unless the engine or it's part could hit something, then it is not only wear.
To my experience, there are only two ways to have a bad engine mount:
- Some oil is reaching the mount and the rubber slowly disolves until the inner shaft is loose
- A manufacturing defect
The mounts are only a piece of rubber with an external and internal steel section. It is glue to both parts. Nothing can wear as it is not a moving part. The rubber is compressed with the forces.
Usually any other part will break (transmission, engine, driveshaft) before a mount.
If you look at the engine running at idle, and compare with a v8, you will see that a 3 cylinder does vibrate alot and stresses more the mount. This will eventually show if a manufacturing defect is present in a mount
By the way, I beleive that there are 3 engine mounts. But I am not sure
I looked at them on my car. They are Very big. There is No Way I would pay for them without having the original piece back. To inspect it in case they charge for nothing.
The Engine Mount is going to be replaced under warrenty
I do Drive the car hard, i make no claims to the contrary. But as Yves has mentioned, it is most likley a defect. Also the engine has been shaky for over a year and a half, I have had them look at it countless times but i always get "Nothing is wrong" i wonder if it was this all along