Any tips on quietening a Ducato cab?

[Bertilak]

Whilst I frequently live with minor tinnitus, I'm finding I get it a lot worse after driving the Fiat PVC for an hour or more. (2016 2.3 ex-delivery van)
It doesn't seem noisy, apart from getting Jan to not talk quietly, but I'm very aware of it afterwards. It seems mainly coming from the front, like it's engine or road noise, though there is a little wind noise from the boxy skylight behind us.

So has anyone any tips on improving the vehicle's sound proofing: extra places to stick sound deadening etc? I've also got a source of 50mm acoustic foam, if I can find where to stick it.
I think I've read there are open slam vents under the floor (not needed without a bulkhead) that could be blocked off, and that the battery compartment allows sound in. Any others?
Fresh air intake? Door skins?

Ye, I could wear ear plugs for long runs, however I'm also trying to maintain some togetherness, where this appears rather counter-productive

 

[Jev88]

Stick back sound deadening material on inside of every dash panel you can get off. Inside door card or against outer door skin and check carpet thickness in cab.
There is also a rubber strip you can often use between bottom of windscreen and dash.

 

[Jez1966]

Several Youtube video of DIY PVC builds. "ducato van sound deadening"
Not watched so no clue if the put anything in the cab or what you already have installed elsewhere.
Our Kon-Tiki 599 seem "quiet" enough but that may just be that it's our first van and we don't know better.

 

[Otter Spotter]

Sound deadening some insulation behind the door panels. I have also put wall carpet on the parcel shelf above head and if your has it, the larger shelf above your head. Behind the plastic floor panels behind the pedals you can put some insulation matting and whilst your at it, put an extension to the heater pipe that lies behind the clutch pedal panel. If you extend it your left leg will not be as cold in winter !
Also consider a pair of loops they are ear plugs which lower the volume of sound but Don stop you hearing conversation etc. https://www.loopearplugs.com/produc...VUys3hAJj9y0-tlcJGq8Y7klyOrDzDcBoCA1EQAvD_BwE

They really work for my tinnitus and are safe to drive with them in.

 

[POH]

Hi , the slam vents under the floor can be blocked off you can buy them from fiat not cheap for what they are , I blocked mine off to try to reduce the draught coming through the seat belt slots but not really worked, don't know about battery compartment. Good luck

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[L' Hobo]

Whilst I frequently live with minor tinnitus, I'm finding I get it a lot worse after driving the Fiat PVC for an hour or more. (2016 2.3 ex-delivery van)
It doesn't seem noisy, apart from getting Jan to not talk quietly, but I'm very aware of it afterwards. It seems mainly coming from the front, like it's engine or road noise, though there is a little wind noise from the boxy skylight behind us.

So has anyone any tips on improving the vehicle's sound proofing: extra places to stick sound deadening etc? I've also got a source of 50mm acoustic foam, if I can find where to stick it.
I think I've read there are open slam vents under the floor (not needed without a bulkhead) that could be blocked off, and that the battery compartment allows sound in. Any others?
Fresh air intake? Door skins?

Ye, I could wear ear plugs for long runs, however I'm also trying to maintain some togetherness, where this appears rather counter-productive

When I worked on heavy diesels, we had earplugs that reduced the noise but still allowed us to hear speech, perhaps it worth investigating if all else fails?

PS never had noise problems with my Murvi PVC, might be worth seeing what they used?

 

[LithiumConvert]

For reasons totally unrelated, I have recently had the carpet and battery cover off our 2022 Hymer and I was very much aware (and surprised) just how noisy the vehicle was.

So, my suggestion is that you make sure that the battery cover is fitting properly and then put some carpet down in the cab. Maybe, the carpet supplied by Hymer is chosen for its sound proofing. But it certainly works.

We also have carpet in the back, which I would also suggest is worth considering.

 

[Jez1966]

Our Kon-Tiki 599 on Ducato Alko Chassis
Sound deadening in engine bay, it would seem odd if different levels applied by Fiat during manufacture though.
Bonnet

Bulkhead


Cab floor - Plastic mat though it looks to be backed in someway but can't see.
Not pattern if yours has the same?

 

[Bertilak]

Thanks all, whilst I've got some OE damping material, it does seem pretty minimal. I think I'm going to work on the cab floor, inc blocking the vents and battery lid; and scuttle where I can; plus the holes through the scuttle, i.e. the fresh air intake, immediately above the engine! And get into the doors...
For the diesel experts: does most of the noise come from airborne noise from combustion, from the injectors, or transmitted through the pipes and mounts?