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Lower Engine Mount Replacement
 
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Pelican Technical Article:

Lower Engine Mount Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$200

Talent:

***

Tools:

Set of sockets, (16, 18mm), pry bar, block of wood, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

R56 MINI Cooper Hatchback (2007-11)
R56 MINI Cooper S Hatchback (2007-11)

Parts Required:

Engine mount and fasteners

Hot Tip:

Replace fasteners

Performance Gain:

Reduce engine vibration

Complementary Modification:

Install performance-improving mount

The engine in your MINI has to be secured to the chassis in order to provide maximum power transfer. MINI achieves this by using a hydraulic motor and transmission mount (liquid filled). These mounts have hollow chambers inside that are filled with fluid that helps to create a stiff engine mount while maintaining the highest level of vibration dampening. The engine is also secured to the lower subframe using a rubber mount. This mount connects to a bracket on the engine crankcase and bolts to the sub frame.

When an engine mount begins to fail, you will feel more vibrations from the engine. The engine may sag in the engine bay or the engine may have excessive movement under torque if a mount is broken. When working under your vehicle, you may notice fluid leaking out of your engine mount(s). This means the mount has failed and should be replaced. If you don't see a leak, inspect the lower engine mount for cracks or tears. When the lower engine mount fails, the engine may vibrate at idle and move excessively back and forth when accelerating / decelerating.

In this article, I'll go over the steps involved with replacing the lower engine mount on the MINI R56 with a Turbocharged 4-cylinder engine. Other engines are similar.

There are lower engine mount polyurethane supports and polyurethane mounts available. Installing these mounts will stiffen the engine with a little increase in vibration.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The engine in your MINI has to be secured to the chassis in order to provide maximum power transfer.
Figure 1

The engine in your MINI has to be secured to the chassis in order to provide maximum power transfer. MINI achieves this by using a hydraulic motor and transmission mount (liquid filled). These mounts have hollow chambers inside that are filled with fluid that helps to create a stiff engine mount while maintaining the highest level of vibration dampening. The engine is also secured to the lower sub frame using a rubber mount. This mount (red arrow) connects to a bracket on the engine crankcase and bolts to the subframe (green arrow). Inspect the lower engine mount (yellow arrows) for cracks or tears. When the lower engine mount fails, the engine may vibrate at idle and move excessively back and forth when accelerating / decelerating.

Start by loosening the 16mm front mount fastener (red arrow).
Figure 2

Start by loosening the 16mm front mount fastener (red arrow).

Next, remove the 18mm rear mount fastener (red arrow).
Figure 3

Next, remove the 18mm rear mount fastener (red arrow).

Pull the mount down away from the sub frame; allow it to hang by the remaining front fastener.
Figure 4

Pull the mount down away from the sub frame; allow it to hang by the remaining front fastener.

Place a small wood block between a pry bar and the engine (green arrow).
Figure 5

Place a small wood block between a pry bar and the engine (green arrow). Then push the engine toward the front of the vehicle. Hold it forward while pulling the front fastener out (red arrow). This helps to clear the front exhaust pipe. Have a friend nearby to pull the bolt out if necessary.

Then remove the engine mount from the bracket.
Figure 6

Then remove the engine mount from the bracket. Reverse the removal steps to install the new mount.

There are lower engine mount polyurethane supports and polyurethane mounts available.
Figure 7

There are lower engine mount polyurethane supports and polyurethane mounts available. Installing these mounts will stiffen the engine with a little increase in vibration. This photo shows a factory lower engine mount with polyurethane supports installed (red arrows). This keeps the vibration dampening of the OE mount while adding a stiffer support to the engine.


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