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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 06-25-2004, 05:54 PM   #1 (permalink)
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Just got a new performance Clutch / Performance Chip / Slotted rotors put in my 1987 325(e).

I decided to see how these upgrades effected the overall performance of my car, I took it out and was in 3rd gear doing about 40mph when I noticed a strange vibration almost like the clutch was slipping. Also when I was doing about 60 - 70mph in 5th did I notice an even odder vibration, I have no idea what this was but it was definately not like the clutch was slipping.

Question:

Anyone else had these issues?

I'm thinking maybe the clutch needs some break in time, but dont think that it should be vibrating like it is being new performance parts. I will be checking the fluid levels tomorrow when I return from work, just to make sure it's not losing any.

Also I had SYNTHETIC put in it, dont think that's the reason but that's some more information to help you with a diagnosis.

Any help is greatly appreciated.
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1987 BMW 325 (e)

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Mods

Eibach Springs
Bilstien Shocks
Performance Chip
Slotted Rotors
Tri-Flow Exhaust
Performance Clutch
Front and Rear Strut Bars
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Old 06-25-2004, 09:29 PM   #2 (permalink)
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I didn't read the whole thing, but most clutches advise a 500 mile break in period. Its not really built up a good contact surface yet, so wailing on it right now is going to be detremental to the life of your clutch.

my interesting vibration is coming from my exhaust, but it may also be what I'm told is called a "gubio" or something. Driveshaft ballencing measure or something. like a rubber stopper that will keep vibrations from my driveshaft from disrupting my drive. However it may also be related to my exhaust only being hung from the cat and the final hanger... haha, it rattles alot. But also when I first start up my car, it bogs down in first gear like it doesn't want to go, then I give it a few hundred more RPM's and its like "fine fine fine..." you know? lol
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Old 06-29-2004, 09:29 AM   #3 (permalink)
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lol, yea been there done that.

Apparently there is a part in the transmission that can be put in 1 of 2 ways, and if it's put in backwards then it vibrates like never before. Car is over getting looked at and HOPEFULLY fixed today.
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1987 BMW 325 (e)

<img src='http://memimage.cardomain.com/member_images/6/web/594000-594999/594791_1.jpg' border='0' alt='user posted image' />

Mods

Eibach Springs
Bilstien Shocks
Performance Chip
Slotted Rotors
Tri-Flow Exhaust
Performance Clutch
Front and Rear Strut Bars
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Old 06-29-2004, 11:55 AM   #4 (permalink)
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what kind of part is it? I had a shop that is sort of known for things like that do the clutch. I Knew it at the time, but the labor was cheap. Haha. So is this a damaging thing? I might go back and see if I can get them to redo that. If you know what it is directly I'd love to call them on it.
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Old 07-08-2004, 06:47 PM   #5 (permalink)
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One thing that might be causing you vibration probems in the tranny is the fly wheel itself. They are equipped with a spring loaded damper and if the springs break it can make some noise. Mine did and I get knocking sounds when idling at a stop, but not when I'm cruising. Just an idea. Those flywheels are in the range of $600 or so, so I just deal with it :P
Also, Halon your vibration could likely be from a bad U-joint in your driveshaft. I had a similar problem, the car bogs down in low gear and makes quite a vibration at varying speeds. I thought it was the carrier bearing but when i dropped the driveshaft I found one of the Ujoints was locked up. I put a reman. driveshaft in and it now its fine.
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