Hello guys! I’m in search of a wiser men who could show me the way of a possible cause/solution. First a few words about the car and the state of it. Its got roughly 110k km and in the last 10k it had recieved a cam belt change, flywheel, clutch, a/c compressor, new engine/gearbox mount with a m12 bolt (precaution),. It was running great but then i decided for Eibach lowering springs with spacers (18mm + 7mm) and at first it was driving normal. In the last week a noticed that at hard acceleration from 4k rpm onwards i get a vibration which as the driver i mostly feel through the steering wheel. Driving normal without flooring it, at highway speeds i dont feel any vibration, no vibration at idle, no knocks or anything. From reading through the forums the possible causes are cv joints and engine mounts(dog bone). I would be gratefull if someone could give there view on this situation because i dont want to just throw parts at the car. Thnx
your 18mm drop is very little but am inclined to still think its CV joints, at 110km (70k miles) maybe think about fitting new shafts anyway. they're relatively cheap to replace
Firstly start at the beginning, have you had your alignment re-done after changing any suspension components?
After changing the springs i did wait for 2 weeks for the car to settle then i made the alignment. Yesterday i was cruising on the highway at 130km/h and there is no vibration, only if i start to push the car into higher RPM's. Occasionally i can rev it without any vibration, it seems that it is speed related and i think i get more vibration through the steering if i accelerate through a corner.
has the alignment been done correctly? I see so many places not being able to do the basics these days. I myself have had it done a few places and had this. check all wheels see if any signs of weights that have fallen off. How are the rear calipers? they move freely? does this vibration occur when braking at all? It might be worth a look at the hub bearings too Ive had similar symptoms when one bearing was loose but it was mk2.
from the spreadsheet that i received and the fact that the car is going straight i think they've done their job . I checked the rear calipers and the move freely (have some play in them) so i assume they are not sticking and there is also no vibration when braking. Today i will jack the car and feel for wheel play. I'm tempted to go for a tire realignment but i think it's not the cause.
I think some places offer a free alignment check. could be worth it even if its going straight a free check wouldnt be any harm. check inside of wheels for weights that could have fallen off, wheel balancing can cause vibration at high speeds
I would check also wheels and tyres. Tyres could be bony (angular) on the inside. And check also the exhaust brackets and clips. There could be a force somewhere due to disassembling the exhaust when changing the clutch.
This might be of interest, had exact same vibration when accelerating and then recently replaced both drive shafts. Result: zero vibration
