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YOUR RESEARCH04 C4S odd noise when accelerating in turns both right and left
Leading reported evidence
Check wheel bearings
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
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1
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04 C4S odd noise when accelerating in turns both right and left
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Leading evidence: 'Check wheel bearings' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check wheel bearings' (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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04 C4S odd noise when accelerating in turns both right and left
Test 0-60, hp, and lateral gs
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion · Original poster
I did some lively driving to test the 0-60, HP, and lateral Gs.
04 C4S odd noise when accelerating in turns both right and left
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I have put about 2k miles on the car and have not heard this noise before today. It is also only the second time I have driven with the top up so the noise may be more pronounced. I took a spirited right turn and was accelerating hard when I heard the noise. I thought maybe it was just the PSM kicking in and dragging a break. I then made a slow left turn with no noise. Then made another left under moderate acceleration but not nearly enough that the PSM should engage. The grinding/scraping sound came back.
If a ball joint is loose/failing on the lower control arm, it can allow the knuckle to travel enough that the control arm will push the splash shield into the brake rotor and cause a scraping noise. This will only happen while turning one direction on each side. Right turns will make the left side scrape, left turns will make the right side scrape.
In any event it's worth checking to see if the splash shields are rubbing the rotors. They can get bent pretty easily and then when things flex a little during turning they can scrape the rotor. Not a big deal, just bend them back away from the rotor slightly.
Also check wheel bearings as 808Bill said. Jack the corner up and spin the wheel by hand to feel for roughness, and rock the wheel in and out at 12 and 6 to feel for play.
A little more info. The last drive before hearing the noise I got caught in some heavy thunderstorms. I had ordered an OBD II previous to the incident and the reader came today. I decided to check out the reader performance and see if the noise was still there. I did some lively driving to test the 0-60, HP, and lateral Gs. The sound was gone.... I tried PSM on and off with no difference. Could something have just got water where it should not have been?
Rotors can rust pretty quickly when wet. If your car sat in the rain, then it could make some grinding noises the first few miles before the rust gets knocked off the rotors. You'd probably have heard that before though, it happens all the time in all cars.
This is a source reference. Confirm exact model applicability in the original material.
