Posted this in the astra H section of another astra network but thought I'd maximise my chances and also take part in discussions here as I officialy own an Astra H so here goes.
I've got a huge steering shake problem, around 70 MPH the car likes to rotate the steering wheel left/right almost as if the road surface has an effect on the steering wheel causing it to go left/right violently and intensively.
Car : astra cdti 1.7 55 reg
Wheels: Team Dynamics Pro Race 1.2 with Accelera High Performance 40 profile tyres.
The wheels are 5 nut and have Spigot rings, known to be the right size for Astra 04+ which includes my astra 05.
Had my Balancing 3 times! each balance made a slightly better difference but each time they went for a re-balance they were out by 5-30 grams each time ( machines at different sensetivities? maybe I should ask them to go 'finest' ?)
Increasing speed does not make the problem go away and cannot drive through it!
No bad effect or vibration from 1-69mph... happens at 70+.
I've looked into the possibile dangers of this and the consiquences can be fatal and life threatening to me and everyone else if I was to ignore this.
I'm only left with the following options:
a. Lug based balancing? mount a plate 5 lugs and balance the wheel like that?
b. On car balancing (is that still around)?
c. Have the spigot rings firmly put on the wheel before mountaing to hub? Spigot rings were left on the hub when the wheels got balanced and then they put them back on the hub with the spigot rings not taken off and put firmly on the wheel? I heard that they need clipping firmly into the wheel before trying to marry the wheel to the hub as the ring is so important it can cause an out of balance and throw steering all over the place!
d. check tyres but i dont see how they'd cause vibration at 70mph+ and not anything lower?
e. balance again , but this has been done so many times that i think the wheel wants to puke weights.
Any ideas? Appreciated.
Note: tyres and alloys are brand new and problem occurred as soon as they were put on ,never had a smooth drive on any surface always get wobbles, nearly died on the m54 each part of that road nearly throws my car into the barriers so have to grip the wheel with dear life and if i persistantly kept driving that road and took a second to look at my mirrors id probably be into a barrier... bad bad bad bad!!!!! Do not want to drive on the m54 until this is fixed, had to delay my plans this weekend for my own safety and my friends.