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  Astra SRI/ Hornet
i have 172 cup with a vibration/rattle coming from the front, underneath the car. i have looked at the bearings, strut top mounts, and engine mount, but nothing seems loose. any ideas?



ClioSport Club Member
  E92 M3,172 track car
Maybe manifold hitting the subframe. Try loosening the top left engine mount and pulling the engine forward.

May also be strut tops knocking although you have said you checked those.. Search for 'Strut top washers', plenty of info' in there..