BMR Motor Mount Kit Polyurethane Bushings

G0Fast

Junior Member
Joined
Jun 8, 2025
Posts
6
Reaction score
5
Location
Manassas, VA
Here are some tips when installing the BMR Motor Mount Kit with Polyurethane Bushings on a 2012 Mustang GT 5.0L.
1. The stock motor mounts are hard to remove due to the length of the center bolt. I ended up cutting the center bolt flush with the mount with a Dremel in order the get the clearance to remove them.
2. Before raising engine, loosen the two nuts on the transmission cross member. They should be very loose, just hanging on by a few threads. This allows the engine to pivot upwards without straining the bell housing or damaging the transmission mount.
3. If you raise the engine by jacking under the oil pan, use a large floor jack and a 2x4 to spread the load on the pan. Better yet use an engine hoist to raise the engine. Jacking under the oil pan may damage it.
4. To ensure the bolt on the new mount doesn’t fall out when you install it, duct tape it to the bottom of the mount before installing it. Then put the bolt through the engine bracket and hand tighten the washer and nylock nut.
5. There is a large opening underneath the engine mount which you can easily lose sockets or bolts in if you are not careful. Just realize it’s there and don’t drop anything in that area.
6. Some Youtube videos show the engine bracket being loosened in order to remove the stock engine mount. Those brackets are impossible to remove. There is a nut on the passenger side behind the AC compressor which is also a ground. I was unable to remove it. On the driver’s side there is a nut behind the steering shaft that is unaccessible.
7. To remove the stock mounts after you have all the bolts removed, use a long pry bar under the engine bracket to get the last bit of clearance, then remove the stock mount with your free hand.
8. Disconnect the battery ground before working since you will be working around the starter which has a direct connection to the battery.

Those are my tips. Good luck, this is a difficult job even for an experienced mechanic.
 

skwerl

tree hugger
Joined
Aug 6, 2011
Posts
16,333
Reaction score
1,313
Location
central Florida
I just swapped in the entire BMR K member with their engine mounts included. Easier than swapping motor mounts on the factory K member IMO. I used an engine hoist to support the engine then dropped the K member and bolted up the new one. That gave me all kinds of working room underneath.
 

G0Fast

Junior Member
Joined
Jun 8, 2025
Posts
6
Reaction score
5
Location
Manassas, VA
The K member swap takes some weight off the front end as well which is a good thing. I would agree that if you have the time, money, and ability, do the K member swap w/poly engine mounts at the same time. That’s pretty much a bolt-off/bolt-on deal.
 

Support us!

Support Us - Become A Supporting Member Today!

Click Here For Details

Back
Top