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

Coolant leaking from the coolant tank A4 B6 1.9 TDI

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by delc83, Dec 19, 2013.

  1. delc83

    delc83 New Member

    Joined:
    Jun 9, 2011
    Messages:
    19
    Likes Received:
    0
    Hi Guys
    Audi A4 B6 1.9 TDI 130, AVF, 2004
    I've noticed coolant is leaking from the hole under the coolant tank, when ive been driving, it isnt loosing much at the moment, but when I open the bottle pressure comes out and the coolant rises.
    Ive have replaced the coolant tank with a new one, still leaking.
    I've also replaced the thermostat (genuine), temp sensor, because it wasnt sitting at 90, but is now.
    Earlier this week water pump failed, so got that replaced, even though it was replaced at 115k, 7 months ago.
    It is still leaking and the coolant has gone a bit dirty, ive had the sniff test done, and it didnt show any hydro carbons, and the colour didnt change and also pressure test on the coolant bottle and pressure was fine.
    Hope its not the head gasket, my friend said it could be the oil cooler.
    Any help or guidance would be appreciated.
     
  2. Advert Guest Advertisement


  3. B5NUT

    B5NUT Well-Known Member
    VCDS Map User

    Joined:
    Feb 6, 2010
    Messages:
    3,392
    Likes Received:
    571
    I had the same problem and it was the HG, its one of the only ways to pressure rise the coolant system and water to be forced out of the coolant bottle, only other cause than I can think of is a cracked head.
     
  4. delc83

    delc83 New Member

    Joined:
    Jun 9, 2011
    Messages:
    19
    Likes Received:
    0
    How much did it cost?
     
  5. B5NUT

    B5NUT Well-Known Member
    VCDS Map User

    Joined:
    Feb 6, 2010
    Messages:
    3,392
    Likes Received:
    571
  6. Mollygoogle

    Mollygoogle Member

    Joined:
    Aug 21, 2012
    Messages:
    187
    Likes Received:
    2
    Just had the same symptoms with mine and it was the head gasket. Hopefully yours works out better than mine has so far
     
  7. pauldazzle

    pauldazzle Well-Known Member

    Joined:
    Nov 11, 2009
    Messages:
    1,074
    Likes Received:
    74
    Head gasket failing.
     
  8. delc83

    delc83 New Member

    Joined:
    Jun 9, 2011
    Messages:
    19
    Likes Received:
    0
    I just dont want to get it opened and have a cracked head.
    Is £300-£400 a good price to get the HG replaced? a mechanic said sometimes injectors fail when replacing the HG, ive also been told skimming the head isnt a good idea on a PD engine, is this true?
     
  9. AudiLeon

    AudiLeon Well-Known Member
    VCDS Map User

    Joined:
    Nov 24, 2009
    Messages:
    2,121
    Likes Received:
    131
    Did you replace the cap?
     
    BakPak likes this.
  10. delc83

    delc83 New Member

    Joined:
    Jun 9, 2011
    Messages:
    19
    Likes Received:
    0
    Yes i replaced it with my mates, ive noticed the pipe thats connects to the radiator goes really hard when ive been driving around. its building pressure, only way to let it out is to open the cap, and some air and more coolant comes out the hole from under the tank, and the pipe goes soft again.
     
  11. BakPak

    BakPak No Gear

    Joined:
    Dec 30, 2012
    Messages:
    952
    Likes Received:
    135
    Had very similar problem with mine, 1.9tdi 130 5 speed. After giving the coolant system a dose of K-Seal no problems since. Done approx 500 miles. Mark.
     

Share This Page