Lowering my Corsa C 1,8 sport

[Onno]

Hello,

I hope you don't mind that I write in English but my German is not that well. (neather is my english but I'll give it a try anyway)

Last friday I lowered my car with Eibach Sportkit 30mm front and rear.
I combined the sportkit with the 'federteller' from Bonrath.
These lower the front of car 10mm extra.
Now there is a strange vibration in the car and I can't find out what it is.
Is it possible that the driveshafts need to be replaced with shorter ones or is 40mm lowering usually not a problem ?

I hope you are willing to help me with this problem.

Best regards,

Onno

By the way, is there a topic where i can intoduce myself to you all ?

[Theux]

I don't think, that the driveshafts are the problem. When there are 30mm springs in your car, they you can use yor old driveshafts. Up to 40mm there is no problem. When you are lower than 40mm, then you should take shorter ones.

But the best way always ist to use undercarriage kit, than you don't have any problems.

[Onno]

Thanks for the quick reply.

Can you tell me if the answer you gave me is general or specific for the Corsa C ? I had serveral lowered cars before and never had any problem with driveshafts or so.
I was very surprised by the fact that this time a vibration is the result.

Any other 'defect' that can couse these vibrations ?

Best regards,

Onno

[Picmasta]

Perhaps you have the vibrations, because of the 'federteller' from Bonrath. Are the Springs still long enough, or can you move them up and down a little bit? You sometime get Problems with 'federteller' an shorter Springs, because they start moving.

Greetz Pic

[Onno]

I can't move the springs up or down. When I mounted the springs and 'federteller' I checked this by 'pulling' the spring up and down and they couldn't move up or down.
When I shortened the spring with my hands I could move the springs in the 'federteller' from left to rigth a little but when I let them go they jumped into the right positon.

[Tuning World]

Hi,

try to replace the Bonrath "Federteller" with your original parts.

in some cars you have this problem with theese "federteller" and vibrations.

[JJ.Maverick]

hi,
sometimes the bonrath-thing is grinding on the top of the "Springhouse".

[Onno]

The 'federteller' can't grind the 'springhouse' because it is not mounted near that.
Not the complete top plate is replaced by the bonrath-thing.
The top plate is combined out of 2 parts. One part (the one the spring fits in) is replaced. The other (original part) comes on top of that. That one is in contact with the 'springhouse'. The two parts are seperated from eachother with a bearing.

original from top to bottom:
1. Big rubber round block
2. The plate the spring fits in (dirtcap is part of this)
3. The spring

Now from top to bottom:
1. Big rubber round block
2. Bearing
3. Bonrath-thing
4. Spring

The Bonrath-set came with a new dirtcap that is mounted over the shaft of the shockabsorber en fits between the bumbstop and the bonrath-thing.


I checked the driveshafts if they can move. On one side I could move it a little on the other side I couldn't. By moving I mean in and out of gearbox. Should they be able to move or schouldn't they ?

I had several problems with the gearbox (and other parts) before and there has always been a small vibration in the car the dealer can't solve (My lawyer is preparing a lawsuite against the dealer and Opel Nederland).

Is it possible that because the car is stiffer now I just notice it more ?

[Onno]

Just want 2 say I really appriciate the afford you all do or did to try and help me !

[JJ.Maverick]

hi

are u sure, that the vibration came only from the springside?

it looks like an open screw or anything else.

are the vibrations only at fast drive or even in very slow driving?

have u controlled the track from ur tires?

sorry for this simple questions.