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      04-14-2024, 06:52 PM   #1
Drummer$Dude
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New shocks, new struts and new springs

This weekend I kicked off my Z4 upgrades and maintenance.

My Z doesn’t have adaptive suspension so the upgrade path is easy. I chose Bilstein B4 which is supposed to have a similar ride quality to stock. I thought about B8’s but my wife already complains about the “bumpy ride”, and here in Michigan we are known as the pothole state. That’s why I’ve stayed with 18” wheels and dumped the run-flats shortly after buying the car.

I did opt for the Eibach sport springs which lowers the front and rear slightly. The new spring install on the rear was by far the most difficult job. Shocks were super easy to swap out. I will install the struts next weekend. All the bits and pieces are new except for the nuts that hold the top shock mount in place. I neglected to order those but no harm done.

I also bought a replacement drivers side seat belt and will install it this week. Why? The current belt is frayed along one edge and the seat belt mechanism would not retract consistently. It may be extended for a week, then all of a sudden it would work as it should. A few years ago my local indie shop quoted about $585 for parts and labor. FCP Euro had the seat belt for $150.

I will say this… A mid-rise scissor car lift is on my shopping list. I haven’t broached that subject with my wife yet.
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Last edited by Drummer$Dude; 04-14-2024 at 06:59 PM.. Reason: Photo formatting.
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      04-15-2024, 03:28 AM   #2
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And the ride is?

Surprised the rear springs were a struggle …

Good write up!
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Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
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Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
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      04-15-2024, 10:09 AM   #3
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And the ride is?

Surprised the rear springs were a struggle …

Good write up!
B21, removing the old springs was the difficult part. Inserting the new springs was easy. I didn't have time to install the struts as we had some visitors stop over. I'll do that this week after work.

And B21, I thought you'd like the color of my spring compressor, which by the way makes it super easy to remove/install strut springs.
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      04-15-2024, 03:23 PM   #4
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Congrats. Please show us the end product once complete.
Cheers
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      04-15-2024, 04:18 PM   #5
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Quote:
Originally Posted by Drummer$Dude View Post
B21, removing the old springs was the difficult part. Inserting the new springs was easy. I didn't have time to install the struts as we had some visitors stop over. I'll do that this week after work.

And B21, I thought you'd like the color of my spring compressor, which by the way makes it super easy to remove/install strut springs.
I’m impressed you have a spring compressor ..the fact it’s the correct colour is even more impressive!-
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Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
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      05-12-2024, 05:17 PM   #6
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Hello all. I finally completed the strut install. I’ve had a few weekends filled with family activities so started the strut install last weekend and finished it up today. I put about 30 miles on the road and can report the ride feels balanced and controlled. Shallow potholes are handled with ease, which is important here in the pothole state. No, I don’t make it a habit to run over them but sometimes they can’t be avoided.

Like most people I struggled with removing the old strut from the carrier but after giving it some thought I made a “tool” using a 2x4 about 3ft in length with a cutout on one end so it would fit around the old strut. I then took another piece of 2x4 about 10”-12” long and placed that piece between the carrier and the long 2x4. I was then able to push down on the long 2x4 until the strut popped out the carrier. Also the Schwaben Spindle Housing Spreader Tool worked very well.

I’ll draw up a simple diagram and share it tomorrow.
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      Yesterday, 01:36 PM   #7
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Here's my "Flintstones" tool. LOL It really did work well.
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      Yesterday, 01:49 PM   #8
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Quote:
Originally Posted by Drummer$Dude View Post
Hello all. I finally completed the strut install. I’ve had a few weekends filled with family activities so started the strut install last weekend and finished it up today. I put about 30 miles on the road and can report the ride feels balanced and controlled. Shallow potholes are handled with ease, which is important here in the pothole state. No, I don’t make it a habit to run over them but sometimes they can’t be avoided.

Like most people I struggled with removing the old strut from the carrier but after giving it some thought I made a “tool” using a 2x4 about 3ft in length with a cutout on one end so it would fit around the old strut. I then took another piece of 2x4 about 10”-12” long and placed that piece between the carrier and the long 2x4. I was then able to push down on the long 2x4 until the strut popped out the carrier. Also the Schwaben Spindle Housing Spreader Tool worked very well.

I’ll draw up a simple diagram and share it tomorrow.
Bilsteins always seem to work well on E89s
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
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