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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 09-30-2011, 12:29 PM
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Vibrating me CRAZEEEE

Hi everyone, the name is Cedric from Cape Town, South Africa. I have a problem on my 5 day old e36. It started with a slight vibration on the steering, sought of like unbalanced wheels. So, i had the wheels balanced, put on and still the same thing. Had the ball joints and bushes replaced, and guess what, still the same. Now this vibration comes and goes as it pleases. I can drive 120km/h and nothing, and all of a sudden it starts and I cant even drive 60km/h. Pls guys I need your help here, or at least advice. My wife aint to happy with this buy as we never really got to use the car. Oh, also had new rims put on the car. Thanks.

Oh, forgot to mention, it's a 94 model 325i

Last edited by ballistic; 09-30-2011 at 12:35 PM.
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#2 (permalink) Old 09-30-2011, 03:15 PM
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Welcome to Bimmerwerkz, mate...
Your issue could be warped rotors/discs or even the centre prop bearing !


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#3 (permalink) Old 09-30-2011, 07:39 PM
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Hi, thanks for the reply. But surely if it where warped rotor disc it would be a persistant vibration, would'nt it? This vibration comes along randomly? Could it maybe be a sticky caliper?
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#4 (permalink) Old 10-01-2011, 11:41 AM
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If you had a sticky caliper then it would heat the wheel up so have a feel of each wheel after a run! Also if a caliper is sticking you will notice the pads wear at an angle and look glazed...
A warped disc will vibrate just like an unbalanced tyre ...


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#5 (permalink) Old 10-16-2011, 04:31 AM
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Wheel bearings/ brakes/tierod ends, inner or outer/steering rack--Any reputable tire/alignment shop should be able to help diagnose.
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#6 (permalink) Old 10-16-2011, 09:06 AM
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thanks for the replies guys. Vibration still there after replacing numerous parts. Got another problem, vibration coming from the rear of the car and going towards the centre. Spoke to a macki and he said it is the props universal joints. Just about ready to set the car a light.

Anybody want it! lol

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#7 (permalink) Old 10-17-2011, 03:08 PM
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Yeah, post it to me Hahahaha...


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#8 (permalink) Old 10-17-2011, 06:40 PM
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Got to be on the driveline Tight u/joint or centre bearing.
Good luck
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#9 (permalink) Old 10-17-2011, 08:15 PM
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Got to be U joints, centre bearing causes a knocking sound isn't it?

And does all 325i auto's have a rubber coupling between the box and prop?

Mine does'nt.

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#10 (permalink) Old 10-18-2011, 07:20 AM
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Most BMW's have a factory installed rubber guibo between the tranny & drive shaft; as well as a balancer. I have seem them dry rot and tear but never just tear as the amount of torque need to do this would be something to truly behold.

The vibes in the front could come from any of the above mentioned items, except the rear axle cv-joints.

An improperly pre-loaded center bearing can cause harsh shifts, intermittent vibrations that tend to wander, constant vibrations and hi pitched squealing when bearing finally dies. Also, flat spots in the u-joints can cause wadnering vibes if coupled with the afore mentioned center bearing issues. Pre-load on the center bearing keeps shifts crisp/ solid and not stiff or clunky. As the rubber in the center bearing wears this pre-load goes away.

Start simple/ cheap on your checks. One, if you have warped front rotors a simple check, jack the car and spin the wheel, if brake pad makes intermittent contact that is a safe bet, not so on the rear if your car has internal rear e-brake shoes this test can be mis-leading. On the rear you will have to isolate the rub. It is usually easier to pull the rear wheel and spin by hand to confirm beacuase you have a better feel and easier isolate the source.

I do a wiggle test on wheel bearings. If there is any doubt I pull the wheel and pop the dust covers to check.

Same with front ball joints, steering linkages and rod ends. A simple wiggle/ lash / play check. A key indicator will be if the dust boot is missing.

Any of the above steering and suspension items can give an itermittent vibration. The cars speed effects a certain harmonic thus vibration. This vibration coupled with the tracking of the wheels (which is affected by the stiffness/ looseness of the bearings, steering & suspension links & rods) is what causes pro-nounced/ discernable vibrations in the front & rear of the vehicle.

The trick is to start with the easiest, isolate, negate and move on. Sometimes you get lucky and get it on the first shot; other times you get the joy of learning tips & tricks to share with others.

Good luck...

is est, quis is est ...

Last edited by dyn2liv; 10-18-2011 at 07:32 AM.
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