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V8 4.2 Carbon build up

Discussion in 'A5/S5/RS5 Forum' started by the_big_1, Jul 12, 2014.

  1. the_big_1

    the_big_1 New Member

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    Hi guys,

    is the carbon build up on 4.2 V8 still an issue ? I am looking at a 2009 one to buy.
     
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  3. Lloydie22

    Lloydie22 Member

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    I've heard its a problem with all the FSI engines. I have a 2009 audi S5 with 28k miles. But there are reports of these gunking up after the same mileage. I havent had any issues with mine. But then i don't have a clue what the intake valves actually look like as i havent messed about with the engine on this car... YET!
     
  4. Lloydie22

    Lloydie22 Member

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  5. the_big_1

    the_big_1 New Member

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    Surprised if this is a known issue that Audi don't repair it or even offers good will gesture, like labour paid for, owner covers parts etc as this problem is no way down to the owner nor can the owner stop it happening.
     
  6. warren_S5

    warren_S5 Moderator
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    They do in the US, but the UK dealers probably don't give a rats arse as it's a revenue opportunity
     
  7. desertstorm

    desertstorm Moderator
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  8. marshadee

    marshadee Member

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    guys what are the symptoms to a carbon build up issue? My car seems to run fine, like ticking over is smooth, performance seems ok, but I've only had the car 2 months so I wouldn’t really know any difference. Could someone share show light on this please?

    Thanks
     
  9. Statler

    Statler Old enough to know better
    Team Daytona Team V6 Gold Supporter

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    Here's a link to the Dark Side, it should work for you.

    Walnut Blast

    It shows carbon buildup on an e92 and how it was cleaned. This 'walnut shell blasting' seems popular in the BMW circles.
     
  10. marshadee

    marshadee Member

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    thanks mate
     
  11. the_big_1

    the_big_1 New Member

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    I would be interested too in the side effects of carbon build up. Only had the car a week and only thing I have noticed is tick over seems not 100% smooth and looks to be at about 650 - 700 rpm
    Car has usual three month warranty as all traders have to give. Would Carbon build up come under the warranty or is it deemed normal wear and tear??
     
  12. Ian_H

    Ian_H New Member

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