Violent front end shaking

[cliovirgin]

Need help please guys ! Above 3500 revs, my car is shaking to bits. The massive vibrations are felt through the steering,peddles and chassis. What can be causing this ?????

 

[Legend@wheels]

While you braking?

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[Yiannis197]

Damaged engine mounts?

 

[CallorFold]

Check the wheels - buckled maybe? hit any big potholes?

Might be wheel alignment/balancing.

 

[Sean197]

Sounds like a mount has broken. You could jack it up and get underneath but it's really best to get it on a ramp.

 

[cliovirgin]

NO. The brakes are fine, all brand new, and fully refurbed calipers.

 

[cliovirgin]

Gearbox,and torque mounts fine/ newish. The top engine mount has just been changed, but has not cured things.

 

[cliovirgin]

All balanced yet again, to make sure not the problem, no,not helped. Steering is spot on, car never wanders.Avoid potholes like the plague !!!!

 

[cliovirgin]

As above no. Been on and off ramps for past few weeks.

 

[Sean197]

Have you checked the exhaust manifold? Driveshaft is another possibility - check the shafts and also the hub nuts.

 

[cliovirgin]

Sorry, but forgot to insert quotes on the above.

 

[cliovirgin]

Have you checked the exhaust manifold? Driveshaft is another possibility - check the shafts and also the hub nuts.

Manifold, ????, don't think is the problem. Yep new N/S driveshaft replaced, O/S is ok, not cured.Hub nuts and discs checked, all are fine.

 

[John Gordon]

When you say it starts at 3500 RPM, do you mean it does it when standing still, just revving the engine causes it, or is it road speed related?

 

[cliovirgin]

When you say it starts at 3500 RPM, do you mean it does it when standing still, just revving the engine causes it, or is it road speed related?

Yes whilst on the move.

 

[John Gordon]

Only thing I can think of thats not been mentioned is diff bearings. But it sounds too violent to be that.

 

[cliovirgin]

Only thing I can think of thats not been mentioned is diff bearings. But it sounds too violent to be that.

That is one of the thoughts we've had. Still after other possible causes ?

 

[cliovirgin]

Still awaiting some hardcore advice ! Could something be wrong engine wise or the flywheel perhaps ?
Have recently had slight misfire. sorted with new knock sensor after reading the fault codes. That had caused engine vibrations, which may have in turn caused this problem ? The car is undrivable,both these things happened a week or so after fitting new discs,pads,calipers refurbed and clutch bleed. Don't think is related, as all seems fine.

 

[skmaxwell.sm]

Engine mounts or a cut and shut

 

[cliovirgin]

Engine mounts or a cut and shut

Mounts are done/ ok. Had car for nearly 2 years, so don't think so.

 

[CallorFold]

Manifold/exhaust pressure somewhere? If it's got a hole or seals have gone or something like that it could probably cause vibration?