Engine stay "dog bone" mount
Hi folks... The factory mount is not very strong as the design is inherently weak. I have seen these mounts fail in near new cars with less than 20,000km. I have overcome the problem by redesigning the bush and replacing it with my own purpose made rubber bush. Note this is not an application for a urethane bush as the mounting needs to articulate and is under a torsional load even in the 'dead' position. The duro of the redesigned, stronger rubber bush is critical to be able to deal with this torsional side load without transferring unwanted stresses to other components. I can only make these bushes in one of lots at the moment as I reuse the original shell and ferrule. Larger quantities can be made but as I am not a parts retailer I don't have a shop front to sell them from.
On the O.E. mount you will find that it is the front bush (top of engine) that fails and that the rear bush last a lot longer. Having said that they are both the same and both suffer the same inherent design weakness. The engine bush is the one that cops the hammering which is why it tears at the base of the void. If you are using the o.e. style bush you should factor on it failing frequently. Replace them both at the same time as the rear mount will also be showing signs of wear.