Free Guide to Replacing Motor Mounts Yourself

Understanding Motor Mounts and Why They Wear Out

Motor mounts are rubber and metal components that attach your engine to the vehicle's frame. They serve one critical job: absorbing vibrations from the engine while keeping it securely in place. Most vehicles have between three and four motor mounts, depending on the engine size and vehicle type. The larger the engine, the more mounts typically needed to handle the vibration and weight.

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These mounts contain rubber material because rubber naturally dampens vibration. Over time, the rubber degrades from constant exposure to heat, engine oil, and the repeated flexing that occurs every time your engine runs. The average lifespan of motor mounts ranges from 5 to 10 years, though some may last longer depending on driving habits and climate. Vehicles driven primarily on highways with smooth acceleration tend to have longer-lasting mounts than those subjected to aggressive driving or frequent stop-and-go traffic.

Common warning signs that motor mounts are failing include excessive vibration felt in the steering wheel or throughout the cabin, clunking sounds when shifting between Drive and Reverse, and visible engine movement when looking under the hood while someone revs the engine. Some drivers notice the engine sits lower on one side of the engine bay when the vehicle is parked. A worn mount can also cause the engine to move excessively during acceleration, which can damage surrounding components like hoses, belts, and electrical connections.

Environmental factors play a significant role in mount deterioration. Cold climates cause rubber to become brittle and crack more easily, while hot climates accelerate the breakdown of rubber compounds. Salt exposure from winter roads can corrode the metal parts of the mounts, weakening their structural integrity. Regular inspections become more important in harsh climates.

Practical takeaway: Before starting any replacement work, confirm that motor mounts are actually the problem. Have someone rev the engine while you observe from outside the vehicle and the engine bay. Excessive movement of more than half an inch suggests worn mounts. Take photos or videos to document the movement, which helps when ordering replacement parts and provides a reference point for comparison after repairs.

Preparing Your Workspace and Gathering Tools

Replacing motor mounts requires a safe, well-organized workspace and the correct tools. Attempting this repair in a parking lot or on soft ground creates safety hazards. You need a level, stable surface with room to work underneath and around the engine. A driveway or garage floor works well, though concrete must be strong enough to support a vehicle on jack stands. Never rely solely on a jack to keep the vehicle elevated—jack stands are mandatory for safety.

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Essential tools include a socket set (typically 8mm through 18mm for most vehicles), wrenches, a jack rated for your vehicle's weight, jack stands rated for at least your vehicle's weight, and socket extensions. You'll also need a breaker bar for stubborn bolts, as motor mount bolts are often very tight. A torque wrench becomes important when reinstalling mounts, as bolts must be tightened to specific specifications. Under-tightening leaves the engine unstable, while over-tightening can crack the rubber component or strip bolt threads.

Additional items that make the job easier include: jack pads (rubber or wood blocks that protect the vehicle's frame from jack damage), flashlights or work lights for visibility under the vehicle, penetrating oil like WD-40 to help loosen corroded bolts, wire or rope to safely support the engine while you work, rags and shop towels, safety glasses, work gloves, and a creeper or mat to lie on while working underneath.

Before beginning work, gather your vehicle's service manual or look up the exact location and specification of motor mounts for your specific year, make, and model. Motor mount configurations vary significantly between vehicles. Some mounts are accessible from the top of the engine bay, while others require removal of components like the radiator support, air filter housing, or wheel wells. Knowing the layout beforehand prevents wasted time and frustration.

Safety equipment matters more than convenience. Wear closed-toe shoes with good grip to prevent slipping. Keep a first aid kit nearby. Have a phone accessible in case you need emergency assistance. Never work alone if possible—having someone to help support the engine or call for help if needed significantly reduces risk. Ensure adequate ventilation if you're working in an enclosed garage, as engine oil fumes can accumulate.

Practical takeaway: Create a clean, organized area next to your workspace where you can place bolts, fasteners, and components in the order you remove them. Use a magnetic parts tray or compartmented container to prevent losing hardware. Take photos of each stage with your phone as you work—these photos serve as reassembly guides and prove invaluable when you're reinstalling components and can't remember the exact arrangement.

Safely Supporting the Engine During Replacement

This step separates successful motor mount replacement from dangerous disasters. The engine is the heaviest single component on your vehicle, weighing 200 to 500 pounds depending on the engine type. When you remove motor mounts, you're removing the devices that hold this weight in place. The engine must be properly supported before any mount is completely removed.

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The standard method involves using an engine hoist—a three-legged frame with a hydraulic jack that lifts the engine from above using chains or straps attached to the engine's lifting eyes. Rental shops typically stock engine hoists for $20 to $50 per day. If the engine has no lifting eyes, you can create temporary attachment points using engine eye bolts screwed into threaded holes in the block. Never attempt to support the engine by the oil pan, water pump, or other components not designed for load-bearing.

Alternatively, some mechanics support the engine using a hydraulic floor jack placed under the engine pan with a wooden block placed between the jack head and pan. This method requires extreme caution—the engine can slip off the jack if not properly balanced. A second support using a jack stand or additional jack on the opposite side provides backup support. Never trust a single point of contact when supporting an engine.

The process involves: raising the vehicle on jack stands placed under the frame (never under doors, rocker panels, or other thin metal), positioning your engine support device (hoist or jacks) under the engine's center of gravity, gradually raising the support until it carries some of the engine's weight (you'll feel the load transfer), and then lowering the original motor mounts to relieve their stress. This approach allows you to remove and inspect worn mounts while the engine remains safely supported.

Before beginning work, test your engine support system by slowly raising the engine just an inch or two and observing that the support holds steady without slipping. Listen for creaking or popping sounds that indicate components shifting. Feel the support to ensure no part is hot from friction. If anything seems unstable, lower the engine and reassess before proceeding. This test takes five minutes and prevents catastrophic failure during actual work.

Once the engine is properly supported, you can safely remove motor mount bolts one at a time without risk. Remove and replace one mount completely before moving to the next. This staged approach means the engine is never completely unsupported. After installing each new mount and tightening its bolts to specification, gradually lower the engine onto that mount and verify it carries load before proceeding to the next mount.

Practical takeaway: Write down the torque specifications for each motor mount bolt before beginning work. Motor mounts typically torque to between 40 and 70 foot-pounds (540-950 newton-meters), but specifications vary significantly. After tightening each bolt, wait ten minutes, then re-torque it. This procedure, called a "settling torque," compensates for rubber compression. Skipping this step can result in loose mounts after a few days of driving.

Removing Old Motor Mounts Step-by-Step

Before removing any bolts, disconnect the negative battery terminal. This prevents accidental electrical shorts, especially important if you need to move or adjust engine harnesses during work. Set the parking brake and place wheel chocks behind the rear wheels to prevent vehicle movement. Position the vehicle so you have clear access to the motor mount you're replacing—sometimes this means parking at an angle or in a specific spot.

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Locate the motor mount bolts using your service manual or online guides specific to your vehicle. Most motor mounts are held by two or three bolts—some connecting the mount to the engine block and others connecting the mount to the frame or subframe. Take high-resolution photos before disturbing anything. These photos prevent confusion when reinstalling, especially if multiple mounting points sur