7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPesky pesky knock and bang! 1999 996 C2
Leading reported evidence
Run 996.1 billstein coilovers
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Performed · outcome unconfirmed · Original poster
I am running 996.1 Billstein coilovers on 996 C2 carriers and have had them rebuilt within the last year at RE Suspension in NC.
Leading evidence: 'Run 996.1 billstein coilovers' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace back' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
I have 996.1 and 996.2 springs laying around so I could change back to the .1 ones.
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Suggestion
Do you use the GT3 bracket to attach the front ARB drop-link to the shock absorber or something else, I.e.
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I'm hoping this thread might spur some new thoughts as I am stumped.
I have changed control arms, tuning forks, sway bar end links, top mount thrust bearings (Tarret top mounts) and tie rod ends and I still have an annoying knock coming from my front end. I am running 996.1 Billstein coilovers on 996 C2 carriers and have had them rebuilt within the last year at RE Suspension in NC. Whenever I go over a right side bump I hear a heavy knock that is becoming increasingly concerning. Does anyone have any tips? I don't see leakage from the struts. The left side is working fine no issues.
An utterly useless video I just made about it:
You Tube
Pic for height ref. Front height approx 25.5"
Other links searched:
https://rennlist.com/forums/996-foru...front-end.html
https://rennlist.com/forums/996-foru...uspension.html
That strut is missing the spring that maintains pretension on the main spring so that the latter does not come unseated at full droop, which is what you're experiencing currently.
Flat wire spring along the lines of this
https://www.swiftsprings.com/products/h60-060-030
You need a 'spring stack adapter' too, to make it work as intended.
Alternatively, you need a longer main spring.
The OEM H&R/Bilstein combo on the 996 gt3 had such a longer main spring
Thanks. I will look into this. The original parts diagram to not show a provision for this though:
https://rennlist.com/forums/996-foru...-996-c2-5.html
Thanks! Getting into the swift site it looks like they might come with the stack adapters too: H60-060-030
https://www.swiftsprings.com/pages/a...#helperSprings
I have 996.1 and 996.2 springs laying around so I could change back to the .1 ones. I'll buy these and see how it goes with the .2's
I'll make sure to report back.
Thanks, blighty
Happy to read that!
Do you use the GT3 bracket to attach the front ARB drop-link to the shock absorber or something else, I.e. more alike the Carrera attachment plate which is welded onto the strut?
This is a source reference. Confirm exact model applicability in the original material.
