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E28 (1982 - 1988)

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  #1  
Old 07-22-2013, 04:51 PM
Bullocks! Bullocks! is offline
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Location: Grove City PA
 
Join Date: Jul 2013
Posts: 2
Mein Auto: 1983 UK imported 520i
Nasty front end vibration! Help!

First off, hello! I am new to E28s. I was on here before when I had my e36 but forgot my login info so made a new account.

Anyway, i just bought a 1983 520i. It is a true euro model, right hand drive and all. Not a federalized gray market.

I drove it home about 75 miles and it was fine. Then i started getting a front end vibration through the wheel at 49-51 mph. That was with the stock 14" wheels. I put on a set of 17" style 19s and now it is more violent and from 45-51 mph. I originally thought it might have been a bad tire on the stockies, but now am not sure. Any ideas?

My friend had a similar issue with a 97 540i. Turned out to be a thrust bushing? He replaced the entire upper control arms on both sides.
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  #2  
Old 07-23-2013, 11:28 AM
joem52002 joem52002 is offline
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Location: Dover, NJ
 
Join Date: Jun 2013
Posts: 24
Mein Auto: e28M, 2002
Thrust arm bushings go soft and give a shimmy especially under braking.
Easy enough to replace if you are a home mechanic.
I replaced mine with thrust arm bushings from a 750i but needed to do some mods.
I think they are same diameter, but longer length. Had to remove some length by
using a lathe. Much more beefy.
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  #3  
Old 07-24-2013, 12:26 PM
catso's Avatar
catso catso is offline
catso
Location: Chicago
 
Join Date: Dec 2009
Posts: 2,946
Mein Auto: 2000 323i, 1988 528e
Quote:
Originally Posted by joem52002 View Post
Thrust arm bushings go soft and give a shimmy especially under braking.
Easy enough to replace if you are a home mechanic.
I replaced mine with thrust arm bushings from a 750i but needed to do some mods.
I think they are same diameter, but longer length. Had to remove some length by
using a lathe. Much more beefy.
It's only one of the parts that can cause vibrations. Worn lower control arms, struts, strut mounts, loose bolts, bad wheel bearings, worn tie rods and/or worn center leak, bad idler arm, unbalanced tires, etc. Many times the combination of many of these parts being worn is the problem. That's one reason why lots of parts suppliers sell entire front end kits; so you can make sure every weak point is brought up to spec.
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Last edited by catso; 07-24-2013 at 02:49 PM.
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  #4  
Old 07-24-2013, 02:33 PM
joem52002 joem52002 is offline
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Location: Dover, NJ
 
Join Date: Jun 2013
Posts: 24
Mein Auto: e28M, 2002
I totally agree; all parts work together, so best to do it right
and look at the entire system.
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