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Sliding door popping open

Discussion in 'T3 & T4 Tech Help Clinic' started by Caravelle85, Jan 19, 2019.

  1. Caravelle85

    Caravelle85 Active Member

    Messages:
    134
    Location:
    QLD
    Hi all.
    The sliding door on my 91 keeps on popping open when I go over a bump, fortunately it catches on the latch so doesn't fly open but it is rather annoying. It's done it since I had the bus and I've been through everything on it looking for the problem but no joy. Problem does improve when everything is greased but it still happens. The door does have a dent in it so I'm wondering if that is possibly the problem or at least a contributing factor.
    Couple of questions on parts involving the sliding door....there is what looks like electrical contacts of some sort between the door and the frame (4 pins in the frame matched up to contacts in the door) - are these part of the central locking system? Also, what is the part inside the black cover pictured below?

    Thanks

    IMG_20190119_190320-2268x3024-1701x2268.jpg

    IMG_20190119_190339-2268x3024-1701x2268.jpg
     
  2. David H

    David H Well-Known Member

    Messages:
    4,978
    Location:
    newcastle
    Knowing very little of T3's I'd go with first photo as the electrical contacts & the second photo to be the 'hold it open' rear catch. Both these don't affect the door popping open. Which end is popping open....front or rear?
    Cheers
     
    Syncro27 likes this.
  3. Grantus

    Grantus Well-Known Member

    Messages:
    15,854
    Location:
    Southern ACT
    First pic, you’ve answered yourself :). Yes, it is the contacts for central locking of the slider.

    The black cover is over the rear locking hold open latch..............and just had an alert, that David H is a faster typist! :p
     
    Syncro27 likes this.
  4. Grantus

    Grantus Well-Known Member

    Messages:
    15,854
    Location:
    Southern ACT
    Here’s what it looks like behind the door card: ;)

    59F49F28-9AF6-4698-9393-D5F0EA4D9AE8.jpeg
     
  5. Andy.

    Andy. Active Member

    Messages:
    490
    Location:
    Brisbane
    The first thing to check is are the rollers and alignment correct (is it easy to use the door?)
    I spent a lot of time on mine (had the same issue). I ended up getting a good second hand latch (rear of door that catches the pin) and the problem went away. There was a fair amount of wear inside on the latch mechanism on mine.

    The latch has two "clicks" as it closes. Make sure it's catching on the second clock when it's closed.
     
  6. Syncro27

    Syncro27 Well-Known Member

    Messages:
    6,140
    Location:
    Terrigal, NSW Central Coast
    It will be the rear latch thats stuffed - usually the spring gets weak (its the latch covered by the black flap in Grants photo).

    I had to replace that part on my white caravelle to stop the same problem.

    You need a good second hand rear latch - easy to replace (if you can get the screws out) - the rod is just a circlip. Undo the front circlip as its easily accessible first then you can pull back and get to the rear one.

    Must remove the door card first. :D
     
    robbie0810 likes this.
  7. cbus

    cbus Well-Known Member

    Messages:
    11,837
    Location:
    sunshine coast
    If your spare in other bus doesn't sort it give a yell.
    (See how important spares busses are ) :D
    Can try the one in my parts "3" if years /parts match.
     
  8. Grantus

    Grantus Well-Known Member

    Messages:
    15,854
    Location:
    Southern ACT
    I’ve not had the door pop, but I did have trouble getting it to close at one stage.

    Turned out the adjustable striker bolt mounted on the body was loose. Quick tighten in the correct position, and all was well again.

    Worth checking that yours is tight......:rolleyes:

    A2D3BD04-4884-4623-B84C-E2F32E9B0B3C.jpeg
     
    Last edited: Jan 20, 2019
    robbie0810 likes this.
  9. robbie0810

    robbie0810 Member

    Messages:
    78
    Location:
    Gosford Australia
    A few of us discussed the same problem a couple of years ago, here:
    http://forums.kombiclub.com/threads...r-latch-replacement-repair.54479/#post-592304

    The springs get weak and the latches get worn. I did source a mkii Golf door latch with the same part number, but got my existing one working by dismantling, cleaning and regreasing and the new one is now ready as a backup. I think I also did a bit of filing so the catches mated better.

    Also, as Grant suggested above, it may help to adjust the strike pin so that it is further into the latch mechanism with the door closed.

    Good luck - at least the door doesn't open fully when you go around a bend like mine did!
     
    Syncro27 and Grantus like this.
  10. Dapom

    Dapom Well-Known Member

    Messages:
    685
    Location:
    Brisbane
    There are definite differences between early and late latches though the hold open latch/catch appear to be universal regardless of year :)
     
    David H and Grantus like this.
  11. Caravelle85

    Caravelle85 Active Member

    Messages:
    134
    Location:
    QLD
    Thanks all for the replies and link to the other thread. I'll take a look at that rear latch this week. Col, I'll let you know how I go with fixing up what I have and maybe look at your spare if needed/if it's the right year

    Looks like the part number is 252843603A
     

    Attached Files:

    Last edited: Jan 20, 2019
  12. cbus

    cbus Well-Known Member

    Messages:
    11,837
    Location:
    sunshine coast
    My parts bus is an 88.
    Same pin as photos.
    The " peril" being 83 has a striker plate like a bay as mentioned by Chris.
     
    Dapom likes this.
  13. Barry

    Barry Well-Known Member

    Messages:
    3,731
    Location:
    Abbotsford NSW
    Just thinking ..............

    Seeing as I was good and put my bump stop in .............

    Would not having the bump stop cause this.
    I have had issues previously to putting the bump stop in, where the rear light would come on.
    Didn’t really say the door popped open, seemed shut(ish) to me, but the light was on.

    Was thinking it would cause a gap when you shut it, and yes, if the catch was weak.

    Anyway, as said, just thinking.............
     
  14. Caravelle85

    Caravelle85 Active Member

    Messages:
    134
    Location:
    QLD
    Thanks Barry, good thinking. Will have a look at the bump stop when I'm in there
     
  15. Syncro27

    Syncro27 Well-Known Member

    Messages:
    6,140
    Location:
    Terrigal, NSW Central Coast
    Barry, might just be that the bump stop is pushing the door forward and properly cancelling the door striker switch.???
     
  16. Grantus

    Grantus Well-Known Member

    Messages:
    15,854
    Location:
    Southern ACT
    I could be wrong, but isn’t the bump stop located at the fully opened end of door travel, and therefore have nothing to do with the closing and latching position? o_O
     
  17. Barry

    Barry Well-Known Member

    Messages:
    3,731
    Location:
    Abbotsford NSW
    Unless I put it in the wrong position?
    Should be just touching when closed?
     
    Grantus likes this.
  18. Grantus

    Grantus Well-Known Member

    Messages:
    15,854
    Location:
    Southern ACT
    Never personally replaced one...... so I’d have to credit your info as being more valid than my assumption.
     
  19. Barry

    Barry Well-Known Member

    Messages:
    3,731
    Location:
    Abbotsford NSW
    A5BD4D08-C622-4C88-96F2-F6F8D80F94EC.png Door closed position and “runner thing” ( VW technical term) against bump stop
     
    Grantus likes this.
  20. Barry

    Barry Well-Known Member

    Messages:
    3,731
    Location:
    Abbotsford NSW
    You can just see the horizontal bit that holds the bump stop
     
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