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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Oct-02-2017, 04:41:36 AM   #1
rovert604
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Default Do KWV2 rear struts rebound...

...when I use my hand to compress them, automatically?

I thought a shock should bounce back in a controlled manner but I've been getting different answers.



Just wanted to know if anything was wrong. I see no sign of leakage or oil anywhere.
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Old Mon, Oct-02-2017, 05:49:20 AM   #2
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Default Re: Do KWV2 rear struts rebound...

Pull on them to test rebound. If they resist well and even, if you can't pull them out easily, then they're ok. Pretty impossible to tell HOW good they are by hand, I mean telling whether they've got 90% life left or 50%. More of a test of whether they're blown out or not.
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Old Mon, Oct-02-2017, 11:11:53 PM   #3
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Default Re: Do KWV2 rear struts rebound...

Well I know when I drove my car I never felt any bouncy, bouncy like a Chevy Caprice going over a speed bump with springs only. My car twerks in a very controllable Cyrus manner. LOL.

I just cleaned up the shocks and by using my own strength, compressing or pulling the shock up is slow and steady. There is no play or any unsmooth movement. I noticed that if I pressed down with all my might in a sharp hit the shock would compress then bounce up just a tad when I let go as it recovered, all the while I can hear fluid/oil inside the tube moving from one side to the other.
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Old Mon, Oct-02-2017, 11:39:05 PM   #4
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Default Re: Do KWV2 rear struts rebound...

They could be at that point where they're not completely gone, seem fine in your hands, but can't rebound enough to control the car. A bouncy car is a sign as you know. Is this with them adjusted to slowest rebound (stiff/full)?
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·Evolve-R Alpha N · Evolve CSL CF Airbox · Eventuri Scoop · Supersprint V1 stepped 63mm · SS V1 S pipe 63mm + 200 cell HFC · OE sect 2 60mm · SS Sport 60mm
·Besian · RE pullies/fan delete · WPC rod bearings · GroundControl S/A (Koni/Eibach 440/525) + tall RSMs · TMS Camber & Subframe plates · SPC Adj alloy rear camber arms
·RE Trans Mounts · AKG poly SUB/DIFF 95a · SDW RTAB · Weighted ///M knob + UUC DSSR + delrin carrier bush · OE CSL trunk · APEX 75mm Studs · ZHP 13.7:1 P/S Rack
·Sportline 8S 18"x8.5/9.5" · MPSS 245/275 · Brembo 996 36/40 345mm CSL Textar D917 FF & 28/30 328mm CSL ATE D738 FF · CM brackets & ss/teflon lines
·Pioneer DEH-80PRS · Eclipse PA5422 · CDT HD-6 + WS-100i · CDT EX-530 · 8" Kicker

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Old Mon, Oct-02-2017, 11:48:31 PM   #5
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Default Do KWV2 rear struts rebound...

I don't believe KW are gas pressure shocks.
Most single adjustable shocks are only adjustable in rebound.


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Last edited by bluptgm3; Tue, Oct-03-2017 at 02:14:04 AM.
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Old Tue, Oct-03-2017, 12:55:08 AM   #6
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Default Do KWV2 rear struts rebound...

I just did another test with them on full stiff. I realize that KWV2 adjust just rebound. Compression is static and on adjusting.

On full stiff it took more strength to extend the shock and even then, the shock extended far slower than when I had it on full soft. Compressing was the same speed no matter what setting. Guess that is working!
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Old Tue, Oct-03-2017, 01:52:42 AM   #7
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Default Re: Do KWV2 rear struts rebound...

Trevor - I just realized after all these years that your screen name it your name backwards.

Son of a....
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Old Tue, Oct-03-2017, 02:09:38 AM   #8
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Default Re: Do KWV2 rear struts rebound...

Quote:
Originally Posted by EricSMG View Post
Trevor - I just realized after all these years that your screen name it your name backwards.

Son of a....
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Old Tue, Oct-03-2017, 02:20:05 AM   #9
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Default Re: Do KWV2 rear struts rebound...

LOL Eric! Back on topic! Or is my shock fine? LOL
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Old Tue, Oct-03-2017, 01:17:39 PM   #10
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Default Re: Do KWV2 rear struts rebound...

Quote:
Originally Posted by rovert604 View Post
LOL Eric! Back on topic! Or is my shock fine? LOL


I have v1's that I got from a buddy that have quite some mileage on them (I'd guess 20-30k miles but actual is unknown). I remember when installing that the struts compressed rather easily and my car feels VERY soft/saggy in the rear as you explained in a previous reply. I plan to have them rebuilt over winter but the more I read about KW v1 and v2, it seems like other people say the same thing about being a very soft setup. Now I'm on the fence between a rebuild (~$500 from KW) or new coils with linear springs (~$2k+).

Do you know the mileage on yours? I'm wondering if the springs also wear out over time, even though the KW rep claims it is most likely just the struts.


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Discussing Do KWV2 rear struts rebound... in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)