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      06-15-2014, 09:41 PM   #1
sipman
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Knock in steering that isn't bracing

Hi all,
I have a knock up front when I turn from side to side. I've tightened my strut to center bolts but no relief. Torque checked my wheel bolts and they are correct.

So any places to start looking? I'm thinking ball joints, maybe?
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      06-15-2014, 11:16 PM   #2
Finnegan
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I'm thinking ball joints too. Mileage?
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      06-16-2014, 09:58 AM   #3
jdoublehcubed
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Sounds like sway bar bushings to me.

Audi has sway bars with a plastic coating that tends to delaminate and get stuck to the bushing, I don't know if BMW sway bars have the same tendency. The sway bar bushings could be sticking either way.

Easy check, hit your sway bar bushing with some thick grease from a grease gun.

You have like 30-40k miles right? Sounds too low for ball joints to fall, unless you got a defective one. Probably something rubber that failing from age instead of miles.



note: did you torque the brace to strut bolts as well, or just brace to center? mine was loose on the strut dome end when I caught it.
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      06-16-2014, 01:29 PM   #4
nekky
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Quote:
Originally Posted by jdoublehcubed View Post
Sounds like sway bar bushings to me.

Audi has sway bars with a plastic coating that tends to delaminate and get stuck to the bushing, I don't know if BMW sway bars have the same tendency. The sway bar bushings could be sticking either way.

Easy check, hit your sway bar bushing with some thick grease from a grease gun.

You have like 30-40k miles right? Sounds too low for ball joints to fall, unless you got a defective one. Probably something rubber that failing from age instead of miles.



note: did you torque the brace to strut bolts as well, or just brace to center? mine was loose on the strut dome end when I caught it.
I had one of these noises too and it was loose swaybar endlinks... Check those.
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      06-16-2014, 06:11 PM   #5
sipman
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Thanks all. Mileage is approx 24k.
I'll check both. Is there a good method to check balljoints and links? I'm hoping if it makes noise, there is enough wiggle room for me to discover the culprit by hand but if not, is there an established method?
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      06-16-2014, 07:04 PM   #6
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Check your control arm bushings... There is a possibility that they are causing the knocking.
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      06-16-2014, 08:48 PM   #7
jdoublehcubed
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There's a gauge thing bmw uses to apply pressure using a screw and see if it moves, but I don't think its easy to use or widely available. I usually just pull on mine to see if I feel any slack, and maybe throw a wrench on it to make sure the nut is tight.

You could also try having someone turn the wheel (while the car is stationary) while your head is close to the wheel, and see if you hear it pop. Then try the same thing with it in the air and the suspension unloaded. Not sure if you'll replicate the loading accurately enough, but it might work, and it would help you narrow it down a lot more. I think I'd start with that before you take anything apart.
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      06-16-2014, 09:01 PM   #8
sipman
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I torqued the inner and outer, but I haven't torqued the cross brace. I'll start the official investigation this weekend
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