Strange sound when cornering hard

[DaBean]

Hey all,

On a rare empty and smooth 270' onramp here in SF, I was able to push the car a little bit. However, throughout the cornering - which was just below/at tire squeal levels (no comments here guys) - I heard this strange grinding-like sound. It all happened very quickly and I was not able to replicate it afterward.

1. Has anyone experienced this?
2. Anyone have any idea what this is?

Thanks

[TheFlyingMouse]

My old 325e made noises like that when turning because of the well-aged limited slip diff. Never had it happen on my F80 on ED though. Not sure if it is normal for the active M diff, which can go 100% open as needed.

How much throttle did you apply during the turn? My old car made the noise when my foot was off the throttle, which caused a little bit of lockup during turns.

Note that this noise happened to me during normal street driving and got worse and more frequent as the car aged. It was a low pitch sound that cycled in volume and pitch a little bit. Not like grinding gears.

[///bproden]

What corner did you hear it from? I've heard a weird sound once from my back passenger side when I was on my ED trip. Haven't heard it since.

[DaBean]

Originally Posted by TheFlyingMouse

My old 325e made noises like that when turning because of the well-aged limited slip diff. Never had it happen on my F80 on ED though. Not sure if it is normal for the active M diff, which can go 100% open as needed.

How much throttle did you apply during the turn? My old car made the noise when my foot was off the throttle, which caused a little bit of lockup during turns.

Note that this noise happened to me during normal street driving and got worse and more frequent as the car aged. It was a low pitch sound that cycled in volume and pitch a little bit. Not like grinding gears.

I applied partial throttle to maintain speed through the turn, so it doesn't sound like the same problem. Thankfully! A worn diff would be bad at 4,000 miles...

Originally Posted by ///bproden

What corner did you hear it from? I've heard a weird sound once from my back passenger side when I was on my ED trip. Haven't heard it since.

It sounded like it was from the left, but honestly by the time I realized there as an abnormal sound and tried to identify it, I was off the turn already and then it was gone.



I wonder if it was the brake shields that were rubbing on the rotors due to the g-forces while turning... Much like they can make grinding noises if peebles get stuck in there.

[mkoesel]

Sorry can't help - my car makes the same sound while cornering regardless of whether I have an erection or not.

(With apologies OP - if you knew the kind of week I had you'd understand why I needed to throw some humor in at that moment)

[Falafel Combo]

Maybe a pebble got caught in the brake shield, who knows. If you can't replicate it, don't sweat it.

[Lups]

You guys have interesting ways to compensate for the missing stick. ^^

[myzmak]

Originally Posted by mkoesel

Sorry can't help - my car makes the same sound while cornering regardless of whether I have an erection or not.

Originally Posted by Lups

You guys have interesting ways to compensate for the missing stick. ^^

Missing? As MK points out this is a thread about cornering with a woody. Maybe OP should lay off the little blue pills before driving?

[solstice]

Originally Posted by DaBean

Brake shields that were rubbing on the rotors due to the g-forces while turning... Much like they can make grinding noises if peebles get stuck in there.

Close, it's likely the e-brake cable that rubs on the dust shields. The 2nd and much less frequent and less loud reason to scratchy "brake" noises. I have it too now and then, the dealer checked it and aren't concerned to a point they want to do anything and I'm fine with that since it's very seldom and only when I really compress one side by either hitting a hard bump or cornering hard on uneven roads.

[DaBean]

Originally Posted by solstice

Close, it's likely the e-brake cable that rubs on the dust shields. The 2nd and much less frequent and less loud reason to scratchy "brake" noises. I have it too now and then, the dealer checked it and aren't concerned to a point they want to do anything and I'm fine with that since it's very seldom and only when I really compress one side by either hitting a hard bump or cornering hard on uneven roads.

Thanks - I'll bring it in to see what they think

[DrtyJrze]

Yea, I heard that same noise on track. I would guess the diff or one wheel braking.

I'm not a mechanic, but I would hear it consistently on only one turn, which probably meant I would have lost it without the noob assist.

I wouldn't stress about it.

[Red335i]

Originally Posted by DaBean

Hey all,

On a rare empty and smooth 270' onramp here in SF, I was able to push the car a little bit. However, throughout the cornering - which was just below/at tire squeal levels (no comments here guys) - I heard this strange grinding-like sound. It all happened very quickly and I was not able to replicate it afterward.

1. Has anyone experienced this?
2. Anyone have any idea what this is?

Thanks

I have the same issue going on. Real loud banging noise when taking a hard right mostly entering or exiting the highway.