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  1. #1
    Established Member Two Rings
    Join Date
    Jan 12 2015
    AZ Member #
    309080
    Location
    New York

    Confusion on bleeding the coolant system

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    So I changed my alternator last night and drained the system to get the hose out of the way. Put everything back and now I'm trying to bleed the system and it's not bleeding. I've seen numerous threads saying the heater core bleeder hole(which I do not have) so I pulled the hose back just enough for the hole to be on the edge to let out what ever is needed. Left the car running with the heat on full blast on the highest temperature and nothing. Had it that way for about 20 minutes, maybe a little more. Steam started to come out but no coolant and heat would get a little warm when I would Rev it and get cold again at idle. Did I just not wait enough or am I doing something wrong? Any help would be greatly appreciated.
    So far I've tried
    Squeezing the hose.
    Lifting the reservoir higher than the rest of the system
    Cap off.
    Cap on
    Heater core hole exposed
    Hoke blocked off.

  2. #2
    Veteran Member Four Rings zillarob's Avatar
    Join Date
    Nov 16 2010
    AZ Member #
    67118
    My Garage
    2kS4, 84gli, 84caddy dsl
    Location
    WetSide, WA

    Look down just dside of the tbody, kinda below the dv, there is another port to bleed. 5 or 6mm allen.
    Doesnt need to be running, just open it up a couple turns and wait for coolant.
    There are only 2 things needed to make an Audi work properly - Duct tape and WD40. If it moves and it shouldn't - Duct tape. If it doesn’t move and it should - WD40.

  3. #3
    Established Member Two Rings
    Join Date
    Jan 12 2015
    AZ Member #
    309080
    Location
    New York

    Thanks man I'll try that. So do that one then the heater core bleeder or the Allen will be enough?

  4. #4
    Veteran Member Three Rings
    Join Date
    Dec 04 2008
    AZ Member #
    35985
    My Garage
    5 audis and an f250
    Location
    Cresco PA

    Quote Originally Posted by zillarob View Post
    Look down just dside of the tbody, kinda below the dv, there is another port to bleed. 5 or 6mm allen.
    Doesnt need to be running, just open it up a couple turns and wait for coolant.
    learn something new every day. been dealing with these cars for 8 years never knew thats what that was for.
    Mine - Silver 01.5 S4 stage 2 - st - apr - ssac - apikol
    Wife - Imola 00 S4 stage 2 - st - ssac - podi - usp - 034
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  5. #5
    Established Member Two Rings
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    Jan 12 2015
    AZ Member #
    309080
    Location
    New York

    Yeah so many little things here and there to find out about the car

  6. #6
    Veteran Member Three Rings goalieman24's Avatar
    Join Date
    Mar 29 2011
    AZ Member #
    73117
    Location
    Maryland

    Quote Originally Posted by SlowDr1v3r View Post
    Thanks man I'll try that. So do that one then the heater core bleeder or the Allen will be enough?
    It's usually a low to high sequence. So you'd want to bleed at that allen first, then the heater core hose.

    I think there's a third spot in between the two according to the factory manual bleed sequence.

  7. #7
    Established Member Two Rings
    Join Date
    Jan 12 2015
    AZ Member #
    309080
    Location
    New York

    Any idea where it is? I've read threads about the heater core and Allen but never a 3rd. But thanks definitely gotta try that.

  8. #8
    Veteran Member Four Rings Zba's Avatar
    Join Date
    Nov 05 2009
    AZ Member #
    50303
    Location
    Denver

    Quote Originally Posted by goalieman24 View Post
    I think there's a third spot in between the two according to the factory manual bleed sequence.
    According to Alldata it is on the coolant crossover pipe next to the after run switch behind the bank 2 head.

    With that said I don't recall ever actually seeing one back there

  9. #9
    Established Member Two Rings
    Join Date
    Jan 12 2015
    AZ Member #
    309080
    Location
    New York

    Thanks I'll look for it but I don't remember seeing one either. If I don't see it I'll try the Allen then the heater core and post how it goes.

  10. #10
    Veteran Member Four Rings getslideways's Avatar
    Join Date
    May 16 2008
    AZ Member #
    28851
    Location
    WA

    Quote Originally Posted by Zba View Post
    According to Alldata it is on the coolant crossover pipe next to the after run switch behind the bank 2 head.

    With that said I don't recall ever actually seeing one back there
    me neither, unless they are talking about the tiny reservoir line that goes to the "T" i guess air could get trapped there:



    pay no attention to the ms paint lines



    Keep us posted on what works or doesnt work for ya OP

  11. #11
    Veteran Member Four Rings zillarob's Avatar
    Join Date
    Nov 16 2010
    AZ Member #
    67118
    My Garage
    2kS4, 84gli, 84caddy dsl
    Location
    WetSide, WA

    Thats the one in the pic above, the top of the upper pink line points right at it.

    I usually only do the one up front and recommend you stay as far away from the heater core as possible.
    Seriously, stay the fk away from the heater core unless that evil mofo gives you a reason to monkey with it.
    There are only 2 things needed to make an Audi work properly - Duct tape and WD40. If it moves and it shouldn't - Duct tape. If it doesn’t move and it should - WD40.

  12. #12
    Veteran Member Four Rings getslideways's Avatar
    Join Date
    May 16 2008
    AZ Member #
    28851
    Location
    WA

    Quote Originally Posted by zillarob View Post
    I usually only do the one up front and recommend you stay as far away from the heater core as possible.
    Seriously, stay the fk away from the heater core unless that evil mofo gives you a reason to monkey with it.
    +1000

    Age + Plastic = insta-crumble

  13. #13
    Veteran Member Four Rings vavJETTAw36's Avatar
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    Jul 04 2012
    AZ Member #
    96276
    Location
    Woodbridge, VA

    Quote Originally Posted by zillarob View Post
    Thats the one in the pic above, the top of the upper pink line points right at it.

    I usually only do the one up front and recommend you stay as far away from the heater core as possible.
    Seriously, stay the fk away from the heater core unless that evil mofo gives you a reason to monkey with it.
    Lol. That's some funny stuff. So true though.


    Sent from my iPhone using Tapatalk

  14. #14
    Established Member Two Rings
    Join Date
    Jan 12 2015
    AZ Member #
    309080
    Location
    New York

    Lol yeah I was worried but thankfully didn't give me issue. Did the front still had no heat. So closed the cap and rev'd it up and the coolant started coming out and it's all good now. Thanks a lot for all the help everyone

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