REKIII

I wanted to get a discussion going before I tear into the rear end (mostly because I don't know when I'm going to tear into it and I love driving the car).

Anyone who was near me at Timmayfest heard the horrible noises. Think of an empty aluminum soda (pop) can that you are wrinkling with your hand, not crushing, just wrinklink. Thats the sound.

Here is other pertanent info

Last summer I put all new rear suspension in. Every moving part with a bushing got repaced with new peices, there are only about 5K miles on all parts.
This is in exception 2 the rear control arms which had the bushings pressed out and monoballs installed.
I have older KWV3 coilovers
Brembo 4 piston BBK on the rear
New wheel bearings
New parking brake pads/springs/etc.
The outside CV joint on the drivers axle is leaking
parking brake works well

Hear is a fascinating point.....it only does it when the car is hot/warm. When i get in the car in the morning it is silent, all the way through my 10 mile commute to work. The longer I drive the worse it gets

It doesn't seem to make any noise when the car is smooth, only during accel/decel jerkiness and sometimes over bumps. Front to back motion seems to make it occur more, as I can't really get the car to crunch by jostling it with my body weight when parked.

Any thoughts? It seems like whatever idea I have there are several symptoms that prove that idea wrong. Maybe there are several things wrong, maybe all my new parts are shot. No idea.

Thanks for any input or thoughts.

__________________
2001 Jet Black M5
2008 Raven R1
2007 Black Sierra Denali

rao

I'd be suspicious of the monoballs, but then again I always am

__________________
Rob


Current - 98 540i with Chevy 6.6 LS2/T-56 power - Build Thread
Old - 92 325i with Chevy 6.6 LS2/T-56 Power
Older - 95 M3 with Chevy 6.6 LS2/T-56 Power

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mfizzlenyc

Ive been having the same issue during shifts when the car is warmed up their is a loud pop as you shift...

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2009 135 "Worlds First Frozen 1ER" ESS Tuned stage 2


RIP MFIZZLENYCMOBILE - 12/5/2012 2000 Silverstone M5 extended Leather
213,500 miles !!!!!
Evolve Stage 3 Tune
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mattmartindrift

I don't know the design used, but i agree here.

The front of my car squeaks like mad only when hot, humidity also makes it worse, but I'm fairly positive it's the steering components with 200k.

Before Rob gets snarky: mine had been squeaking since before my monoball install.

rao

Why so hurtful?

jproy

I'll take CV joints/axles for $1000? Your symptoms sound just like it and you already know you have a leaky CV boot. I have little experience with this car but a ton on others and your symptoms all point to it IMHO. You have nothing to lose. You need to rebuild the joints anyway since your boot is torn. Once dirt is introduced you must rebuild or replace IMO.

rao

I missed the leaky boot, that gets my vote as well, but I always remain suspicious of the monoballs.

lugnuts

my vote goes to drive train and sense you have a torn boot I would start there.

I get no noise at all from my fronts.

mattmartindrift

lol, they're brand new. I believe the rear monoballs are a proprietary design that does not use an off-the-shelf/tried-and-true bearing.

REKIII

Here are the monoballs I installed:

Rear monoball mounts

I am doubtfull I could have done them wrong, however they are delrin, so maybe as they heat up they get soft and allow moevement?

I will change the axles and see if that helps. Anyone have a good recomendation on where to buy new ones? I would rebuild, but 1, I hate rebuilding CV joints and 2, they have 134K on them, so replacement isn't a bad thing.

Thanks for all the input and suggestion guys, much appreciated.