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  1. #1
    Veteran Member Four Rings n7plus1's Avatar
    Join Date
    Dec 19 2007
    AZ Member #
    23482
    My Garage
    2003 A4 1.8TQM, 2002 Beetle GLS 2.0M
    Location
    York, PA
    Items for Sale

    How to clean inside of coolant expansion tank?

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    i looked all over and cant find shit. is there any ideas or ways people have cleaned theres out on the inside to make it look new again? i want to refresh my old grey tank.

  2. #2
    Veteran Member Four Rings Kittrell's Avatar
    Join Date
    May 07 2008
    AZ Member #
    28523
    My Garage
    '05 Ultra Sport
    Location
    Portland, OR
    Items for Sale

    Someone mentioned it on a thread here. Let me see if I can hunt it down.

    *Edit, bam! I'll not give you shit for having posted in that thread........

    http://www.audizine.com/forum/showth...ight=gray+tank

  3. #3
    Active Member Two Rings poneman's Avatar
    Join Date
    Feb 16 2009
    AZ Member #
    38786
    My Garage
    2003 Audi A4, 94 Jeep, 06 WRX, LT500R Quadzilla, + quads, mtn. bikes, 9000lb lift!
    Location
    Saratoga, NY

    I used an acid solution I use at work for cleaning beverage piping, it's a mix of phosphoric & nitric acid diluted 50% with water. Got 90% out though not all of the brown stuff came out of the baffles. I didn't want to soak it for too long as I thought it may eat away at the level sensor probe. BTW=A cheap way to get phosphoric acid is Behr concrete etcher at Home Depot, it's strong and works good at getting rust,scale off things if you don't happen to have drums of acid at your disposal. Worst case, $20 for a new one: Click
    [ APR 1+ - Stasis SS - 18" VMR - Forge Splitter - IE Rods - JE - Supertech Valves - Frankenturbo ]

  4. #4
    Veteran Member Four Rings Valve_Cover's Avatar
    Join Date
    Aug 06 2009
    AZ Member #
    46040
    My Garage
    MK2 1.8T GTI
    Location
    Qc

    buy a bottle of coolant flush (8$) at any parts store. Dilute it into water 50/50. Remove your coolant tank, block the holes, fill with the solution, and let it sit for a half hour shaking it every few minutes. Got mine looking like brand new.

    1.8TQM | UNITRONIC 2 | TT225 | APR | FORGE | EUROCODE | DDM | ATP | DYNAVIN | BREMBO |

  5. #5
    Veteran Member Four Rings MikTip's Avatar
    Join Date
    Dec 25 2004
    AZ Member #
    4604
    Location
    Earth

    Why not simply buy a new one!


  6. #6
    Veteran Member Four Rings Kittrell's Avatar
    Join Date
    May 07 2008
    AZ Member #
    28523
    My Garage
    '05 Ultra Sport
    Location
    Portland, OR
    Items for Sale

    I think he likes his gray one.......

  7. #7
    Veteran Member Four Rings Valve_Cover's Avatar
    Join Date
    Aug 06 2009
    AZ Member #
    46040
    My Garage
    MK2 1.8T GTI
    Location
    Qc

    Quote Originally Posted by Kittrell View Post
    I think he likes his gray one.......
    Actually I bought a brand new clear one with the new style cap, and after 6 months it was all yellowish for some reason, so i cleaned out the grey one and put it back in lol..
    1.8TQM | UNITRONIC 2 | TT225 | APR | FORGE | EUROCODE | DDM | ATP | DYNAVIN | BREMBO |

  8. #8
    Veteran Member Four Rings n7plus1's Avatar
    Join Date
    Dec 19 2007
    AZ Member #
    23482
    My Garage
    2003 A4 1.8TQM, 2002 Beetle GLS 2.0M
    Location
    York, PA
    Items for Sale

    Quote Originally Posted by Kittrell View Post
    Someone mentioned it on a thread here. Let me see if I can hunt it down.

    *Edit, bam! I'll not give you shit for having posted in that thread........

    http://www.audizine.com/forum/showth...ight=gray+tank
    yeah i remember seeing the topic once before but i couldnt find it. thanks man.

  9. #9
    Veteran Member Four Rings n7plus1's Avatar
    Join Date
    Dec 19 2007
    AZ Member #
    23482
    My Garage
    2003 A4 1.8TQM, 2002 Beetle GLS 2.0M
    Location
    York, PA
    Items for Sale

    Quote Originally Posted by Kittrell View Post
    I think he likes his gray one.......
    i have a white one now, i want to use my grey one again. ;)

  10. #10
    Veteran Member Four Rings ocod's Avatar
    Join Date
    Feb 17 2009
    AZ Member #
    38814
    My Garage
    05 A4 1.8TQM, 05 Nissan Xterra, 99 Sea Doo Sportster
    Location
    miami

    Quote Originally Posted by n7plus1 View Post
    i have a white one now, i want to use my grey one again. ;)
    you sir are in luck. While strolling classifide section I saw Kirk's ad for cheap stuff and remembered your post/request.
    you can PP a finders fee

    http://www.audizine.com/classifieds/...4-stuff&cat=21
    KO4 APR Stage II+ // tt injectors // Podi SW gague // NGK BRK 7E .28 gap // 2.5" Test Pipe // Forge 007 DV //
    APIKOL Snub Mount // Stock N75 // 20%Tint // DTH FRP Skirts // 270 miles to empty // B7 key fob // 35W 5K HID's

  11. #11
    Veteran Member Four Rings n7plus1's Avatar
    Join Date
    Dec 19 2007
    AZ Member #
    23482
    My Garage
    2003 A4 1.8TQM, 2002 Beetle GLS 2.0M
    Location
    York, PA
    Items for Sale

    i have my grey tank still. just sitting in storage



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