S-type direction change ?

[stypeboycornwall]

Hi.

I have a 2007  2.7 Diesel S-type.  I noticed while away last week that when driving on the motorway the car would ever so slightly change direction when Decelerating and then acceleration.

I recently had a brake vibration that turned out to be warped disc and I had the front end checked out at the same time so I am fairly confident its nothing to do with the front end,

any ideas anyone ?

[Mr Lawrence]

Check the rear sway bars. 

I had that problem last year and it turned out to be a worn sway bar.

new ones and a 4 way tracking check sorted it. 

[JOE-DOT-COM]

Hi

Get the bushes checked, when they go soft you can get a lot of movement which alter the car geometry

at a guess, with you saying it does it under acceleration and deceleration, its going to be a rear, the drive through the rear wheels is causing the wheel to alter

and its only going to be one wheel causing it to steer, if both did it, they would cancel each other out, also check the rear tie rods, these do wear and would cause the wheel to steer if there play

but I'd get the bushes and ball joints checked

uneven tyre wear might also be caused by this as well

cheers

Joe

[Lazlo Woodbine]

My car is doing just this but with added wobble on the overrun and when cornering, it's wear in the rear suspension. I replaced the track rods the other week as the outer ends on both were knackered but didn't properly track it as I knew I'd be changing the lower rear arm bushes which are also done for. In fact I finished re-bushing my spare arms half an hour ago, ready to fit tomorrow.

If you jack the back end up with the handbrake off you could probably feel untoward movement by wrenching the wheels around. There are some bushes at the rear that are actually ball-joints with dust seals which can split and let the grease out, then the "bush" is on borrowed time and will wear out very quickly. A couple of mine had done this and the others had just worn out.

Whereabouts in Kernow be you?

[stypeboycornwall]

On ‎29‎/‎05‎/‎2017 at 6:13 PM, JOE-DOT-COM said:

Hi

Get the bushes checked, when they go soft you can get a lot of movement which alter the car geometry

at a guess, with you saying it does it under acceleration and deceleration, its going to be a rear, the drive through the rear wheels is causing the wheel to alter

and its only going to be one wheel causing it to steer, if both did it, they would cancel each other out, also check the rear tie rods, these do wear and would cause the wheel to steer if there play

but I'd get the bushes and ball joints checked

uneven tyre wear might also be caused by this as well

cheers

Joe

Thanks Joe .

 

Seems to be common fault,  Got car booked in week after next to look at bushes.

 

Regards Chris

[stypeboycornwall]

On ‎29‎/‎05‎/‎2017 at 6:53 PM, Lazlo Woodbine said:

My car is doing just this but with added wobble on the overrun and when cornering, it's wear in the rear suspension. I replaced the track rods the other week as the outer ends on both were knackered but didn't properly track it as I knew I'd be changing the lower rear arm bushes which are also done for. In fact I finished re-bushing my spare arms half an hour ago, ready to fit tomorrow.

If you jack the back end up with the handbrake off you could probably feel untoward movement by wrenching the wheels around. There are some bushes at the rear that are actually ball-joints with dust seals which can split and let the grease out, then the "bush" is on borrowed time and will wear out very quickly. A couple of mine had done this and the others had just worn out.

Whereabouts in Kernow be you?

Thanks.

 

Seems to be common fault Got car booked in week after next to look at bushes.

I am in Gunnislake.

 

Regards Chris

[stypeboycornwall]

On ‎29‎/‎05‎/‎2017 at 4:42 PM, Andy the tyre man said:

Check the rear sway bars. 

I had that problem last year and it turned out to be a worn sway bar.

new ones and a 4 way tracking check sorted it. 

Thanks tyre man

 

Seems to be common fault Got car booked in week after next to look at bushes and will check sway bars at same time

 

Regards Chris

[Lazlo Woodbine]

Make sure they have a proper and thorough look with a pry bar as those lower arm bushes can be a bit sneaky and not seem half as bad at a casual glance as they really are. Like all ball-joints they can wear out from one particular arc of motion, giving lots of play in use, and yet with load from another direction be just fine.

I'm just up the road, Launceston.

 

[Mr Lawrence]

My sway bar problem showed up on the mot last year.

i knew something was wrong as it had the symptoms you described but as it was the O/Side one it was more pronounced when turning right on a sweeping bend. 

On the mot it was a check of the side to side wheel movement that found it. 

A pair of bars for about £35 each off eBay sorted it out. 

Also, tyre pressures upped stopped any wayward movement too as I carry a mobility scooter in the boot more often than not.

 

[stypeboycornwall]

On ‎29‎/‎05‎/‎2017 at 4:22 PM, stypeboycornwall said:

All sorted now,  Nearside sway bar ball joint was worn out.

thanks to all for your comments much appreciated

On ‎29‎/‎05‎/‎2017 at 4:22 PM, stypeboycornwall said:

I have a 2007  2.7 Diesel S-type.  I noticed while away last week that when driving on the motorway the car would ever so slightly change direction when Decelerating and then acceleration.

I recently had a brake vibration that turned out to be warped disc and I had the front end checked out at the same time so I am fairly confident its nothing to do with the front end,

any ideas anyone ?