lightning
Well-Known Member
I always noticed the extra din when l opened the vent flaps (on my 2005 110 TD5)
l fitted self adhesive "D" seal at the back of the bonnet and what a difference for £5
Now, when l open the vent flaps the noise level barely changes, and with them closed it's around 3db quieter at 65mph than before (measured with a decibel meter near the dashboard)
Down from 84-85db to 80-81db which is quite a difference.
The difference measured at ear level is less, but every little helps.
Well worth doing, there is a seal on the scuttle but the bonnet doesn't actually touch it so plenty of engine noise gets through.
l fitted self adhesive "D" seal at the back of the bonnet and what a difference for £5
Now, when l open the vent flaps the noise level barely changes, and with them closed it's around 3db quieter at 65mph than before (measured with a decibel meter near the dashboard)
Down from 84-85db to 80-81db which is quite a difference.
The difference measured at ear level is less, but every little helps.
Well worth doing, there is a seal on the scuttle but the bonnet doesn't actually touch it so plenty of engine noise gets through.
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