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88 535i suspension
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CarGuru > BMW > 88 535i suspension 7 May 2005 01:42:34

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88 535i suspension

Michael Harvey 2 May 2005 22:32:31
 Hi, I have a tough question about my 88 535i suspension.

I get a problem where I can feel the tracking slowly changing while I drive,
a few hours it will be one way (maybe bad), then it will be another way
(good tracking like a new car). Often it will change from the previous day
after backing out of my driveway in the morning. My mechanic can't find
anything loose with the steering or suspension, the bushings are all good,
and it is properly aligned. One thing I notice is if I try to alter the
front alignment (one end of a tie-rod) very slightly, the tracking of the
car dramatically deteriorates. I also notice if the car is not perfectly
aligned, the front rotors used to pulsate considerably before I replaced the
front brakes. With bang on alignment the rotors were smooth. I thought the
wheel bearings were loose, but my mechanic checked them OK.

Any Ideas what is going on here?


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Weird 2 May 2005 23:59:02 permanent link ]
 Your mechanic IS missing something. Having driven a 88 528e for 5
years, and reading lots, and dong my own work. I encounterd the
following issues

Worn idler arm bushing. This will effect toe in/out as the rh front
wheel can move back and forth in relation to the left. Steering was a
bit vague. Replace idler arm.

Rear subframe bushings fell apart. Car did not track straight;
constantly all over the road. Especially around turns where the rear
end will have a mind all it's own.

Front upper control (thrust) arm bushings fell apart. Not real
noticable except under braking, you could feel a clunk and the car nose
would dive to one side or the other. If your rotors are slightly
warped, this will exacerbate the problem and greater shimmy will be
felt.

Worn ball joints, so I replaced the entire lower control arms with new
bushings (original bushings were not bad though).

I did not have issues with the rear "dogbones", but others have.

Lots of archived info on http://bimmer.roadf­ly.org/bmw/forums/e2­8/
about the e28 suspension.

This all took place between 120-150k miles.

Cheers,
Howard

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Bfd 3 May 2005 00:42:48 permanent link ]
 Don't forget to have your tires checked for balance and "roundness"....

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Michael Harvey 3 May 2005 03:45:30 permanent link ]
 
"Weird" <delano_h@yahoo.com­> wrote in message
news:1115063942.125­036.311190@z14g2000c­wz.googlegroups.com.­..> Your mechanic IS missing something. Having driven a 88 528e for 5> years, and reading lots, and dong my own work. I encounterd the> following issues>
Worn idler arm bushing. This will effect toe in/out as the rh front> wheel can move back and forth in relation to the left. Steering was a> bit vague. Replace idler arm.>
Rear subframe bushings fell apart. Car did not track straight;> constantly all over the road. Especially around turns where the rear> end will have a mind all it's own.>
Front upper control (thrust) arm bushings fell apart. Not real> noticable except under braking, you could feel a clunk and the car nose> would dive to one side or the other. If your rotors are slightly> warped, this will exacerbate the problem and greater shimmy will be> felt.>
Worn ball joints, so I replaced the entire lower control arms with new> bushings (original bushings were not bad though).>
I did not have issues with the rear "dogbones", but others have.>
Lots of archived info on http://bimmer.roadf­ly.org/bmw/forums/e2­8/> about the e28 suspension.>
This all took place between 120-150k miles.>
Cheers,> Howard>

I've had it checked by several mechanics, and none could find anything. The
steering wheel is tight. Trailing arm bushings, subframe bushings, and
dogbones in the back have been replaced. Control arms in the front all look
good. Something is moving slowly, not visible from prying and pushing with
the car in the air.


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Bfd 4 May 2005 05:11:01 permanent link ]
 
"Michael Harvey" <MichaelHarvey.nosp­am@sympatico.ca> wrote in message
news:bFUde.5109$VL3­.358166@news20.bellg­lobal.com...>
The thrust arm bushings are 750's from my mechanic who got a whole bunch > of them cheap somewhere. He replaced them a few years ago, around the time > I started experiencing this trouble.
Interesting, you should find out who is the mfr of these 750i bushings that
your mechanic got "cheap somewhere". OE 750i bushings are made by Boge
(green insert) and OE control arms are made by lemforder. Anything else is
sub-par and could mean you may need to replace them (again!)....


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Michael Harvey 4 May 2005 19:40:39 permanent link ]
 "bfd" <bfd853@comcast.net­> wrote in message
news:ZLOdndavgfuCvO­XfRVn-2A@comcast.com­...>
"Michael Harvey" <MichaelHarvey.nosp­am@sympatico.ca> wrote in message > news:bFUde.5109$VL3­.358166@news20.bellg­lobal.com...>>
The thrust arm bushings are 750's from my mechanic who got a whole bunch >> of them cheap somewhere. He replaced them a few years ago, around the >> time I started experiencing this trouble.> Interesting, you should find out who is the mfr of these 750i bushings > that your mechanic got "cheap somewhere". OE 750i bushings are made by > Boge (green insert) and OE control arms are made by lemforder. Anything > else is sub-par and could mean you may need to replace them (again!)....>
I asked my mechanic. He said the thrust arm bushings are made by lemforder,
not Boge. They have a green insert. If these are optimal bushings, I
probably would be wasting money to replace them.

I knew a race car suspension shop (H&R Suspension) who had an unusual
technique for locating moving components. They would do this:
1) Take alignment readings on the ground.
2) Raise the car off the ground, then drop it down, and roll it a bit.
3) Take alignment readings again on the ground.
The difference in the two readings would show the locale of the movement.
This shop used to be near me but they were too busy to fit me in. Then they
moved to Florida taking all the equipment. I still haven't found anyone else
that can do it. Please let me know if anyone knows of a similar kind of shop
in the Toronto, Canada area. When I asked my mechanic he said this technique
is not valid because the components have not had a chance to settle in after
dropping the car down for the second readings. I thought rolling it a bit
would settle it in.


Add comment
Tbird-Steve 7 May 2005 01:23:39 permanent link ]
 Is it an E28 or E34?
The rear subframe to axle carrier links are often worn out and overlooked on
E34's. They can make the back end wander.

Steve


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Michael Harvey 7 May 2005 01:40:57 permanent link ]
 "Tbird-Steve" <sjburley@paradise.­net.nz> wrote in message
news:427bdfe1$1@cle­ar.net.nz...> Is it an E28 or E34?> The rear subframe to axle carrier links are often worn out and overlooked > on E34's. They can make the back end wander.>
Steve>
Almost sure it is E28, but not authoritative. Anyways, I know I've replaced
all the rubber at the back.


Add comment
Michael Harvey 7 May 2005 01:42:34 permanent link ]
 
"Michael Harvey" <MichaelHarvey.nosp­am@sympatico.ca> wrote in message
news:KvRee.27423$3U­.1218878@news20.bell­global.com...> "Tbird-Steve" <sjburley@paradise.­net.nz> wrote in message > news:427bdfe1$1@cle­ar.net.nz...>> Is it an E28 or E34?>> The rear subframe to axle carrier links are often worn out and overlooked >> on E34's. They can make the back end wander.>>
Steve>>
Almost sure it is E28, but not authoritative. Anyways, I know I've > replaced all the rubber at the back.>
I've also replaced the dogbones. Basically everything in the back.


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CarGuru > BMW > 88 535i suspension 7 May 2005 01:42:34

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