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Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 04-09-2014, 04:14 PM   #1
Haeresis
Registered User
 
Join Date: Apr 2014
Location: Houston, TX
Posts: 2
My Ride: '04 330i
Wheel hop on acceleration/turning, '04 330i

Hi all,

I'm having a wheel hop issue with my 330i that has recently gotten quite a bit worse. It manifests as a rapid THUNK-THUNK-THUNK that shakes the car as it happens. It is very noticeable when accelerating at slow speeds, and particularly when turning. It seems to be at its worst when I take a turn at a light or stop sign, while accelerating out of the turn. The issue seems to be focused on the right rear, though I expect if it's a worn component, both will need replacing.

The car has 106k, and I've owned it for a year. The only suspension component I've replaced is front LCAB's. The rear tires were changed last week, but I expect this has nothing to do with the actual problem, except perhaps bringing it to light.

Today, I jacked up the car and crawled under it. There aren't any terribly obvious problems. In fact, the only thing I saw that looked suspicious was the sway bar's connection on the right side of the car. The end appears to be not completely "in" the bushing. I yanked on every component I could find, but there didn't seem to be any obviously bad bushings/bearings/ball joints. The shocks don't look great - and these were my first thought, but it seems that it'd be hard to truly test them without actually removing them from the car. I poked at the RTA bushings, but they felt ok. The guibo at the driveshaft also seems to be ok, and I don't think these symptoms really line up with expectations if it needs replacing.

I'm attaching a number of pictures which show the entire set-up, including the left side, in case it's important. The right side pictures clearly show the sway bar link. Any help or suggestions would be greatly appreciated. I don't mind changing parts, due to the car's age, but I'd prefer to not have to dismantle it more than once.











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