R8 V8 Coolant Expansion Tank Leak - Page 2


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Thread: R8 V8 Coolant Expansion Tank Leak

  1. #11
    Senior Member Ricky.REP's Avatar
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    Re: R8 V8 Coolant Expansion Tank Leak

    The number has been superseded over the years Trev so I would make the assumption this is the case.

    Cheers Ricky


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  3. #12
    Senior Member Trev450's Avatar
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    Re: R8 V8 Coolant Expansion Tank Leak

    Thanks Ricky. Hopefully that will be the first and last time I need to replace it then.
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  4. #13
    Senior Member Ricky.REP's Avatar
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    Re: R8 V8 Coolant Expansion Tank Leak

    Quote Originally Posted by Trev450 View Post
    Thanks Ricky. Hopefully that will be the first and last time I need to replace it then.
    Hopefully....I've not had a repeat failure. But age may play a big part of it.

    Cheers Ricky

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  6. #14
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    Re: R8 V8 Coolant Expansion Tank Leak

    Hello Ricky, i may have the same issue.
    What is the updated part Number?
    I have 420121403. It seems the same of Q7.
    Can you quote it ? thanks

  7. #15
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    Re: R8 V8 Coolant Expansion Tank Leak

    Just checked.
    Expansion test is leaking under pressure from the middle, i need to change it.
    Audi Recall is not useful, they just put a latch on the tank to reduce the plastic expansion under pressure but if the plastic cracks due to heat and aging the latch can do few or nothing.

  8. #16
    Senior Member Trev450's Avatar
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    Re: R8 V8 Coolant Expansion Tank Leak

    I had a similar issue with mine last year. The original split before the recall and when it went in later in the year for the recall itself, they replaced the tank with a 'later' version together with the band that goes around it.
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  9. #17
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    Re: R8 V8 Coolant Expansion Tank Leak

    Check the bill of the recall. I checked mine and they have not changed the tank. However the code of my tank was the above one so maybe in the past they had a different number. The recall is totally unuseful

  10. #18
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    Re: R8 V8 Coolant Expansion Tank Leak

    My car just went in for a service and I let them know I'd been seeing the dreaded fogging in the top of the engine bay behind the driver side (I'm RHD). Sure enough, tank is leaking! They'd done the bracket already last year, so need a new tank. They quoted about $600USD for the part alone (yeow!) so I've just ordered the gen2 one for 75 Euro shipped. Will report back on how it all mounts when it gets here!

  11. #19
    Senior Member Ricky.REP's Avatar
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    Re: R8 V8 Coolant Expansion Tank Leak

    There is not an updated part number as it's not superceded it's just replaced.

    As in the tank manufacturer do not make the old tank anymore just the new one.

    $600 dollar for the tank is laughable.

    I supplied a new tank and bracket to a member in USA for much much less including shipping.

    Cheers Ricky


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  12. #20
    Junior Member itsav8mate's Avatar
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    Re: R8 V8 Coolant Expansion Tank Leak

    Hi folks - FYI my '07 V8 did have the re enforcement work done in mid 2017 - and over the weekend, the tank failed and caused a pretty extensive leak - imagine because the flawed part was just able to deal with that bit more pressure before letting go. The main dealer garage who did the re-enforcement work in 2017 are currently investigating - but confirmed that the tank had failed. I will post Audi's reaction (either Audi UK, or what the specific garage decides to do).

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