To replace an engine mount, support the engine, remove the old mount, install the new one, and tighten the hardware to the manufacturer's specifications. The exact procedure varies by vehicle, but the engine must remain properly supported throughout the job.
Engine mounts do more than hold the engine in place. They control engine movement and help isolate vibration from the vehicle's body. A worn mount can cause noticeable shaking, clunking, or excessive engine movement.
This guide explains how to replace an engine mount safely, how to inspect a failed mount, what tools you need, and what to check after installation.
What Is an Engine Mount?
An engine mount connects the engine to the vehicle's chassis, frame, or subframe.
Most mounts combine metal brackets with rubber or another vibration-damping material. Some vehicles use hydraulic mounts filled with fluid. Newer vehicles may also use electronically controlled or active engine mounts.
The mounting system can include several engine and transmission mounts. Each one controls movement in a different direction.
A failed engine mount can therefore affect more than engine vibration. Excessive movement can place additional stress on exhaust components, hoses, wiring, drivetrain parts, and other mounts.
Signs of a Bad Engine Mount
A damaged engine mount does not always produce the same symptoms. The signs depend on the type of mount and where it has failed.
Look for these common symptoms:
- Excessive vibration while the engine is idling
- Clunking when accelerating
- A thud when shifting from Park to Drive or Reverse
- Excessive engine movement
- Vibration that changes with engine load
- Cracked or separated rubber
- Fluid leaking from a hydraulic mount
- Engine movement that looks greater than normal
- Unusual movement when the vehicle accelerates or decelerates
These symptoms can also come from drivetrain, suspension, exhaust, or engine problems. A visual inspection helps narrow down the cause.
Engine Mount vs. Transmission Mount
Engine mounts and transmission mounts perform similar jobs, but they support different components.
An engine mount secures part of the engine to the vehicle.
A transmission mount supports the transmission and helps control drivetrain movement.
Some vehicles use a combined mounting arrangement. Others use separate mounts around the engine and transmission.
If you feel a strong clunk during gear changes, inspect both the engine and transmission mounts instead of assuming the engine mount is the only problem.
How Many Engine Mounts Does a Car Have?
There is no universal number.
Many vehicles use several mounting points to control the engine and transmission assembly. The exact arrangement depends on the engine, transmission, drivetrain layout, and vehicle design.
Front-wheel-drive vehicles often use a combination of engine, transmission, and torque mounts. Rear-wheel-drive vehicles can use a different arrangement.
Check the repair information for your specific vehicle before ordering a replacement.
Tools Needed to Replace an Engine Mount
The tools depend on the vehicle, but a typical replacement may require:
| Tool or item | Purpose |
|---|---|
| Replacement engine mount | Replaces the failed component |
| Floor jack | Supports the engine when required |
| Jack stands | Safely support the vehicle |
| Wood block | Spreads the jack load where approved |
| Socket set | Removes mounting hardware |
| Ratchet | General fastener removal |
| Breaker bar | Helps loosen tight bolts |
| Torque wrench | Applies the specified tightening torque |
| Penetrating oil | Helps with corroded hardware |
| Vehicle service information | Provides correct procedures and specifications |
Some vehicles require extensions, swivel sockets, specialty tools, or additional support equipment.
Safety Before Starting
An engine mount carries part of the engine's weight. Removing it without supporting the engine can allow the engine to shift or drop.
Never work under a vehicle supported only by a floor jack.
Before starting:
- Park on a level, solid surface.
- Apply the parking brake.
- Turn the engine off.
- Allow hot components to cool.
- Use the vehicle's approved lifting points.
- Install properly rated jack stands.
- Identify the correct engine support point.
- Support the engine before removing the mount.
The service manual should determine where the engine can safely be supported.
Do not place a jack directly against a thin oil pan or another component that can bend or crack.
How to Replace an Engine Mount
The following procedure is a general guide. Always follow the factory procedure for your particular vehicle.
1. Confirm Which Mount Has Failed
Start with an inspection rather than immediately removing parts.
Look at the engine mounts for:
- Torn rubber
- Cracks
- Separation between rubber and metal
- Hydraulic fluid leakage
- Bent brackets
- Damaged mounting hardware
- Abnormal engine movement
Inspect the other mounts at the same time.
A damaged mount does not automatically mean every mount needs replacement.
2. Check for Other Possible Causes
Engine vibration can have several causes.
Before replacing a mount, consider whether the symptoms could come from:
- Engine misfires
- Worn suspension bushings
- Exhaust components touching the body
- Damaged transmission mounts
- Drivetrain problems
- Loose brackets
- Damaged pulleys or accessories
Replacing a mount will not fix an unrelated vibration problem.
3. Prepare the Vehicle
Remove any components blocking access to the mount.
Depending on the vehicle, this may include an air intake, battery tray, splash shield, engine cover, bracket, or other component.
Take photographs before removing complicated parts. This gives you a reference during reassembly.
4. Support the Engine
Position the floor jack at the manufacturer-approved support location.
If the procedure allows support from underneath, use an appropriate wood block to distribute the load.
Raise the jack slowly until it supports the engine.
Do not lift the engine higher than necessary.
The goal is to hold the engine securely while the mount is removed.
5. Remove the Mounting Hardware
Locate all bolts and nuts securing the mount.
Loosen the hardware while the engine remains supported.
Some bolts may be difficult to remove because of corrosion or limited access. Penetrating oil can help with heavily corroded hardware.
Do not remove the final fastener until you have confirmed that the engine is securely supported.
6. Remove the Old Mount
Once the mounting hardware is removed, carefully take out the old mount.
You may need to make small height adjustments with the jack to release pressure from the mounting points.
Do not force the engine sideways or use nearby components as leverage points.
Once removed, compare the old mount with the replacement.
Check the:
- Mounting holes
- Bracket shape
- Rubber position
- Mount orientation
- Overall dimensions
They should match the application.
7. Install the Replacement Mount
Position the new mount in the correct orientation.
Start every mounting bolt by hand.
Do not immediately tighten one bolt completely. Leaving the hardware slightly loose allows the mount to align correctly.
If the holes do not line up, make small adjustments to the engine position with the support jack.
Never force a bolt through a misaligned mounting hole.
8. Torque the Mount Correctly
This is one of the most important parts of the installation.
Engine mount bolts have vehicle-specific torque specifications. Some applications also use different torque values for different fasteners.
Use the manufacturer's service information for the exact specification.
Do not copy a generic torque value from another vehicle.
Some vehicles also use torque-to-yield or single-use fasteners. Replace these when the manufacturer specifies replacement.
9. Reinstall Removed Components
Reinstall every component removed for access.
Check all:
- Electrical connectors
- Wiring
- Hoses
- Brackets
- Covers
- Intake components
- Shields
Make sure nothing is trapped between the mount and its mounting surface.
Also check that wiring and hoses have adequate clearance from moving or hot components.
10. Lower the Engine Onto the New Mount
After all mount hardware has been correctly secured, slowly lower the support jack.
Watch the mount as the engine's weight transfers onto it.
The engine should settle into its normal position without unusual movement or contact with nearby components.
11. Inspect the Installation
Before starting the engine, perform a final inspection.
Confirm that:
- All mounting hardware is installed.
- Fasteners are tightened correctly.
- The mount is properly seated.
- Wiring is clear.
- Hoses are clear.
- No tools remain in the engine compartment.
- Nothing is contacting the engine or mount incorrectly.
12. Start the Engine
Start the engine and let it idle.
Listen for unusual knocking, clunking, or contact noises.
Watch for abnormal vibration.
Do not put your hands near belts, pulleys, cooling fans, or other moving components.
If you need to observe engine movement under load, follow a safe inspection procedure and keep clear of moving parts.
13. Take a Test Drive
Take a short and controlled test drive after the repair.
Pay attention when:
- Starting from a stop
- Accelerating
- Braking
- Shifting between gears
- Reversing
- Idling after the drive
A properly installed mount should reduce the symptoms caused by the failed mount.
If the original vibration remains, inspect the other mounts and related components.
How to Inspect an Engine Mount
A visual inspection can reveal many mount failures.
Check the Rubber
Look for cracks, tears, hardening, or separation.
Minor surface aging does not always mean the mount has failed. Look for damage that affects the mount's ability to control engine movement.
Check for Fluid
Hydraulic engine mounts can leak when damaged.
If you see fluid around a hydraulic mount, confirm whether it is coming from the mount or from another engine component.
Check the Bracket
Look for bent, cracked, or damaged metal.
A damaged bracket can prevent the new mount from sitting correctly.
Check Engine Movement
Excessive movement can indicate a failed mount, but movement alone does not identify which mount has failed.
The complete mounting system should be inspected.
Example Engine Mount Inspection Record
The following is an illustrative example only, not a measurement from a real vehicle.
| Inspection item | Example finding | Action |
|---|---|---|
| Rubber mount | Visible separation | Replace mount |
| Mount bracket | No visible damage | Reuse if specifications allow |
| Hydraulic mount | Fluid leakage present | Replace mount |
| Other mounts | Surface wear only | Monitor and inspect |
| Mounting bolts | No visible damage | Verify against service procedure |
| Engine movement | Excessive during load change | Inspect mounting system |
For an actual repair record, document the vehicle, mileage, failed component, observed condition, replacement part, torque specifications, and post-repair result.
This provides much stronger evidence than simply stating that the mount was replaced.
How Long Does Engine Mount Replacement Take?
Replacement time varies significantly between vehicles.
An easily accessible mount may require relatively little labor. A mount located beneath other components can take considerably longer.
Factors include:
- Engine layout
- Mount location
- Access to mounting bolts
- Corrosion
- Number of components that must be removed
- Type of mount
- Required support procedure
Always check the service information for the specific vehicle before estimating the job.
How Much Does It Cost to Replace an Engine Mount?
Engine mount replacement costs vary across the United States.
The final price depends on the vehicle, mount type, labor time, part quality, and local labor rates.
DIY replacement can reduce labor costs if you already have the necessary equipment.
Professional replacement costs more, but it may be worthwhile when access is difficult or special support equipment is required.
Do not choose a mount based only on the lowest price. Confirm that the part matches the vehicle's exact application.
Should You Replace All Engine Mounts?
Not automatically.
Inspect the remaining mounts before deciding.
Replacing multiple mounts can make sense when several have significant wear or when several mounts have similar deterioration.
However, replacing a healthy mount simply because another mount failed is not always necessary.
Follow the manufacturer's recommendations and the condition of the complete mounting system.
Can You Drive With a Bad Engine Mount?
It is best to repair a severely damaged engine mount before continuing to drive normally.
A failed mount can allow excessive engine movement. That movement can place additional stress on other components.
In severe cases, engine movement can affect:
- Exhaust components
- Wiring
- Coolant hoses
- Intake components
- Transmission mounts
- Drivetrain components
If the engine is moving excessively or you hear heavy clunking, have the vehicle inspected before driving it further.
Common Engine Mount Replacement Mistakes
Removing the Mount Without Supporting the Engine
The engine can shift when the mount is removed.
Using the Wrong Replacement Mount
A similar-looking mount may not have the correct dimensions or mounting configuration.
Guessing the Torque
Mounting hardware should be tightened to the vehicle-specific specification.
Installing the Mount Backward
Some mounts have a specific orientation. Compare the old and new parts and follow the service information.
Ignoring Other Mounts
Inspect the entire mounting system instead of focusing only on the failed component.
Forgetting Removed Connectors or Hoses
A forgotten connector or incorrectly routed hose can create a new problem after the repair.
Assuming Every Vibration Comes From the Mount
Misfires, exhaust contact, suspension bushings, and drivetrain problems can produce similar symptoms.
When Should a Professional Replace the Engine Mount?
Professional repair is the safer option when:
- You cannot safely support the engine.
- You do not have proper jack stands.
- The mount is difficult to access.
- The vehicle requires extensive component removal.
- The mounting hardware is severely corroded.
- The vehicle uses active engine mounts.
- Special tools are required.
- You cannot access the correct factory specifications.
Engine mounting systems support a heavy and moving assembly. Safe support matters more than saving labor costs.
Engine Mount Replacement Checklist
| Step | What to check |
|---|---|
| Diagnose | Confirm the mount is actually damaged |
| Inspect | Check all engine and transmission mounts |
| Prepare | Secure the vehicle and gather tools |
| Support | Properly support the engine |
| Remove | Remove the old mount carefully |
| Compare | Verify the replacement mount |
| Install | Position the new mount correctly |
| Torque | Follow vehicle-specific specifications |
| Reassemble | Reinstall removed components |
| Inspect | Check hoses, wiring, and clearances |
| Test | Start the engine and check vibration |
| Drive | Perform a controlled road test |
Frequently Asked Questions
How do I know if my engine mount needs replacing?
Look for excessive vibration, clunking, visible rubber damage, hydraulic fluid leakage, or excessive engine movement. Confirm the cause with a complete inspection.
Can I replace an engine mount myself?
Yes, many engine mounts can be replaced by an experienced DIY mechanic. The key requirement is safely supporting the engine and following the correct vehicle-specific procedure.
Do I need a torque wrench?
A torque wrench is strongly recommended. Engine mount fasteners should be tightened according to the manufacturer's specifications.
Should I replace the transmission mount too?
Not necessarily. Inspect the transmission mount and replace it only if it is damaged or the service procedure calls for replacement.
Why is my car still vibrating after replacing the engine mount?
The vibration may have another cause. Check the remaining mounts, engine operation, exhaust clearance, drivetrain, and suspension components.
How long does a new engine mount last?
There is no universal lifespan. Mount life depends on the vehicle, mount design, driving conditions, heat exposure, fluid contamination, and overall use.
Are hydraulic engine mounts different?
Yes. Hydraulic mounts use fluid to help control vibration and movement. Fluid leakage can indicate mount failure.
Do newer cars use active engine mounts?
Some newer vehicles use electronically controlled or active mounts. These systems can require additional diagnostic or service procedures.
Conclusion
Replacing an engine mount requires proper engine support, correct installation, and manufacturer-specified torque. Inspect the other mounts and test the vehicle after replacement to confirm the repair fixed the problem.