15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
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Discussion summary
YOUR RESEARCHC4s Passenger seat shaking?
Leading reported evidence
Check bolts, there are only 4
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Suggestion
Check the bolts, there are only 4 to tighten IF loose.
Leading evidence: 'Check bolts, there are only 4' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check bolts, there are only 4' (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
Overuse of the passenger seat - check for heel marks on the headlining.....
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Suggestion
It must be a fine line if some of you are finding this happens with old engine mounts and replacing them cures the issue, as this is very often one of the trade offs in replacing/'upgrading' the engine mounts.
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Suggestion
Changing the mounts will definitely help with the way the car feels and also should improve the gear change if it is a bit notch.
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Suggestion
It must be a fine line if some of you are finding this happens with old engine mounts and replacing them cures the issue, as this is very often one of the trade offs in replacing/'upgrading' the engine mounts.
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15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261027T053112Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi
Not had this car for long and it appears that I get quite a bit of shaking/vibration in the passenger seat. Surely this isn't normal?
Another thing is left exhaust outlet is shaking but the right isn't.
Thanks for your help.
Hi
Thanks for the replies.
Don't think the seat is damaged is just vibrates.
How do I know if the engine mounts need replacing is there anything I should be looking at?
Hi,
Have a look at the exhaust tips you may be able to see the passenger side is lower than the other.
Not a very scientific method of checking them but without taking the mounts off I don't think you can see from underneath the engine.
If the mounts are original then odds on they will have stretched over the years.
They are an easy DIY job if you have a jack and a socket set. Lots of threads and videos on how to change them and what worn ones look like.
Your next dilemma will be to just change for OEM original or go for semi solid or solid mounts. Lots to choose from and what you get will depend on how deep your pockets are.
Changing the mounts will definitely help with the way the car feels and also should improve the gear change if it is a bit notch. You may also want to get the gearbox mounts changed at the same time.
Cheers :thumb:
My pax seat also annoyingly did this at tickover but since I've changed the engine mounts and also the gearbox mount (Powerflex upgraded) I haven't noticed it.
Actually I'd totally forgotten about it until this thread reminded me!
Just a bit of a stupid thought on my part but is the engine on tick over nice and smooth or a little lumpy ?
I was just wondering that it might possibly be a misfire .
It must be a fine line if some of you are finding this happens with old engine mounts and replacing them cures the issue, as this is very often one of the trade offs in replacing/'upgrading' the engine mounts.
For instance, I never had the issue (of the vibrating passanger seat) , but then when I upgraded to the RSS engine mounts I did get vibration. (and it seemed to be quite a common symptom of the upgraded engine mounts)
It did seem to get lesser after a few months I guess as the engine mounts beded in?
In my case I thought it was a price worth paying for the improved handling.
