7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWhomp whomp noise form right rear?
Leading reported evidence
Check might suffice
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No successful repair reported for this finding.
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0
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1
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Read evidence and context
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Leading evidence: 'Check might suffice' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check might suffice' (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
Usually from belt separation, possibly from running very low on air at some point in the tires life.
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7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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On my 2000 Millenium Ed, which is a C4 coupe manual.
Just popped up out of nowhere, suddenly, after I had parked it for a couple hours, then got in and started driving it and then heard it.
Im guessing its a wheel bearing or axle. Sounds similar to a warped rotor scraping the warning tab on a worn out brake pad, but the brakes are fine back there. Im taking it to my Indy shop next week, but just wondering what I might should expect. I'm new to 911s, what is back there that could be wearing out, needing replacement, etc...? Just recently bought the vehicle, but have records showing the rear wheel bearings were replaced in 2015, 33k miles ago.
Any ideas, likely culprits?
Thanks for any input.
I have heard of instances where debris gets stuck between the rotor and backing plate. A quick visual check might suffice. A wheel bearing would slowly deteriorate, not all of a sudden. Or, jack it up and spin the wheel and see if you can locate the source of the noise.
Swap wheels left & right to rule out an internal tire failure. While the wheels are off look to see if there's anything stuck inside the wheel or elsewhere that could be hitting something.
E brake shoes stuck/rubbing. Just a guess, since it started after parking.
On another Porsche I had one of the ebrake springs come loose, it made a crazy racket and took forever to solve.
Thanks guys, those are all good ideas.
On the parking brake, when I pull it up, it doesnt feel like a normal parking brake engagement. There is little resistance and then it just stops. Not normal to me where it gets harder and harder until it stops. But this is my first 911 and I just bought it so Im not sure how the handbrake in a 911 normally feels. So when the car was in the shop recently, I told them that and they said they adjusted it, but it feels about the same. Anyway, I will check these things out,
Thanks
Well, title of your thread is "
Whomp whomp noise"
the exact words used in the classic
complaint from internal tire problems. Just as theprf said above.
And It does sound exactly like WHOMP WHOMP WHOMP.....
Usually from belt separation, possibly from running very low on air at some point in the tires life. good chance little rubber ***** would be inside the tire from it coming apart internally. Or just a defective tire.
But, then you say it sounds like the squeal of a worn brake pad senor...????
2 totally different sounds/noises.
So now I'm baffled. What is it, a squeal, a scraping, or a whomp whomp..? lol....
Well it sounds like a thud thud at higher speed, but more of a scrape scrape at low speed. Im about to jack it up right now and pull the wheel and investigate. Im now thinking its the parking brake sticking or out of adjustment
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