Sticky steering again!

petermmdk

Member
Hallo Z4 friends!


I know that sticky steering has been discussed at lot before, but I need your opinion on this statement:

IF YOU HAVE HAD STICKY STEERING ONE TIME, THE STEERING WILL NEVER BE NORMAL AGAIN!

I collected my “new” (2004) Z4 3,0 two weeks ago and on my maiden drive 200 km back home it was roof down and full blast on heating. Half way I got sticky steering (although I didn’t know the phrase then!). I got the car home, but was not very happy. Since that episode I have never really felt that the steering was the same as before. It doesn’t centre totally and if I place the steering wheel a few degrees to the left or right it will just stay there.

The first owner was a lady in southern Germany and the second owner only drove 500 km in one year. I don’t think that they have used the car in a way that would have induced sticky steering.

I have started a claim against the seller (big used car company) using the local BMW garage test and verify the problem. They have sent a PUMA to Germany and further testing will commence on Friday. They want to read a “speed signal”?

But back to my question. How do you feel about:

IF YOU HAVE HAD STICKY STEERING ONE TIME, THE STEERING WILL NEVER BE NORMAL AGAIN!


Peter, Denmark


PS
The most realistic reason for sticky steering I have heard is this:
BMW stated that conditions of “sustained high temperatures, combined with long periods of intense sunlight” can cause the worm gear within the EPS system to expand causing increased friction within the system.
BMW has implemented three modifications to the steering system components in the subject vehicles in its efforts to reduce friction during high ambient temperature conditions. In mid-June 2005, BMW began producing steering systems with revised dimensional adjustments between the worm gear and worm gear shaft. These modified components, which were produced for service parts only, have lower internal friction during high ambient temperatures. On July 5, 2006, BMW implemented two additional production changes: 1) a new machining process that produces a smoother surface of the worm gear and 2) a new lubrication for the worm gear.
 
Peter,

just a comment - I was worried I had "sticky steering" too, but if you have the same wheels as I have (108s with RFT) then the increased "channel following" on the road will feel a bit sticky. my car handles differently with the 16" non-rft winter wheels on.

As far as I know, "Sticky steering" is a very significant effect, mine is very minor.
 
pog451 said:
Peter,

just a comment - I was worried I had "sticky steering" too, but if you have the same wheels as I have (108s with RFT) then the increased "channel following" on the road will feel a bit sticky. my car handles differently with the 16" non-rft winter wheels on.

As far as I know, "Sticky steering" is a very significant effect, mine is very minor.

From what he says I think this is genuinely a sticky steering issue rather than tramlining. Mine does it, and I know a lot of people have been affected by it on here. Some people have managed to "grease up" the affected area and have reported it cured their issue, but whether it cured it long term or not I don't know.
 
Hi sp3ctre and pog451

I certainly had real Sticky Stering. When you have it you know. Very special and unpleasant experience.

But I don't any more as the seller (a very big used car company) fitted a new steering rack under the 3 month 100 % warranty that the car came with. The price from a official BMW garage was Danish Kroner 28.000,- (£ 3.250,-) so they did it themselves.

Now it is top down and full blast on the heating. Did 50 km this morning with a ambient temperature of 6,5 Celsius. Makes you happy :D :)

(But I agree that the 18" 108's tramline a lot. Hope non RFT will help? I now have 17" wintertyres and the car is more comfy and a lot of fun on the slippery roads, as it is sideways in every corner :evil: )

Regards from Denmark
 
I hope that's not the case because I've owned my vehicle for less then 2 months and experienced this in 55 degree weather the other day on a quick drive. When I got back in to the car 20 minutes later the steering was back to normal but the next day my battery was dead and when I gave it a jump start the service engine soon light came on. The car is at bmw right now but even though I'm still under my 2 month 2k miles warranty from the dealer they won't pay for the fix. I love the car but this is getting to be insane.
 
Hi Droz4

I don't think that the Sticky Steering (SS) and the battery thing are related. The SS is a purely mechanical thing.
"cause the worm gear within the EPS system to expand causing increased friction within the system"

55 degree is cold - isn't it? Then don't use the heater on full blast in the foot well. I only had the problem once after a 100 km drive with full heat.
 
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