Results 1 to 10 of 10

Thread: Air cooled thermostat repair

  1. #1

    Air cooled thermostat repair

    So as itís impossible to get new thermostats like the originals, I thought I would have a go at repairing a couple and see how I get on:







    Tested the thermostats in water to see that both were leaking from the top seam, so gently heated the top until it simply slid off.




    A bit of cleaning up of the mating surfaces to wipe off the excess solder and they are ready for fitting back on once I have cleaned out the hole where I will add the Isopropyl Alcohol prior to bunging up and hopefully back in working condition.




    More photos to follow tomorrow once I have cleaned out the hole and got it ready for assembly.


    Sent from my iPhone using Tapatalk

  2. #2
    ***Euro-Nova Supporter*** BlueNova's Avatar
    Join Date
    Apr 2015
    Location
    St Andrews, Scotland
    Posts
    1,957
    Iím impressed! My engine didnít have the thermostat or flaps in the fan shroud but I found some online. Unfortunately when they arrived the thermostat failed when I put it in water. I found an alternative design online and went with that ... but now youíve got me thinking I could still repair the old leaking thermostat (that Iíve still got) myself ... thanks!

    Have to say that Iím well impressed with the scale of your engine rebuild ... once itís back together youíll know itíll last for years!

  3. #3
    So very nearly done.
    I struggled to unblock the hole in the threaded boss so had to drill it through, then proceeded to solder the top back on. All seemed to be sealed ok as when squeezed and placed against my palm, it sucked on to it.
    I proceeded to put 2ml isopropyl alcohol through the hole, compress it and then hung the hole with solder. Placed it back into a pan and heated. Unfortunately as it heated it started leak through a tiny hole that unfortunately I couldnít block:





    I have now had to take them apart again which unfortunately didnít come apart as cleanly as before.
    Have ran out of solder too, so will get some more and have another go next week


    Sent from my iPhone using Tapatalk

  4. #4
    Senior Member
    Join Date
    Aug 2013
    Location
    Near Eastbourne
    Posts
    753
    Just out of curiosity, what kind of solder are you using? Silver solder?

  5. #5
    Quote Originally Posted by Gaisa View Post
    Just out of curiosity, what kind of solder are you using? Silver solder?
    To be honest, I donít know. It was in a kit with a butane torch that I had in my garage, the solder is not labelled.


    Sent from my iPhone using Tapatalk

  6. #6
    Senior Member
    Join Date
    Jan 2020
    Location
    Upper Hartfield, E Sussex
    Posts
    235
    If you can't fix it, it's possible to convert a T1 bellows, it does open slightly earlier but not by a significant amount
    Mike

  7. #7
    ***Euro-Nova Supporter*** BlueNova's Avatar
    Join Date
    Apr 2015
    Location
    St Andrews, Scotland
    Posts
    1,957
    Quote Originally Posted by Mikemrb View Post
    If you can't fix it, it's possible to convert a T1 bellows, it does open slightly earlier but not by a significant amount
    Mike
    Mike's right, I got one from Limebug (other suppliers are of course available!) but here's the link ....

    https://www.limebug.com/product/view...tat-65-70-c-55

    .... and here's a photo of mine fitted. You need to make a slight modification to the mounting bracket to make it fit, but it's straightforward.

    Alistair


  8. #8
    Senior Member Brett's Avatar
    Join Date
    Nov 2018
    Location
    Las Vegas,NV USA
    Posts
    459
    Quote Originally Posted by Supanovakit View Post
    So very nearly done.
    I struggled to unblock the hole in the threaded boss so had to drill it through, then proceeded to solder the top back on. All seemed to be sealed ok as when squeezed and placed against my palm, it sucked on to it.
    I proceeded to put 2ml isopropyl alcohol through the hole, compress it and then hung the hole with solder. Placed it back into a pan and heated. Unfortunately as it heated it started leak through a tiny hole that unfortunately I couldnít block:





    I have now had to take them apart again which unfortunately didnít come apart as cleanly as before.
    Have ran out of solder too, so will get some more and have another go next week


    Sent from my iPhone using Tapatalk

    Not cheap but they are brand new with a 2 year warranty and if they should ever fail the flaps stay open



    https://vwparts.aircooled.net/Thermo...1-119-159a.htm

    http://www.awesomepowdercoat.com/the...d_rebuilt.html

  9. #9
    Cheers for the links guys. Me being me, saw it as a bit of a challenge to do the refurb on it, especially as having virtually zero soldering experience. Will give it a couple more goís and see what happens.


    Sent from my iPhone using Tapatalk

  10. #10
    ***Euro-Nova Supporter*** Peter's Avatar
    Join Date
    Jul 2007
    Location
    Estepona, Spain
    Posts
    4,052
    Never had flaps on any of my VW engines, not sure why not, just never there. Of course I don't need them here anyway but I did need to add director viens in the center mounted shroud to aid cooling on #3.
    Last edited by Peter; 11-04-2021 at 01:09 PM.
    The opinions expressed in my posts may not be made in a sound mind and should be taken in the spirit intended, Jack Daniels is fine.
    Some people see things as they are and ask why? I dream things that never were and ask, why not?Ē JFK
    Genuine and an original, "Grumpy old mechanic".

    http://ukhozi.page.tl

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •