New Gen4 Snorkel

Experiment over. No discernable difference noted between on or off.

Roger

Thanks Roger,  that is good to know.

At lunch time I went and wedged a strip of rubber in the location Bravo have suggested, so will try that out in a bit.

Just a quick update, I did add a rubber strip in the area shown above. It does seem to have made an improvement. I would say it is about 50% to 60% better. The noise doesn't seem to start quite so soon as it did and is less intense when it does occur.

I will try adjusting the rubber strip to see if I can improve it even more.

A bit late posting this up, but I've still been unwell, so only gotten around to doing this today.

Bravo Snorkel's suggested adding some rubber to isolate the snorkel.

I did have a look last weekend and as you can see, the snorkel does just make contact in this area:




There is a small amount of play if you rock the snorkel back and forth here. So I found some spare door deal and cut a slip of rubber out. I undid the bolts holding the snorkel onto the wing and managed to squeeze some rubber into this area.




And tightened everything back up.


I'm pleased to report that is has made a positive impact to the noise. It hasn't eliminated it. But it is less harsh and has removed a lot of the vibration from the pedals. The noise also seems to happen over a smaller rev range now.

My working theory is. The noise is still a harmonic resonance due to the internal shape of the snorkel. But due to the snorkel vibrating and rubbing on this part of the body it was making it louder and causing vibrations within the vehicle. The rubber is just dampening and isolating the snorkel from the metal work, hence the improvement.

I do wonder if at some point I need to lift the entire snorkel out. If you wiggle it up and down you can hear it still impacts something.



Maybe some rubber foam under it would be the next step. But it does mean taking the bonnet off again, so this will be a job for another day.

Your results seem similar to mine, although mine does not look like it is contacting where yours does. I have added an extra cable tie to the pipe as well, but haven't been out to test that yet.

wrote:

Just a quick update, I did add a rubber strip in the area shown above. It does seem to have made an improvement. I would say it is about 50% to 60% better. The noise doesn't seem to start quite so soon as it did and is less intense when it does occur.

I will try adjusting the rubber strip to see if I can improve it even more.

Just to add to my previous update.
I have adjusted to rubber and managed to get it pushed down further with the aid of some WD40. I also added an extra cable tie to the flexi-pipe at the brake fluid reservoir, as the pipe did rattle against it.

For me this seems to have solved the problem of the harsh vibration. I am happy with the way it is now.