Engine motor mounts are often ignored, as they are hidden in the engine bay and are not routinely inspected. However, when mounts become a problem, they usually need replacing. Assessing mount damage begins with inspecting the rubber for extensive wear. Rubber will sometimes wear from the brackets. When this happens the engine will shift and strip fasteners. Some cars have hydraulic mounts that often need replacing. Bad hydraulic mounts will leak, causing grease and dirt buildup around them.
Before existing mounts are removed, the engine must be supported and secured. This is done by hoisting the engine with a trolley jack to hold it in place to during repair. The hood and parts in the way of mount access are removed and set aside.
Engine mounts are removed by first removing the through bolts. This allows the access to the mount, fastener and bracket, which are removed and discarded. New mounts are replaced by attaching and torquing the brackets. After the mount unit is positioned, fasteners and fastener bolts are installed. The through bolt goes in last and is torqued to specifications recommended by the manufacturer. When the new mounts are secured, parts removed for access are replaced and the engine is lowered. Mounts are usually allowed to settle for several minutes while they begin to bear the weight of the motor.
