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YOUR RESEARCHLocating irritating "zing" sound
Reported or suspected cause
whole suspension is exposed
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Suspected cause · Original poster
Probably the whole suspension is exposed to it, but i cant feel anything from the suspension, its as firm and accurate as always, and the sound does not follow the suspension movement, more the body roll.
Leading evidence: 'whole suspension is exposed' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'whole suspension is exposed' (1 discussions; 0 report identifying it and 1 suggest it). 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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whole suspension is exposed
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause · Original poster
Probably the whole suspension is exposed to it, but i cant feel anything from the suspension, its as firm and accurate as always, and the sound does not follow the suspension movement, more the body roll.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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I have a 2002 996 which recently have developed a new highly irritating noise. It started occuring after having the car in for fluid film anti corrosion treatment.
The sound is like a light "zing/ding" and comes only when driving on bumps that makes the car body flex or vibrate, but not or other bumps.
Its like when the body flexes it goes like " ziiiiiing ziiing zing...", like a bolt with a loose washer which hits the bolt head repeated times with lower and lower velocity.
It is impossible to locate the sound. From what I hear its loud enough to be inside the car. Like inside the dashboard on the passenger side.
The sound is also coming more frequently and louder.
What is a fluid film anti corrosion treatment? Did they apply this stuff to the underside of the body? Did they spray any part of the suspension? Overspray?
Fluid film is something they spray on the whole underside of the body. They removed all wheels and plastic from the underside and applied it everywhere.
It is basically liquid fat based on lanolin, which is excellent against corrosion as it creeps in everywhere.
Probably the whole suspension is exposed to it, but i cant feel anything from the suspension, its as firm and accurate as always, and the sound does not follow the suspension movement, more the body roll.
I tried filming it and cutting it so that you may hear it, its so much noise from everywhere, the rattling stereo, studded tires, engine etc...
It looks like its filmed with a potato, but my phone holder is not really stable...
https://www.youtube.com/watch?v=XP1v...ature=youtu.be
You do know that the entire underside of the car was coated with cosmoline from the factory and the entire body is galvanized? Do you live in a location where there is lots of snow and salt? From the studded tire comment it seems that may be the case. Just a suggestion, take it back to the place where the coating was applied and have them ride along with you. They might have experienced something like this before. If you didn't have the zing sound before, and you had the coating applied and now it is there, must have something to do with the stuff that was applied.
I live in Norway, here they spray so much salt on the roads during winter that all cars corrode :/ Thought about it, but also thinking about if I should deliver it to a workshop and have them look for it as it needs an alignment anyway.
But to me the sound could also be on the inside, but its so hard to place it
I hear that too Bill (again, with noted hearing loss). Is the stereo completely turned off in the video, or just volume down to zero? Mine makes a somewhat similar crackling noise from one speaker on the passenger side, that I have to track down.
Loose radiator fan? How far apart did they take the front end, to do a spray process I'd expect the front bumper cover off..
FWIW,, A good place to get tips about protecting metal is the home-built experimental aircraft realm.
Planes cant rust or it doesn't end well.
Linseed oil works great for blind spaces if you can tumble it to coat the inside.
It hardens like cosmoline with O2
Took out the navigation unit today and looked and felt inside the dashboard for loose parts.
Was not in there, but at least it was not in vain as I eliminated the rattling from the PCM unit. It was missing a screw om the antenna unit on the back. Also padded the whole space in there with furniture protection pads...
So next thing to do is to get it jacked up and have a look under, hopefully in the next few days
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