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Discussion summary
YOUR RESEARCHBumpstop replacement
Leading reported evidence
Replace bump stop
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
I depressed the shock shaft with a rod after supporting and lowering the hub, then removed the spring, gaiter and replaced the bump stop.
Leading evidence: 'Replace bump stop' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace bump stop' (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
You will need to have your geometry reset afterwards.
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Suggestion
Use some good penetrant on the shock threaded shaft for 24 hrs and try again.
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13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261027T154520Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all,
I have noticed that my front bump stops have seen better days.
I cant find a guide a bump stump replacement guide for the 996 that doesnt involve removing the whole strut.
I have found this for the 986 boxter and presume it's the same?
http://986forum.com/forums/performance-technical-chat/74683-bump-stop-replacement.html
Really keen not to have to have the geo re-done for the sake of some £20 bumpstops.
Any words of wisdom greatly received!
I did mine yesterday morning.
I have M030 suspension, and it was fairly tight so might not be possible on standard length springs.
I removed the tuning fork from the coffin arm, and the drop link from the ARB. Jack under the ballpoint and undo the strut top but. Lower the jack to release the top of the strut. If you aren't don't want to remove the top mount, then you'll need to compress the shock (jack back up against the edge of the top mount perhaps) to give you space to get the spring and bump stop/gaitor off.
Lift the spring as far as possible then lean over sideways so the top 2ish coils clear the top of the shock, then unscrew the spring, being careful not to scratch the ram of the shock with the spring.
These were mine!
My right one needs doing as well.....how hard was it to undo the various bolts?
Looking at the cars history file the bump stops and top mounts were last done 45K ago so it's been a while.
I'm not sure about that. Mine is being done because of top mounts, track rods and rear toe arms.
If you don't touch the eccentric bolts, top mounts or track rods then what has changed?
I did these a couple of months ago (996TT), without removing the struts and without disturbing the top mounts. It was relatively straight forward if the general process described above is followed with the drop link. I depressed the shock shaft with a rod after supporting and lowering the hub, then removed the spring, gaiter and replaced the bump stop.
Well it was all going amazingly well for about 90 seconds.... until I snapped my torx bit. Tried a second one but the nut is stuck fast on the damper shaft. not sure what to do at the moment. Just know it's going to end up escalating into buying a set of ohlins....
Either way, that has to come out Mark. If you have a reverse drill bit, you could try that in the centre of the broken piece to loosen it. Use some good penetrant on the shock threaded shaft for 24 hrs and try again. How were you trying to get that nut off? That is an awful lot of torque on that broken bit. Try a power ratchet for a few seconds ?
I got the broken bit easily enough thankfully!
I was just using a half inch socket by hand, don't know my own strength
It does however look like the bit has/had an air bubble in it so maybe that was a weakness.
I have spoken to 911 Excellence and they have said its not worth replacing the bumpstops until I need further suspension work doing so will leave them for the time being. However I need to take the car to them fairly soon for a service so they an assess further then.
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