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CJChopz
Samba Member
Joined: April 18, 2017
Posts: 3
Location: Brisbane, QLD, Australia
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 Posted: Wed Oct 02, 2024 6:36 am Post subject: Doka Cabin Pressure Relief Vents |
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G'day everyone,
After lurking for many years I figured I should finally post something 
I've been doing some research, to put into my 1990 Doka's ("Duke") project diary, regarding reduction of wind noise. Of course one of the many things that has come up is the two wind noise reduction seals on the A-piller that was installed on the higher end vans post-'88.
Disregarding how much of a PitA to find and install a set if going to be, the problem that arises is the loss of the cabin air flow-through vents in the doors. Being a Doka I can't just throw the late vents into the rear windows so does anyone know of a solution? Did any of the TriStar's come with the seals in the front doors?
Cheers! |
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zerotofifty
Samba Member
Joined: December 27, 2003
Posts: 3774
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| Posted: Wed Oct 02, 2024 7:59 am Post subject: Re: Doka Cabin Pressure Relief Vents |
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| open a window? |
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4Gears4Tires
Samba Member
Joined: October 08, 2018
Posts: 4217
Location: MD
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| Posted: Wed Oct 02, 2024 9:38 am Post subject: Re: Doka Cabin Pressure Relief Vents |
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I can't believe any Vanagon is so well sealed that this an issue.
I would have to see measured results before I believe it.
_________________
'87 Syncro Ferric Oxyhydroxide Superleggera Edition
'85 Westy Sciuridae Domus Edition |
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Wellington
Samba Member
Joined: September 21, 2004
Posts: 2000
Location: Montreal
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| Posted: Wed Oct 02, 2024 10:13 am Post subject: Re: Doka Cabin Pressure Relief Vents |
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Not what you want, but along the same lines:
Noise reduction, I think a majority of it is generated from the rain gutters running along side the windshield.
Way back I remember Jettas having a plastic trim from the aftermarket that snapped on the gutter, and went across to the windshield, ran down both sides and reduced wing noise. |
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do.dah
Samba Member
Joined: August 27, 2015
Posts: 799
Location: Washington
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| Posted: Wed Oct 02, 2024 10:05 pm Post subject: Re: Doka Cabin Pressure Relief Vents |
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| Wellington wrote: |
Not what you want, but along the same lines:
Noise reduction, I think a majority of it is generated from the rain gutters running along side the windshield.
Way back I remember Jettas having a plastic trim from the aftermarket that snapped on the gutter, and went across to the windshield, ran down both sides and reduced wing noise. |
I agree with this.
For the life of me, can't figure why VW put those gutters on the side of the windshield.
I've heard of people cutting them off.
I'm averse to doing so.
Though, I think there's benefits to cutting them off, since I find that snow didn't tend to slide off the side when using the wipers.
So, what I do, as a big believer in the philosophy of the "Red Green show",,, I went and bought a roll of high grade black duct tape and ran it the length of the gutters.
Snow slides off the sides now, I haven't butchered my van anymore than I needed to, only hafta replace the duct tape every few years, and since my van came with black trim, it's not very noticeable, and it seems like it's quieter.
YMMV. |
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CJChopz
Samba Member
Joined: April 18, 2017
Posts: 3
Location: Brisbane, QLD, Australia
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| Posted: Fri Oct 04, 2024 4:48 am Post subject: Re: Doka Cabin Pressure Relief Vents |
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| do.dah wrote: |
| Wellington wrote: |
Not what you want, but along the same lines:
Noise reduction, I think a majority of it is generated from the rain gutters running along side the windshield.
Way back I remember Jettas having a plastic trim from the aftermarket that snapped on the gutter, and went across to the windshield, ran down both sides and reduced wing noise. |
I agree with this.
For the life of me, can't figure why VW put those gutters on the side of the windshield.
I've heard of people cutting them off.
I'm averse to doing so.
Though, I think there's benefits to cutting them off, since I find that snow didn't tend to slide off the side when using the wipers.
So, what I do, as a big believer in the philosophy of the "Red Green show",,, I went and bought a roll of high grade black duct tape and ran it the length of the gutters.
Snow slides off the sides now, I haven't butchered my van anymore than I needed to, only hafta replace the duct tape every few years, and since my van came with black trim, it's not very noticeable, and it seems like it's quieter.
YMMV. |
I have a black plastic trim piece running down these but it’s little more than a skin, I can’t image it does much. I don’t think cutting the gutters would be necessary for me, don’t get much snow here in Queensland, Australia haha.
It’s actually the heat and humidity that I’m concerned about, ensuring that I have flow-through ventilation, not so much the pressure relief aspect. Most modern vehicles have flow through ventilation vents in some form. Can’t get fresh air into the car into the car if the stale air can’t get out.
I’m considering adding some vent’s behind the rear seat into the cargo area under the tray, hopefully it might be enough but won’t introduce any noise or smells.
I’d love to know if the late TriStar’s had a solution. |
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4Gears4Tires
Samba Member
Joined: October 08, 2018
Posts: 4217
Location: MD
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| Posted: Fri Oct 04, 2024 6:48 am Post subject: Re: Doka Cabin Pressure Relief Vents |
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Is there something about the Doka's that is crazy different from the vans? Because honestly this is the first thread I've ever seen where someone wanted to increase air flow. Opening my vanistan front air flap is a massive amount of air through the van, I usually keep it closed or mostly closed. And this is with the rest of the windows closed.
_________________
'87 Syncro Ferric Oxyhydroxide Superleggera Edition
'85 Westy Sciuridae Domus Edition |
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MsTaboo 
Samba Member
Joined: June 02, 2006
Posts: 4549
Location: East Kootenay, British Columbia
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| Posted: Fri Oct 04, 2024 11:43 am Post subject: Re: Doka Cabin Pressure Relief Vents |
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| CJChopz wrote: |
G'day everyone,
After lurking for many years I figured I should finally post something
I've been doing some research, to put into my 1990 Doka's ("Duke") project diary, regarding reduction of wind noise. Of course one of the many things that has come up is the two wind noise reduction seals on the A-piller that was installed on the higher end vans post-'88.
Disregarding how much of a PitA to find and install a set if going to be, the problem that arises is the loss of the cabin air flow-through vents in the doors. Being a Doka I can't just throw the late vents into the rear windows so does anyone know of a solution? Did any of the TriStar's come with the seals in the front doors?
Cheers! |
My '89 Syncro Tristar did not have the extra wind noise reduction seals that my '90 Syncro Westy has.
However, I don't see adding the seals to your '90 Doka would be a problem. The door vents would still work as the air passes through the vent and into the area around the window. I believe the vents were only meant to relieve pressure as the door was shut, not as fresh air venting.
Also the Doka has air vents at the rear of the cabin on the C pillar (or are those only to vent the treasure chest? I no longer own a Doka so can't check).
VW only eliminated the door vent after they added the rear window vents to increase airflow to the rear of the cabin.
_________________
Currently:
'90 Syncro Westy 3 knob w/Zetec
The information age has morphed into the age of disinformation and willful ignorance. Agnotology!
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hdenter
Samba Member
Joined: October 14, 2008
Posts: 2940
Location: San Luis Obispo, CA
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| Posted: Fri Oct 04, 2024 4:34 pm Post subject: Re: Doka Cabin Pressure Relief Vents |
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My '84 has newer seals on all doors. With the windows closed, which ever door is closed last has to be closed firmly. If not, the air pressure in the car will keep the latch from engaging fully. I always thought the extra seals on the front doors of the later vans was to prevent wind noise, not correct a ventilation problem.
Hans
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'79 triple white convertible bug
'84 sunroof vanagon
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MsTaboo
Samba Member
Joined: June 02, 2006
Posts: 4549
Location: East Kootenay, British Columbia
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| Posted: Sat Oct 05, 2024 11:48 am Post subject: Re: Doka Cabin Pressure Relief Vents |
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| hdenter wrote: |
| My '84 has newer seals on all doors. With the windows closed, which ever door is closed last has to be closed firmly. If not, the air pressure in the car will keep the latch from engaging fully. I always thought the extra seals on the front doors of the later vans was to prevent wind noise, not correct a ventilation problem.Hans |
That's the general consensus.
_________________
Currently:
'90 Syncro Westy 3 knob w/Zetec
The information age has morphed into the age of disinformation and willful ignorance. Agnotology!
All that's needed for evil to prevail is for good people to do nothing.
Resist Kleptocratic Oligarchy (and Idiocracy)! |
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