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Old 06-07-2018, 05:44 PM
Tommy D Tommy D is offline
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Mein Auto: '05 BMW 330i
Springs and struts

This has probably been asked too many times, but i'm still confused.
I have a 2005 330i, and am replacing the struts, springs and shocks with Koni oranges.
I got the rears done with no issues, one spring cracked after 136K miles.
Replaced with Suplex 06164 Rear heavy duty springs and all new hardware.
Rides nice now.

Now the onto the front struts and they are giving me fits. I used the correct bump stops from realoem.com. All new rubbers and strut mount. Coil springs had no information or part number. Strange. The spring I bought was Suplex 06163 and had them mounted onto the front shock. But I can't get it in the car!
The old setup was around 10" from bottom of bottom pad o strut to top of strut mount, worn 136K struts. My new setup is 12" from bottom pad to top of strut mount. and I can't get it installed even removed the brake caliper. Is there a trick?
Do I have the wrong spring? The shocks said 'Sport suspension', but isn't that just the shock and bump stops and has nothing to do with the spring height? Issue is there was no other option for a spring at FCPeuro unless I went with lower springs.
Anyone have any insight?

OK, Further research after the fact, the Suplex 06163 or 31331096184 according to ECS only fits the coupes or 330CI. I would need the 06168 or 31331098068 for the 330i sedan. Would anyone know what the difference was? I'm sure it isn't height. Maybe spring rate? I found that the Lesjofers coil springs 40 084 44 fits cars with the sport suspension.

I put the original struts back in and going to take it over to a local independent BMW shop to find out what's going on. I'll let you know in a couple days on the outcome. They get backed up on schedule. Seems I bit off more than I can chew on this one. Bought 2 different spring compressor kits to get the darn things on and the last coil would turn inward. So no go and had to have a local shop install the spring. I'm frustrated that I'm spending more money and aggravation instead of just taking it to the shop in the first place. Frustrating.
'05 BMW 330i - 146,000 miles
'98 Ford Taurus SE DOHC - 123,000 miles
'05 Mazda Tribute s AWD - 138,000 miles

Last edited by Tommy D; 06-07-2018 at 07:20 PM.
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Old 06-07-2018, 08:29 PM
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Fast Bob Fast Bob is offline
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Mein Auto: 2004 330Ci ZHP 3 pedals
Springs and shocks should always be purchased together, so the shocks are properly valved for a specific spring length, so they work in unison. If not, the compression and rebound will be fighting each other, causing squirrely and often dangerous handling.
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Old 06-20-2018, 08:11 AM
protocol1 protocol1 is offline
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Mein Auto: 330i
If the original struts/springs are 10 inch, 12" is to long.\
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Old 06-20-2018, 03:47 PM
Tommy D Tommy D is offline
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Location: PA USA
Join Date: Oct 2012
Posts: 438
Mein Auto: '05 BMW 330i
Got it back together yesterday, I ended up removing the Suplex 06163's and installed the Lesjofers coil springs 40 084 44,they we're 1.5" shorter. Standard suspension vs sport I take it. Installed them on the Koni's and the dimension ended up the same 12". I suspect the rod on the shock is being pushed up all the way. The shop installed the struts with no issues and it rides fine. I read the Tie-rod can be remove to help on the install.

Last edited by Tommy D; 06-20-2018 at 03:48 PM.
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