1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Home made boost leak tester.

Discussion in 'A3/S3 Forum (8L Chassis)' started by Westy, Dec 6, 2011.

  1. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
    Ok, I've got to the stage where I'm fed up of boost leaks appearing every other week and am thinking about making a boost leak tester for home.

    Now as far as getting compressed air into the boost system can I use something as simple as an electronic tyre inflater as I wont need much more than 30psi. Or will it be better to invest in a small air compressor?
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. ScottD3

    ScottD3 I want your faulty electronics
    Supporter

    Joined:
    Nov 24, 2010
    Messages:
    15,274
    Likes Received:
    1,083
    the compressor will fill the system quicker than the tyre inflater but a good tyre inflater will do just as good a job getting the air in for you to find leaks.

    Since you do LNM, It might be worth investing in a tidy 2hp 50litre or so compressor for some basic air tools.
     
    #2 ScottD3, Dec 6, 2011
    Last edited: Dec 6, 2011
  4. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
    JimS3 likes this.
  5. SiGainey

    SiGainey Member

    Joined:
    Sep 29, 2003
    Messages:
    488
    Likes Received:
    4
    I have a boost leak tester that you can have for cheap m8 :) PM me :)
     
  6. SiGainey

    SiGainey Member

    Joined:
    Sep 29, 2003
    Messages:
    488
    Likes Received:
    4
    clear ya inbox m8 :)
     
  7. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
    Done matey
     
  8. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
  9. aragorn

    aragorn "Stick a V8 in it!"
    Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    16,667
    Likes Received:
    474
    A tyre inflator wont cut it. The engine leaks down anyway thru the valves and piston rings, so you need to get the air in there quickly, which means you need a compressor with a storage tank. Its also much better to be able to charge the tank, shut the compressor power off, and do the leak test using the stored air so you can hear any hissing of escaping boost without the compressor rattling away in your ear.

    Either one you've linked is probably ok. The second one claims to be more powerful (2hp rather than 1.5) but its also some unheard of brand, whereas i have heard of einhell before.
     
  10. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
    I'll be running the air through the FMIC boost hoses from charge pipe to inlet mani so wont be loosing any through the seals.

    I think i'll go for the 2hp one and can hopefully rig up a few air tools too.
     
  11. aragorn

    aragorn "Stick a V8 in it!"
    Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    16,667
    Likes Received:
    474
    Surely it makes sense to test everything including the manifold gaskets and injector seals?

    Simply remove the maf and fit the tester in its place, blank the PCV line and pressurise the lot.
     
  12. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
    Can do I suppose. I'm scared that will uncover even more leaks then just the boost hoses :(
     
  13. aragorn

    aragorn "Stick a V8 in it!"
    Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    16,667
    Likes Received:
    474
    Well the point is to test the whole system as it is on the car.

    By removing the pipes, testing them as a closed circuit, then reconnecting, you dont actually know for instance if your clamps are tight enough once reattached, and the moving around of everything could disturb components.

    By testing the complete circuit attached to the engine as it will be when your actually driving, your covering everything, including any potentially hidden split hoses under the manifold or even a leaking gasket or whatever.
     
  14. Jason.s

    Jason.s Active Member

    Joined:
    May 12, 2010
    Messages:
    2,879
    Likes Received:
    348
    All this effort and talk of buying compressors..can you not just take it to get smoke tested? lol
     
  15. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
    I am Jason, Booked in to see Bill in January.

    I'm thinking about for the future and also with the ability to use some air tools too.
     
  16. Jason.s

    Jason.s Active Member

    Joined:
    May 12, 2010
    Messages:
    2,879
    Likes Received:
    348
    Fair enough. The prospect of airtools at home is pretty awesome. Even when i borrowed a mates electric impact wrench it was pretty sweet. Made things so much quicker and easier when i did my clutch on the Civic.
     
  17. Alex C

    Alex C Well-Known Member
    VCDS Map User Audi S3

    Joined:
    Jan 26, 2010
    Messages:
    2,970
    Likes Received:
    242
    i fired the pistons out of my brakes this weekend with an air compressor - interesting :)
     
  18. Westy

    Westy Double Dark Side! Diesel & 8P

    Joined:
    Dec 2, 2008
    Messages:
    17,362
    Likes Received:
    1,009
    I had to fire mine out with a foot pump, so this compressor will make things a lot easier.
     
  19. Alex C

    Alex C Well-Known Member
    VCDS Map User Audi S3

    Joined:
    Jan 26, 2010
    Messages:
    2,970
    Likes Received:
    242
    yeah, i had fun trying to blow the last piston out with 3 blank cylinders. Now I, like you were, are flumaxed by the dam dustboots
     

Share This Page