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Side Louvre

Discussion in 'T3 & T4 Tech Help Clinic' started by Barry, Jun 5, 2021.

  1. Barry

    Barry Well-Known Member

    Messages:
    5,905
    Location:
    Abbotsford NSW
    Is it just me or is this a dumb design from VW.

    I don’t drive my T3 as much these days as we moved offices into the city and I have the bus (literally) at the door.
    So it parks outside in the street and it is at a slight angle.

    But WHY is the side louvre angled down so as it lets water in?
    NO weather louvre slopes down?

    But WHY do I need a louvre there? The air inlet to the filter is blocked off on the other side.
    At least the other side slopes away from the side of the car and the water can drain.

    Can you get “ears” for a T3?

    But on the passenger side the water can only pool against the side where all the seams meet.
    Drilling a drain hole won’t help as it would need to be hard up against the side.

    Every VW seems to have a stupid bit of build that would have been so easy to fix

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  2. Grantus

    Grantus Well-Known Member

    Messages:
    18,480
    Location:
    Southern ACT
    I think they are angled that way to direct airflow downwards to the engine bay when driving. :rolleyes:

    But they are def a leftover from the early air cooled motors........ ;)
     
  3. Barry

    Barry Well-Known Member

    Messages:
    5,905
    Location:
    Abbotsford NSW
    I don’t believe it would need air.
    The engine bay is open.

    Just a pain for us that don’t have covered parking
     
  4. Barry

    Barry Well-Known Member

    Messages:
    5,905
    Location:
    Abbotsford NSW
  5. Grantus

    Grantus Well-Known Member

    Messages:
    18,480
    Location:
    Southern ACT
    The engine bay is open on the water cooled models, but they are leftover from the air cooled ones, that do require the airflow.
     
  6. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,628
    Location:
    Avalon Beach NSW
    They’re still trying to be a kombi......:p
    Cheers,
    Mark
     
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  7. Maccas

    Maccas Active Member

    Messages:
    59
    Location:
    Gosford, NSW
    Interesting conundrum Barry. This topic has been conjectured about often enough before ... with no absolute finding one way or t'other.

    In answer to your first two questions above, one theory MAY well be because it's a vent outwards. Driving forward, combined radiator and engine heat under air pressure exits via underside of T3 AND as needs be, the rear passenger side "C" louvred pillar.
    One test for that theory ... is the louvre hot to the hand after driving some time and the motor having reached full operating temperature. Or else is the louvre not hot?
    Second test for that theory ... use a strip of very light, flighty fabric/tissue whatever, tie one end to a louvre and go for a drive. Does it get sucked in through the louvre or else blown out whilst driving under prevailing moving vehicle wind pressure.
    Maybe all T3 owners here could participate in doing these two tests and report back findings?

    In answer to your third question, one theory MAY be that the drivers side "C" pillar is not wanted as an outwards vent, hence it's physically blocked off. That then enables an external source of air (ideally cleaner) being pulled into the top of the "C" pillar due to engine suction via air snorkel.

    To limit/prevent corrosion to floor and adjacent body seams of passenger side "C" pillar, years ago I cleaned up this location, rust treatment if any, then applied a two pack flexible epoxy, the type commonly used in wet areas under tiles. Coincidentally, the colour of the epoxy I used was a close match to your vans off-white colour.

    So for me ever since, whether stormwater or hose washing water enters through the louvres, draining down onto the epoxied floor/seams of passenger side "C" pillar, water either drains out into engine bay area or residue lays on protective epoxy layer and evaporates. I chose not to drill a drain hole.

    Not had a rust problem in this area since. Cheers.
     
    Last edited: Jun 5, 2021
  8. Grantus

    Grantus Well-Known Member

    Messages:
    18,480
    Location:
    Southern ACT
    Errm.........”Whoosh”. ;)

    I notice on the SC & DOKA’s, they reduced the amount of vents across the rear wheel, from 3 for the aircooled ones, to 1 for the water cooled models.

    And those vents are way more “rainproof”, than the ones on the buses.

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  9. Luckyphil

    Luckyphil Well-Known Member

    Messages:
    7,018
    Location:
    Gosford
    I believe they to let cooling air in on the drivers side and to let hot air out on the passenger side. I have had similar thoughts to how to fix the problem. The best I could come up with is a cover made of vinyl or canvas that is held in place with magnets when parked. However then you would need to remember to put them on and more importantly take them off when driving but I think they would solve the problem.
     
  10. Grantus

    Grantus Well-Known Member

    Messages:
    18,480
    Location:
    Southern ACT
    If they were symmetrical, you could mount them upside down, to deflect rain to the outside...................... but they are not symmetrical. :(
     
  11. Wattie

    Wattie Well-Known Member

    Messages:
    1,276
    Location:
    Mildura. Victoria. Australia.
    I made a set for my van the main problem was careless people knocking and breaking them :mad: gave up after the third fix. :(
    Fabricated Air Scoops  (1)R.jpg Fabricated Air Scoops  (2)R.jpg
     
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  12. Grantus

    Grantus Well-Known Member

    Messages:
    18,480
    Location:
    Southern ACT
    We’re they to increase airflow to the suby donk, rather than to stop rain when parked? :rolleyes:
     
  13. AC-T3

    AC-T3 Well-Known Member

    Messages:
    1,101
    Location:
    Woy Woy
    As Grantus said. Best remember the original 1980 T3 design was air cooled. The engine compartment was sealed and cooling air for the Type 4 an essential requirement, hence the louver design left and right. With the introduction of water cooled power, the engine bay was opened BUT became dusty and dirty so the air intake snorkel was added. Sort of obvious, no ????
     
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  14. Wattie

    Wattie Well-Known Member

    Messages:
    1,276
    Location:
    Mildura. Victoria. Australia.
    A long story Grant, from the beginning the subi had oil, coolant and alternator overheat problems, took 2 summers to sort.
    The vent scoops were just one of many trials that did not work.
     
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  15. Maccas

    Maccas Active Member

    Messages:
    59
    Location:
    Gosford, NSW
    Physics dictate the passenger side rear pillar is a chimney. Fundamental function of a chimney is to pull heated air up, then exhaust.
    Compare that with the same physical functionality of a lit fireplace in a home.
    Exactly the same.
     
  16. Barry

    Barry Well-Known Member

    Messages:
    5,905
    Location:
    Abbotsford NSW
    Where to post?
    T3 Tech Help?
    What did you do to your kombi today?
    Members Rides?

    Looks like here.

    Well, my Campervan Culture / T3 Technique “ears” turned up today.
    Fairly easy to install except for the rear louvre screw. Reckon you use a ratchet flexible screw driver. Yeah, right.
    I have a bit of packing at the back till I work out a better way. More thinking a bolt fixed to where the screw goes and then get a wing nut in there.
    https://t3technique.com/media/pdf/Bullihutzen installation instructions.pdf
    They conveniently show how to do it up with the ear off.
    They also said to glue the top pieces together.
    I am an impatient bugger and used a small pop rivet where the pegs go

    Whatever....... they are on.

    Should keep the water out at least.
    Happy with the look. Don’t think I will paint them.
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  17. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,628
    Location:
    Avalon Beach NSW
    A black permanent marker will fix that….;)
    Cheers,
    Mark
     
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  18. Barry

    Barry Well-Known Member

    Messages:
    5,905
    Location:
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    Was more thinking if I should paint them white?

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  19. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,628
    Location:
    Avalon Beach NSW
    Doh ! :rolleyes:
    I like ‘em black……goes with the wheels…..
    Cheers,
    Mark
     
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  20. Barry

    Barry Well-Known Member

    Messages:
    5,905
    Location:
    Abbotsford NSW
    You can’t see the pop rivets as is. They are too far in.
    If anything I might run a “filling” bead of black silicone round the side.
    That will help with the fixing and stop any water coming off the gutter at the back and running in from there
     
    Last edited: Jul 25, 2021
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