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Overboost :(

Discussion in 'Leon Mk2' started by Neilzomg, Jul 8, 2018.

  1. R3k1355

    R3k1355 Senior Member

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    Have you plugged it into VCDS and read codes and live data?? or just put a cheap eBay generic code reader on and hoped for the best??
     
  2. Mobbs69

    Mobbs69 Member

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    Cheap eBay one
     
  3. Mobbs69

    Mobbs69 Member

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    Ok thanks guys garage it is
     
  4. Neilzomg

    Neilzomg Member

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    Got the car sorted so far no Errors I'm guessing bad waste gate and or bad vanes looks gunked up but the fins seem. Fine no play etc on shafts.

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    #24 Neilzomg, Jul 18, 2018
    Last edited by a moderator: Jul 19, 2018
  5. Mobbs69

    Mobbs69 Member

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    I've found the problem with mine its a new engine the rings have gone on mine
     
  6. Neilzomg

    Neilzomg Member

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    Piston rings? Surely you wouldn't need a whole new engine for a new set of piston rings. Might be an expensive repair but at least if you fix that engine's rings you know that's whats needed to fix that engine. Otherwise buying another pulled engine from another car you don't know what wear it has if you know what i mean. I've done a hell of a lot of work to this car since i got it which is less than a year, New tandem pump and gaskets, New timing belt and chain last month, New turbo oil feed and drain pipes, New calipers and pads and brake service, New springs and drop links, New tyres at almost £80 a tyre, I've had exhaust issues which i've had to fix and the next big one is fitting a whole new inside fuse box as the fan has melted the block, or either putting in a new blade connecter and bypassing the bad block. Love this car theres just something about it that when something breaks i need to keep her alive, haven't test driven another car that feels the same way as this mk2 2.0tdi sport reference feels like lol.

    Better the devil you know than the devil ya dont i guess
     
  7. Neilzomg

    Neilzomg Member

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    I did a bit of reading on overboost online and what i thinks happened to your car is that the overboost has pushed the engine too far

    "
    This release of energy over an extended amount of time will damage engine components, shatter valves, blow holes in pistons, shatter rings, etc...

    Engines normally have some margin for error, meaning that they tuned to produce less boost than the maximum amount that they can tolerate. Overboost pushes the boost to the maximum amount or beyond."

    So i think the overboost has damaged the piston rings in your case, so when you replaced the turbo the damaged to the engine had already been done. Not that you didn't need a new turbo it was just too late into replacement
     
    maciek.snow likes this.
  8. maciek.snow

    maciek.snow Full Member

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    Piston rings can be changed from down below. You dont have to take the head out ;)

    But just one thing.Your pics do not display (cant see anything) How did you find that its the rings, what did you check ? Constant Overboost usualy blows the head gasket first. Correct me if im wrong, but ive never heard of busted piston rings because of overboost?

    Wysłane z mojego SM-G930F przy użyciu Tapatalka
     
    #28 maciek.snow, Jul 19, 2018
    Last edited: Jul 19, 2018
    Neilzomg likes this.
  9. Mobbs69

    Mobbs69 Member

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    Its a rebuilt engine its like brand new his just putting my turbo and bits off my engine to the brand new rebuilt engine then giving me 2 years warranty
     
  10. Mobbs69

    Mobbs69 Member

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    I'm using about a ltr of oil a week and no leaks and when its running removed oil filler cap and you can hear the air shouldn't hear anything same as the dip stick and. It was quoted 1700 for new pistons rings and com rods and that's not fitted
     
    maciek.snow likes this.
  11. maciek.snow

    maciek.snow Full Member

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    Fair enouhg ;) just one more thing to confirm. Does it smoke a bit blue when starting it in the morning? This could mean the valve seals are bad.

    Wysłane z mojego SM-G930F przy użyciu Tapatalka
     
  12. Mobbs69

    Mobbs69 Member

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    And I really appreciate the input from you guys I love my cupra its never let me down till now that's why I've decided to keep it and spend the money on it
     
    maciek.snow likes this.
  13. Mobbs69

    Mobbs69 Member

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    It smokes every time you
     
  14. Mobbs69

    Mobbs69 Member

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    And has anyone had dealings with ecu solutions in essex there the ones that will put the engine in
     

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