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The Pontiac Bonneville Engine Mount secures the powerful sedan motor and reduces vibration that results in a smooth ride. Pontiac made the Bonneville a flagship that combined spacious comfort, aggressive style, and a series of enthusiastic V8 and subsequent supercharged V6 engines that gave quick acceleration yet still achieved reasonable fuel economy. Over the decades of manufacturing, the car developed electronic suspension tuning, agility of front-wheel drive, and strong four and five-speed automatics, allowing owners to handle the car with a lot of confidence during their day-to-day commuting as well as during their long highway journeys. The Pontiac was very popular with families who needed luxury but did not have to spend a lot of money, and the trunk was quite spacious. High-grade interior trim and a reputation for reliability made the Pontiac Bonneville a favorite among families who did not need to spend a lot of money but still desired luxury in a car. Pontiac engineers kept perfecting the chassis stiffness to augment the quiet ride. One of the main components of that longevity is a special Bonneville Engine Mount, a rubber or hydraulic isolator that attaches the engine to the subframe, dampens vibration under load, and maintains the angles of the part to be accurate, ensuring that hoses and wiring are not strained and keeping the cabin quiet. Even the modern versions of the Engine Mount have a way of correcting the stiffness to match the rpm to maintain performance and comfort. To change the Engine Mount, park, take off the battery, prop the engine with a jack and a block of wood, unbolt the old unit, raise the engine a little, install the new part, torque bolts, lower the engine, and connect everything up again, and make sure the engine idles smoothly.