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YOUR RESEARCH987 noisy interior
Leading reported evidence
Replace with more weather-resistant padding
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Performed · outcome unconfirmed · Original poster
In that case, it can easily be replaced with more weather-resistant padding.
Leading evidence: 'Replace with more weather-resistant padding' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'inner ear fault' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace with more weather-resistant padding' (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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Suspected cause
I am susceptible to pressure variations most likely an inner ear fault.
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Suggestion · Original poster
The idea is very simple -- use padding to brace the hatch harder so it has less room for jumping up and down.
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12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Forum Australia: 1 discussions
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Outcome without a verified action link
There is a Porsche fix (didn't work for me) that is applied to the hatch internally.
Question for the brains trust:
I have a new to me 2008 base cayman.
She sounds lovely with the widows down but with windows up and less exhaust sound it is very mechanically loud in the cabin. There is also the kind of buffeting noise you get when you drive any car with just one window down.
I know the engine is right there and the widows are definitely completely up but it is just unpleasant in there. I'm in Brisbane too so some days you just need the a/c on.
Anyone have this "problem" or fixed this? Or is it typical of a 16 year old car and I need to suck it up?
A mate had the same thing in his Cayman.
He is rarely on here now, so I'll send him your post to see if he can help with what he did to reduce the noise
There are a few people that are effected by this problem, not all. Porsche realised this problem a long time ago and engineered a fix which, for me, didnt work. I am susceptible to pressure variations most likely an inner ear fault. The thumping you hear and feel is the rear hatch moving slightly as the car travels over moderately uneven surfaces. New, smooth roads were fine however any general roads made the hatch move slightly creating the noise/pressure changes you are expiriencing. I tried all adjustments over many months to no avail. There is a Porsche fix (didn't work for me) that is applied to the hatch internally. To see if you have it remove the trim on the inside of the hatch. The fix is a metal weight that is suspended by rubber fixtures, Its there to reduce vibrations and add a little weight to the hatch lid. The hatch is only held bu one central latch which is the actual problem as it allows the hatch to move. The only success i had was to attach 2 Glass Lifting Suction Handles and tie them to the Luggage tie downs on the engine cover. They would eventually loose their suction and fall off and you would have to mess around re attaching them. Also not use the rear hatch. I sold the car after 6 months. I wanted to revisit owning a Cayman last year and drove a friends 2009 Cayman, it was unbearable, the owner noticed nothing. Good luck, buy a Boxster.
Thanks Andrew big help now I know what causes this.
So I found this on another form, seems a pretty common issue so I'm going to try this fix first:
Problem Symptoms: air buffeting (similar to that when you open rear windows in mini van or SUV) / air pressure modulation / slight thumping sensations of eardrums when driving on non-ideally smooth surfaces, mostly at speeds of about 20 to 50 MPH. While fewer than half of people perceive this as a problem, I assure you that close to 100% would see a big difference once it's solved. Further, note that harsher suspension (e.g., lack of PASM, 19" wheels, custom harder suspension, stronger side-walls tires, etc.) make the problem worse.
Problem Cause: The rear hatch of Cayman is huge and heavy and, as it comes from the factory, attaches to the body (in closed state) only by 4 small rubber legs (2 on the sides and 2 on the bottom), besides the permanent attachment points. This leads to the hatch shifting very slightly out-of-sync with the vehicle body on bumps, essentially placing the people in the cabin inside a giant very low frequency speaker.
Solution: I can imagine numerous possible solutions, with the most preferable, of course, being the Porsche engineers fixing this in some way at the factory. All that has to happen is the the free play between the hatch and the body, small as it is, has to be almost completely eliminated. An easy, cheap, and completely and easily reversible solution I found was as follows:
1) Buy the thick felt padding self-adhesive sheets at Home Depot in two shapes -- about 3/4" circles and slightly over 1/4" wide strips of 6" long or so.
2) The round pads (2 of them) go into the round openings where the rubber adjustable "legs" of the hatch go when you close the hatch. Note that the top of the felt tips became almost exactly level with the surrounding metal. The felt circles are a tiny bit larger than the openings, so a bit of effort is needed to get them all the way in. Use something hard but slightly padded and not sharp.
3) Find the 2 rubber non-adjustable legs on the sides of the hatch, and then find the places on the body where they come into contact when the patch closes. On my car, there are strips of thick transparent protective tape there. Cut to size 2 short pieces of the 1/4" or so linear strips of felt and attach there. The goal is to make the leg rest on this newly elevated surface.
It is possible that this specific self-adhesive felt material is not going to stand up to weather too well. In that case, it can easily be replaced with more weather-resistant padding. The idea is very simple -- use padding to brace the hatch harder so it has less room for jumping up and down.
In addition to this, I also bought the thickest and most expensive (it was like $15) roll of self adhesive weather stripping at Home Depot and attached it all the way around the perimeter of the hatch, but in retrospect that really most likely was not necessary.
For those interested, I have messed around with my rear hatch.
I happened to have some felt floor protectors that were perfect for what I needed. They are 3 or 4mm thick.
I put 2 x round ones into the recessed holes that coincide with the round bumpers on the hatch (these bumpers are actually threaded, so I adjusted them out almost to the max).
I cut 2 x thin strips off a long roll of felt and stuck them to the rectangular block higher up on the hatch.
After a drive this appears to have helped a lot but not cured it completely. The rear hatch now needs a fairly hard slam to close it but as the felt compresses this should get easier, although the buffeting may increase again.
I'm wondering if the cayman has some sort of vent somewhere that allows pressure to escape when the doors close, does anyone know?
A bit late to the party. The local dealer coded my 987.2 to open both windows when the hatch is opened. They then close when the hatch is closed. Less force is required to close the hatch.
