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

Possible Head Gasket Issue?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by mathu, Dec 14, 2011.

  1. mathu
    Offline

    mathu Member

    Joined:
    May 4, 2011
    Messages:
    117
    Likes Received:
    1
    [Dec 14, 2011]
    Hi guy i have found this white mayonnaise substance on the underside of the oil cap and i am now worried, i recently have new breather pipes fitted and also noticed that my dipstick is perfectly clean (only oil in it). could anyone tell me how to diagnose if its a head gasket problem please?

    [​IMG] [​IMG]
    #1
  2. Ads

    Ads

    [Oct 2, 2014]

  3. cloughy
    Offline

    cloughy Member

    Joined:
    Sep 25, 2011
    Messages:
    515
    Likes Received:
    15
    [Dec 14, 2011]
    Do you do a lot of small journeys? when did you last change the oil fella? white stuff is water/condensation can be gasket or can be alot of small journeys where condensation hasn't had a chance to burn off
    #2
  4. crunchie
    Offline

    crunchie Active Member

    Joined:
    Oct 2, 2009
    Messages:
    869
    Likes Received:
    64
    [Dec 14, 2011]
    If its still like that after a good long run or if you get "Mayo" on the dipstick oil then I'd be worried.
    My 2.0T looked exactly the same last winter. Turns out there was nothing wrong tho.
    The baffle plate just below the filler whips it about more than normal too making it look worse.
    #3
  5. mathu
    Offline

    mathu Member

    Joined:
    May 4, 2011
    Messages:
    117
    Likes Received:
    1
    [Dec 14, 2011]
    i do some small journeys but they are usually 15mins at the shortest, the oil change was quite recent as a just had a full service about two months ago so doubt it is bad oil quality. i just cleaned it off and ill take a look tomorrow after a drive, is 20mins a long enough drive?
    #4
  6. BlueSpark
    Offline

    BlueSpark 6th Gear

    Joined:
    Aug 28, 2010
    Messages:
    386
    Likes Received:
    6
    [Dec 14, 2011]
    Turn the heaters on inside with setting to hot. If it still blows cold air even when engine is at temperature then head gasket has gone. Also check the the oil temp gauge doesnt go above 90c or half way point. if its overheating then i'm afraid you have most of all signs of head gasket failure: mayo under oil cap, engine overheating, cold air from heaters when set to hot!
    #5
  7. mathu
    Offline

    mathu Member

    Joined:
    May 4, 2011
    Messages:
    117
    Likes Received:
    1
    [Dec 14, 2011]
    from what your saying i think I'm fine :) my heating is fine even when it not fully turned hot it still blows hot air, recently my temp way sitting just below 90c so i had the temp sensor and the termo stat change and the problem was fixed. so I'm hoping it is just condensation now.
    #6
  8. mathu
    Offline

    mathu Member

    Joined:
    May 4, 2011
    Messages:
    117
    Likes Received:
    1
    [Dec 15, 2011]
    just a quick question, i recently just had a new thermo stat and temp sensor installed, is the a thermo stat gasket in these cars and would this have anything to do with the problem?
    #7

Share This Page