22 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHMetallic noise when driving at 0-5mph
Leading reported evidence
Check brakes
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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1
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Suggestion
Check your brakes for hung up calipers or worn lose pads/rotors.
Leading evidence: 'Check brakes' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check brakes' (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
If so, check your CV joints on the rear drive axles.
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Suggestion
If you just had new tires installed, check for a loose wheel weight.
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Suggestion
You don't have to replace the IMS or RMS now, lol......
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22 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T070717Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all!
I just picked up my new (to me) 1999 911 Carrera 6-speed a few days ago! It is a cable throttle/LSD car.
I noticed that when I am accelerating from a stop, I hear a metallic clink-clink noise 2-3 times that seems to come from the rear. This noise happens regardless of whether I'm accelerating with the engine or just rolling down a hill. It almost sounds like something is engaging or something is loose. The clink doesn't happen at higher speeds, only 0-5 mph or when starting from a stop.
Any ideas what it could be? I will post a video of the noise soon. Thanks in advance!
Do you notice this most when turning? If so, check your CV joints on the rear drive axles. When the joints go bad, this usually manifests as a clicking noise. You usually notice this at low speeds only because at higher speeds engine/road noise covers the CV joint noise.
The metallic clink happens when I am driving perfectly straight as well, and I cannot reproduce it at any speed higher than 0-5mph, so I'm not sure it's CV joints... But I will check them soon anyways. Thanks!
When hearing the noise, If you gently slightly apply the brakes when still rolling, does it go away..?
Check your brakes for hung up calipers or worn lose pads/rotors.
I tried this as well, the metallic noise does not seem to be linked to the brakes at all� the clink will still happen 1-2 times when I start rolling without any engine load and with the brakes slightly applied. If I had to guess, I�d say it was coming from the differential� but I am not sure if the LSD makes a noise when it engages or when the car starts moving from a stop.
Record the noise from inside and outside the car, please and post here.
Diff does nothing when driving away in a straight line, so no noise. At full steering lock an LSD could make some noise, an open diff only if broken.
I've uploaded the video to YouTube:
You Tube
Let me know if you are unable to hear it. It feels like it is coming from the right rear area. I will try to get under the car to give the suspension a small jiggle as soon as I can. As I mentioned, I only hear this noise at low speed, when I'm coming to a stop or starting from a stop. I cannot reproduce the noise over bumps at speed, nor does it lessen/worsen based on how much the car is turning or how much the brakes are being applied.
I'm super new to Porsche ownership, so thanks all for your help
This is where I would start, possibly bent by the tech installing the wheel after getting those new tires. I bent the brake dust/heat shield putting Brembo's on my e46 M3 and it sounded kinda the same, I didn't drive the car but spinning the wheels by hand with the car in the air gave me a similar tinny tinging sound.
Thanks for taking the time taking and posting the video, I think I hear the noise you mentioned.
Perhaps a little pebble/piece of gravel has gotten stuck between disk and caliper. In that case reversing might release it and drop out.
Brake shields can't be bent on a 996 in my experience as they don't wrap around the disk, therefore the wheel cannot hit and bend it when putting a wheel to the hub.
Also, imo, the sound I hear isn't the typical screeching of a disk rubbing against the shield.
However, the suggestion of a dangling balancing weight is a very good one, as once at speed the weight will pressed against the inside of the rim by centrifugal force and no longer hit anything, hence no noise then.
Check that all wheel bolts have been properly torqued, even if it doesn't sound like one or more are loose.
Found the culprit! Turns out this massive sensor had fallen into the front passenger tire. Costco found it and is replacing the tire since it seems to have done some damage inside.
Thanks all very much for your help
The sensor
Yeah, it seems to be a random aftermarket tpms sensor. It definitely wasn't from my car, since it does not have tpms sensors. Costco is fixing it under warranty, hopefully they get it right the second time....
Wow, that would be a noise that would drive me crazy knowing all the possilbe causes and it was something inside the tire, go figure! Good for you. You don't have to replace the IMS or RMS now, lol......
