Is replacing motor mounts a big job?
Yes — replacing motor mounts can be a big job on many vehicles, though the difficulty varies widely by model and engine layout. For some cars it’s a straightforward job with clear access; for others it’s a multi-hour, more involved repair that may require engine support and extra disassembly.
Motor mounts secure the engine to the car’s frame and dampen vibration. Over time they wear, crack, or separate, which can cause excessive vibration, noise, or engine movement under acceleration. The overall challenge hinges on how many mounts your car has, where they sit, and what surrounding components must be moved or removed to reach them. The days of a quick “swap a bolt and go” are behind many modern vehicles, especially those with transverse engines and tightly packed engine bays.
Why it can be a big job
Understanding what makes the job easy or difficult helps set expectations for time, cost, and effort. The following factors commonly drive the level of complexity.
- Access and clearance: Some mounts are tucked behind exhaust pipes, radiator fans, or under a subframe, which can require removing shields, hoses, or connectors to reach.
- Engine and transmission layout: Transverse engines in front-wheel-drive cars often have mounts that are harder to access than those in older, simpler designs; additional mounts or crossmembers can complicate the job.
- Number and type of mounts: Cars may have two, three, or more mounts, including hydraulic or variable-damping designs. Hydraulic mounts can require careful handling to avoid fluid leaks or misalignment.
- Engine support requirements: Replacing mounts may require temporarily lifting or supporting the engine to relieve stress on the mounts, which adds risk and equipment needs.
- Interconnected components: Bolts, brackets, fuel lines, wiring harnesses, and the exhaust system may need to be loosened or moved, increasing the chance of damage if not done properly.
In practice, some vehicles allow a relatively quick swap with basic hand tools, while others demand more extensive disassembly and alignment checks. That variability is why labor times can range from a couple of hours to a full day.
The replacement process: what happens on a typical day
The steps below outline a typical sequence used by professional shops. The exact order can vary by car and technician preference.
Access and preparation
Before touching the engine, the technician ensures the vehicle is safely elevated, with the battery disconnected and all relevant systems secured. Tools and a clean workspace are prepared, and any shields or components that block access to the mounts are identified.
- Raise and support the vehicle securely on jack stands, and position a drain pan if needed.
- Loosen and remove components that block access to the mounts (such as shields, intake ducts, or sometimes part of the exhaust).
- Inspect surrounding parts for wear or damage that could be revealed once the mounts are freed.
Replacing the mounts often requires careful engine support or temporary mounting aids to keep the engine from dropping when the old mounts are removed.
Mount removal and installation
With access established, the actual mounting work begins. It involves removing old mounts, inspecting mounting points, and installing new units with proper torque specs and alignment.
- Support the engine with a jack or engine support device to relieve burden on the mounts.
- Unbolt and remove the old motor mounts, noting exact positions and hardware for reuse or replacement.
- Clean mounting surfaces and install the new mounts, ensuring correct orientation and alignment.
- Torque all fasteners to the manufacturer’s specifications and recheck alignment as needed.
The job concludes with reassembly of any components that were removed, a final check of clearances, and a careful test run to verify that vibrations and noises are addressed.
DIY vs professional service
Pros and cons vary depending on your mechanical skill, tools, and workspace. Here’s how to weigh the decision.
- DIY considerations: If you have a well-equipped garage, a reliable engine support tool, a torque wrench, and a safe space to work, replacing a motor mount can be a feasible weekend project for certain vehicles. Expect to invest time for the first attempt and to follow the specific service manual instructions for torque specs and sequences.
- Professional considerations: Shops bring expertise in engine support, proper torque, alignment, and diagnostics. They can often complete the job more quickly, provide a warranty on parts and labor, and handle any unexpected complications that arise during disassembly.
For many drivers, opting for a professional service is the safer and more predictable route, especially for cars with complex layouts or limited workspace.
Costs and time estimates
Cost and duration depend on vehicle design, location, and whether one or more mounts are replaced. The following ranges are common in many markets today.
- Parts: Motor mounts can range from about $20 to $400 per mount, depending on vehicle and mount type (hydraulic vs. solid, OEM vs. aftermarket).
- Labor: Shops typically bill by the hour; expect roughly 1.5–4 hours per mount for non-complicated setups, with two mounts often taking 3–8 hours total depending on access and ancillary work.
- Typical total: Replacing a single mount frequently costs around $200–$500 (parts plus labor), while replacing two mounts can range from about $350–$1,000 or more, plus any ancillary parts if needed.
Because prices vary widely by region and model, it’s wise to obtain a written estimate that outlines parts, labor, and any additional charges before work begins.
Symptoms and diagnosis: when to consider replacement
Not all vibration or noise means the mounts are doomed. It's helpful to differentiate symptoms and know when to replace.
- Symptoms: Increased engine vibration at idle, clunking or banging when accelerating or decelerating, visible movement of the engine during revs, or failed inspection of mounts.
- Diagnostics: A mechanic can perform a visual check, perform a “shake” test with the engine running, and listen for mount-specific noise to determine if replacement is necessary.
If you notice persistent or worsening symptoms, have a professional inspect the mounts to prevent potential damage to other drivetrain components.
Summary
Motor mount replacement is a common but variable repair. For some vehicles it’s a straightforward swap; for others, it’s a substantial job requiring engine support and careful disassembly. Expect a range in cost and time based on engine layout, the number of mounts, and access to the mounting points. Whether you DIY or hire a pro, accurate torque specifications and proper reassembly are essential to restore smooth operation and avoid new vibrations.
Final takeaway: if you own a newer or tightly packed car, plan for a bigger job and get a detailed estimate from a qualified shop; for older or simpler layouts, a skilled DIYer might manage with the right tools and guidance.
