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Pelican Technical Article:

Engine Mount Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$200

Talent:

**

Tools:

Set of sockets, (16mm), hydraulic jack, block of wood

Applicable Models:

BMW 323Ci Coupe/Conv (1999-00)
BMW 323i Sedan/Wagon (1999-00)
BMW 325Ci Coupe/Conv (2001-06)
BMW 325i/xi Sedan/Wagon (2001-06)
BMW 328Ci Coupe (1999-00)
BMW 328i Sedan (1999-00)
BMW 330Ci Coupe/Conv (2001-06)
BMW 330i/xi Sedan (2001-06)

Parts Required:

Motor mounts and fasteners

Hot Tip:

Replace in pairs

Performance Gain:

Reduce engine vibration

Complementary Modification:

Replace your lower control arms

The E46 drive train (engine and transmission) is supported by a system of mounts. In front, the engine rests on two engine mounts, one on each side of the engine. At the rear, the transmission rests on a pair of mounts, which are bolted to a support crossbeam underneath the vehicle.

In general, there are a number of ways to determine if an engine mount is beginning to fail. For one thing, you will feel more vibrations coming 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 also notice fluid leaking out of your engine mount. If your vehicle shows these symptoms, it is very likely that the mount has failed and should be replaced as soon as possible. When replacing your mounts, always replace them in pairs; if one mount is bad chances are the other will be going bad very soon as well. Save yourself from the headache and replace both engine mounts at the same time. You will have to replace one side at a time, while supporting the engine from below. 

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 are 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. Do not work on your vehicle if you feel the task is beyond your ability. 

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. 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.

In this article, I will go over the steps involved in replacing the E46 engine mounts on the BMW M52 and M54 engine. First, you will need to remove the engine splash shields and/or reinforcement plate. See our Pelican Parts technical article on Removing the Splash Shield and Plate Reinforcement.

Note: The following steps highlight how to remove upper engine mount nuts. Warning: Only remove the side you are currently replacing. Do one side at a time.

While working in the engine bay, locate the top of your motor mount.
Figure 1

While working in the engine bay, locate the top of your motor mount. The left side engine mount is shown in this photo with the air filter housing removed. Remove the nut from the motor mount (green arrow).

While working in the engine bay, locate the top of the motor mount.
Figure 2

While working in the engine bay, locate the top of the motor mount. The right side engine mount is shown in this photo, looking down past the exhaust manifold. Remove the nut from the motor mount (green arrow).

Next, support the engine from below using a hydraulic jack.
Figure 3

Next, support the engine from below using a hydraulic jack. Place a block of wood between corner of the engine oil pan and the jack pad.

While working from below the engine at the subframe, remove the lower engine mount nut (green arrow).
Figure 4

While working from below the engine at the subframe, remove the lower engine mount nut (green arrow). Tip: If you have one bad engine mount and one good mount remove the bad mount first

Next, loosen the engine mount nut on opposite side of engine mount you are replacing, do not remove nut (green arrow).
Figure 5

Next, loosen the engine mount nut on opposite side of engine mount you are replacing, do not remove nut (green arrow). Doing this allows the engine to be raised enough to remove the engine mount on the opposite side of the engine.

Jack the engine until the engine mount can be removed from the vehicle.
Figure 6

Jack the engine until the engine mount can be removed from the vehicle. You will see the upper engine mount stud move free of the upper bracket (green arrow). Remove the engine mount from the vehicle.

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Comments and Suggestions:
Justind Comments: Why have a DIY Nick, if you aren't going to supply all of the information required, and then follow up by telling someone who used your DIY to go get a manual? Either do it right, or don't bother doing it. Another general comment about pelican DIYs, please just put full size pictures in the middle of the text so I can read and look at pics at the same time rather then having to go back and forth.
April 2, 2017
  Followup from the Pelican Staff: Thanks for the criticism, it's things like this that help us improve! I usually right click the pic, then open in a new window so I can see both at the same time. - Casey at Pelican Parts  
Dck8267 Comments: Is there a second part to this diy? Like about reinstalling them and torque soecs?
March 12, 2017
  Followup from the Pelican Staff: Installing is reverse removing.

I don’t have torque information.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
Andrey Comments: I just replaced the mounts but the fan now hitting the shroud. Looks like the engine is sitting about 1 inch higher now than before. Please help.
December 14, 2016
  Followup from the Pelican Staff: You may have installed the wrong mounts. Or the mounts are not installed correctly. Check the alignment tabs on the mounts, be sure they are fully seated. - Nick at Pelican Parts  
Greg Comments: Great info. Can this procedure also be performed using an engine support from above rather than a jack under the oil pan?
October 20, 2016
  Followup from the Pelican Staff: Yes it can. - Nick at Pelican Parts  
Keith Comments: My engine mounts on BMW e46 330d is oil filled so if I replace them how does the oil fill and where does the oil come from
March 2, 2016
  Followup from the Pelican Staff: When manufactured, they are filled with a hydraulic fluid. - Nick at Pelican Parts  
Todd Comments: Aloha Nick, what is torque spec. for 2006 BMW cheap motor mount boltspart # 22 11 0 392 551? Due to the bolts not being metal I do not want to over torque them. Thank you.
May 26, 2015
  Followup from the Pelican Staff: Where do the fasteners go? I can see if I have the info. Are they for the bracket to the crankcase? - Nick at Pelican Parts  
Steve Comments: Thanks for the great instructions! just completed the engine mount replacement in two hours 15 minutes! Had to losen the fan shroud to allow enough upward movement and no problems. Thanks again for this forum of information.
December 3, 2014
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 
Donnie Comments: OR does the bottom nut on the driver side need to be loosened as the prior instructions said?
Sorry for two posts
May 12, 2014
  Followup from the Pelican Staff: I would leave the bottom loose until you replace both. This way you get enough movement out of the engine. - Nick at Pelican Parts  
Donnie Comments: So once the driver's side mount has been installed, torque the top and bottom nuts and jack up again to install passenger side mount?
May 12, 2014
  Followup from the Pelican Staff: I would leave the bottom loose until you replace both. This way you get enough movement out of the engine. - Nick at Pelican Parts  
CHi town Mike Comments: Just bot my Bentley repair manual. I have a 325xi. Page 110-8 states Engine Mount to subframe 45Nm 33ft-lb
May 5, 2014
  Followup from the Pelican Staff: Thanks for the input on this one. We appreciate the help.
- Nick at Pelican Parts
 
Chris Comments: Just replaced the engine mounts on my 2000 BMW 323i. Thanks for the helpful DIY info. What torque setting should I tighten the the nuts on the mount? Thanks
April 15, 2014
  Followup from the Pelican Staff: If I remember correctly, 25Nm. Double check with a repair manual to be sure. - Nick at Pelican Parts  
Jeff Comments: I have a 2001 BMW 330xi E46. Will this procedure work for mine as well? I figured that it will since it will work for the 325xi. Thank you in advance.
March 30, 2014
  Followup from the Pelican Staff: It will. The lower nuts may be a bit harder to access due to the all-wheel drive system. - Nick at Pelican Parts  

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Page last updated: Tue 8/15/2017 02:22:26 AM