Vibration and knock **Update**

[dom]

Right, not often a create a thread like this anymore but I've got an issue that's doing my head in.

I've had a dull knock on the front o/s for a few months now, it's not getting any louder or worse but is annoying me. In addition to this the car has also developed a vibration which is even more annoying.

- The vibration is felt throughout the car, steering wheel, pedals, armrest etc.
- It doesn't get worse with speed.
- It does it under braking.
- There is also vibration on idle (although there has been since I polybushed my dogbone mount.
- There is no change in vibration if turning in either direction.

Over the last few months the car has had brand new:

- Wishbones/bushes/ball/joints
- Inner tie rods/ends
- Wheel bearings
- Inner/outer cv's
- 4 Wheel laser alignment.
- New bags/topmounts

I'm pretty clueless as to what else it could be, I'm thinking possibly an upper engine mount?

Anyone got any thoughts as to what it could be?

[topher]

have you banged the driveshaft on the chassis on that side and put it out of balance maybe?

[52GTIPETE]

As you stand at the front of your car check the engine mount to the far left by your power steering bottle. Check that the mount is central. If you remove the power steering bottle you will get a better look.

[dom]

have you banged the driveshaft on the chassis on that side and put it out of balance maybe?

It's possible but I'm notched so I doubt it. The driveshaft was off to replace a leaky gearbox seal last week though

As you stand at the front of your car check the engine mount to the far left by your power steering bottle. Check that the mount is central. If you remove the power steering bottle you will get a better look.

I'll have a look later, I've got spare engine mounts in the shed but need to get some new bolts.

[dom]

Also worth mentioning that the retaining screw for the brake disc has sheared off:



This shouldn't make a difference though should it? As it's only used to locate the disc for fitting wheels.

[mcgee9t2]

yeah that shouldnt make a difference, wheel nuts will hold it on, i sheard mine off on the old car,

[xxChrisxx]

have you banged the driveshaft on the chassis on that side and put it out of balance maybe?

DIFFERENTIAL DIAGNOSIS!

Out of balance vibration would always get worse with speed.

[XMC1980]

You ever find out what this was Dom?

[dom]

You ever find out what this was Dom?

I've not had a chance to look at it properly yet, I suspect it's mount related, possibly even dogbone. I half polybushed it a couple of years ago and it's possible the rubber bush that's left has been destroyed.

[AD1.8T]

I would almost put money on it it your front shocks are knackered ! A lad ive got on facebook has airlift bags and theyve had it after a year.