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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Jan-06-2010, 11:16:59 PM   #1
Donovan
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Default Knocking sound: Front left tire region Help please...

Every time I go over a bump I hear a loud knocking noise as if something is loose on the left front tire area. I dont have any lights on my dash indicating anything, however what I think it maybe is a loser strut tower. I recently installed ACS strut brace and maybe thats what I hear not properly tigthen down;or maybe that struts just gone dead on me. Perhaps someone on the forum has an idea or a thought of what it might be and what I CAN LOOK FOR once I put it up on the lift.



viele danke
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Old Thu, Jan-07-2010, 01:00:35 AM   #2
lsb
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ck for a loose sway bar link
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Old Thu, Jan-07-2010, 02:15:46 AM   #3
Donovan
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Thank you lsb.

1. Strut tower
2. Sway bar link...so possible.. because I still have control over everything..
3. Strut integrity
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Old Thu, Jan-07-2010, 05:34:50 PM   #4
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I checked:
sway bar links both sides..
strut strength
tie rods
lugs on front tires
...but the mechanic that was near me said that after installing new stronger sway bars, mine are HR on setting number 2, that its best to change the links as well. I cannot remember what the specific term is, but he called them dog bones that connect to the strut tower.

BUMP
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Old Thu, Jan-07-2010, 06:08:54 PM   #5
alanbmoore
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FCABs?
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-Alan
'04 M3 - SMG
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Hotchkis sways - 2.5deg front camber - 18x9.5 VMR CSL reps - Nitto NT-01 275s - PFC06's - Schroth Quickfit
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Old Thu, Jan-07-2010, 07:59:49 PM   #6
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you're talking about the swaybar end links (dogbones)
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Old Thu, Jan-07-2010, 09:51:09 PM   #7
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When i went to bigger sway bars the link wore through the paint on the pass side and the link got lose(just tightened the link). If i was drivind 30mph and quickly(not fast or slow) rocked the wheel a little back and forth the noise was easy duplicated. If i hit a bump evenly with both front wheels, no noise..

When i check links on a lift i grab the sway bar by the link and pull down and push up one side at a time with my body weight, you should feel knocking in your hands if the joints are bad, the ball joints in the links go bad at some time.
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Old Thu, Jan-07-2010, 10:01:19 PM   #8
Donovan
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But I pulled everything and tugged everything.. nothing felt loose , however I guess it would take a good amoutn of force to move them. Should I order some new links? Also today it sounded like the tires are doing something weird as well.
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Old Fri, Jan-08-2010, 03:31:24 AM   #9
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Bump for a bit of help..putting it backon lift tomorrow
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Old Fri, Jan-08-2010, 06:34:57 AM   #10
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Could be a blown strut.
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Discussing Knocking sound: Front left tire region Help please... in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)