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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 06-13-2013, 01:50 PM
computerwhiz1 computerwhiz1 is offline
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Location: Birmingham, Alabama
 
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Mein Auto: 2000 323i
Motor Mount Replacement Notes

I changed my motor mounts that had been in the car for 14 years and 210,000 miles the other day and I thought I would post some of the lessons I learned so that other people don't have to make the same mistakes I did. The job its self is fairly easy, and really the only hard part is getting the passenger side mount to go in.

This is not intended to be a DIY and I am leaving a lot of information out. This is simply a list of tips I thought would help someone doing this in the future.

The engine wants to jack up rolling towards the passenger side of the vehicle. I was jacking from the oil pan rather than using an engine support. Using an ending support would make this job MUCH easier.

The drivers side mount is easy to replace, the passenger not so much.

For automatics instead of removing the fan, just take the fasteners out of the fan shroud and pull it up a bit so that it can move around freely when the fan comes up as you jack on the engine. This will give you enough room. However, you should still keep an eye on things getting caught.

You have to remove the airbox and upper intake boot to get access to the upper bolt on the drivers side mount.

Remove both top bolts first and then jack up the engine. You will notice the engine comes off the drivers side mount, and if like mine, doesn't lift off of the passenger mount much at all.

I had read in some DIYs that you could leave the drivers side mount in place and use it as a pivot point to help the engine lift off of the passenger mount. I tried this and it worked for a bit and then the drivers side motor mount ripped into two pieces. I don't know if this was because the mount was so old or if anything would do this. My recommendation to you is DO NOT USE THE DRIVERS SIDE MOUNT AS A PIVOT POINT. When it broke the engine fell back down onto the passenger side mount almost causing my dad to loose his hand.

Instead of using the drivers side mount as a pivot point I recommend taking the entire passenger side engine support arm loose so that you can move it around and push it up enough to give you room to slip the old mount out and the new one is. Basically instead of worrying about getting the passenger side of the engine high enough to replace the mount, instead loosen the mount arm so that you an move it around enough to get the old mount out and the new one in.

Don't completely remove the mount arm as it will be a real bear to get back lined up and on with such little room to work.

Realize that your new mounts will probably be taller than your old ones so when you put the new ones in they might not just fit back in the same was the old ones came out.

Go ahead and buy the bolts for the engine mounts. Since they are hard to get to, you will probably mar them up trying to get them out.

If you have any questions feel free to post them and i'll do my best to answer them.
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  #2  
Old 06-13-2013, 02:17 PM
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charlesberry charlesberry is offline
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Location: Annandale, New Jersey
 
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Mein Auto: E46 E89 F30(Msport)
Good info, thanks for sharing. I have almost 200k miles and I'm starting to look at replacing the mounts.
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  #3  
Old 06-13-2013, 03:57 PM
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ahull ahull is online now
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Mein Auto: ist schnell! (03 330i SC)
Good stuff. Thanks for the write-up!
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2003 330i TiAg Sport Pkg ~90k miles
DIY MODS: AA Stage I supercharger, Meyle HD FCAs w Powerflex CABs, Bilstein shocks, Meyle HD Rtabs, Angel Eyes, Clear Corners/Markers w/ LEDs, LED tails, ZHP rims, Akebono pads, AUX input
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  #4  
Old 06-14-2013, 05:14 AM
SPDSKTR SPDSKTR is offline
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Location: Birmingham, AL, USA
 
Join Date: Sep 2011
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Mein Auto: E30 with an S52
Allow me to highly recommend OEM M3 motor mounts.
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  #5  
Old 06-14-2013, 09:07 AM
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Scottji Scottji is offline
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Mein Auto: 2004 325i
Quote:
Originally Posted by computerwhiz1 View Post
Instead of using the drivers side mount as a pivot point I recommend taking the entire passenger side engine support arm loose so that you can move it around and push it up enough to give you room to slip the old mount out and the new one in. Basically instead of worrying about getting the passenger side of the engine high enough to replace the mount, instead loosen the mount arm so that you an move it around enough to get the old mount out and the new one in.

Don't completely remove the mount arm as it will be a real bear to get back lined up and on with such little room to work.
This. Except I took it all the way off (except for the ground strap). I just set it on the control arm so as not to stress the ground strap. Made replacing the mount really easy, and it wasn't hard getting it lined back up.

Last edited by Scottji; 06-14-2013 at 09:08 AM.
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