Oscillating hum/ from inside the cabin

[SuperV8]

I think the torque setting makes a difference, I fitted it without a torque wrench the day before and just guessed, went out for a drive and didn't notice much of a difference. The next day the wrench arrived from Amazon and I checked how tight the bolts were and I ended up having to loosen them to 18nm. Went out for another drive and noticed the difference right away. The part has a rubber centre that may need time to become supple to absorb the vibrations, maybe the rubber was touching the frame, or too tight to absorb vibration correctly.

The part has a metal centre which it what the bolts/nuts tighten.
So you're saying - initially you had them tighter than 18nm and didn't notice any difference! But dropped the torque DOWN to 18 it DID notice a difference?
Strange!

 

[PodDogSki]

Yeah I guess so, the metal centre pulls the rubber towards the chassis when tightened as the rubber is attached to the metal, maybe if its too tight the rubber cant provide enough movement to the weight. Maybe I didn't alight it correctly the first time I installed the part.