Anyone has issue, how to resolve? Solution?

Cheers

 

If you are certain on the wheel balance being correct and (assuming your are using OEM wheels) is the vibration felt in the steering wheel (indicates front suspension problem) or in the seat (indicates rear problem). If you are using aftermarket wheels, ensure you are using the correct bolt seat (conical or ball). You have reported the vibration is felt in the seat. Therefore, I would check to ensure the wheels are not out of round and that the suspension bushings are OK.

Following "Occam's Razor" principle, look for the simplest solution first.

 

Hi Kes.

Assuming this is from the wheels.
My advice would be to start with the simple stuff.
First, check the tyre pressures, if all's OK then get the wheels balanced and perhaps have the tracking checked with a Laser system, most tyre fitting places have them these days. Naturally, avoid Quickfit places.
If that doesn't sort the problem then it could be worn track rod ends, etc.

After that, maybe the only other items that could cause a vibration would be drive shafts or prop shaft.

Les.

 

Thanks. I checked wheels, i checked suspension on purchase, therexwas only front anto roll bar little worn. It must be drive shaft or prop shaft. I noticed that every time vibration changes, sometimes not so noticible, sometimes stronger.

Cheers

 

Did you ever get to the bottom of this?
i have a similar issue, happens between 40 and 60 mph. After that it gets drown out by road noise. Vibration in the steering wheel. Pressure is ok and tyres balance ok too.

 

Theses are invariably suspension joint issues .

After ensuring correct wheel balance .

A friend of mine with a BMW 840 chased his tail time and money wise changing stuff even disks and wheel bearings to no avail .

Uk car passed MOT ,s suspension joints passed the pry bar test etc etc ...last chance saloon and £5 K later new A arm s ( he was offered replace bushes only ) and hey presto .......gone .This wobble / shakes was circa 60 mph so quite annoying.




Back to CGT ,s .

I,am 3 happy years in early 2004 launch modal and had one lower control arm fail a UK mot there was a deep shock on the nearside wheel dropping in pot holes .All cleared , with new part fitted by local spanner man - not a Bentley specialist .

How ever the steering wheel has not lined up with dead ahead .....about 5 degree off straight .No biggie .It was always like that .I put down to road camber or something .Its a 3 rd car and often is laid up for months at a time .So I forget about it .




I took it to a U.K. B specialist this year for its annual and few bits n bobs and enquired about lining up the steering wheel .

It needed new drive shaft boots and steering pipes for the UK mot and one track rod end had play this was an advisory .

The guys hire in a another guy who attends with discs and lasers to do a whole geometry set up .

They often have to use heat to free up the track rod ends .




Any how I ll cut to the chase .......

The geo guy found while on full lock ONLY the two upper control arms on one side loose .So loose he thought they may upset the precise setting up .

I stress the mot guy and my two specialist when the wheels are on and straight said the joints are firm .Any looseness only shows up after the wheels are turned .

We elected to replace these arms and both track rod ends so the geo guy can be surgically precise setting it up .




Wow what a totally transformation of the car .......super sharp steering dare I say it sporty !!!

Ride is uber refined and as silent ( absent suspension sounds ) as you could wish .




So what can we deduce ?

Well we already know BGT ,s eat front suspension components due to the weight .More so with W12 , over V8 ?




Static prying a la UK mot with a brief visual for split rubbers is imho inadequate.....sure it “ passes “ but they still can be past optimum .




Mine never had any vibrations , but was not exactly top draw ride wise a little harsh .....now it superb feels fantastic to drive .My mates 840 shakes are sorted by new A arms ( the existing passed UK Mot btw ) .




Hope this helps .




I think this is “discretionary spending “- front suspension joints inc track rod ends , it’s every bodies call as to when there’s no fixed point or light on the dash that say replace over obvious static loose joints .

 

Just a bit of extra info, my car is 12 years old but only has 15k miles on the clock so I'm wondering what mechanical failure could occur at that mileage...
The noise is rhythmic/cyclic and goes hmmm...hmmm...hmmm... with the frequency increasing as I drive faster.

 

Maybe a hub bearing.

 

My problem was tyres after checking on hunter system. Replaced tyres and sorted.

 

Cool. Thanks for the update

 

Where do you guys get your alignment / tracking checked / done?

 

I just switched it winter tyres and the problem persists.

 

Might also get your brake rotors checked out. The conti's are pretty big, and in the event there's a warp, can mimic tire/rim/axle type vibration/noise.