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Thread: FML - KO4 Turbo

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    ShaunS3's Avatar
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    FML - KO4 Turbo

    Ok, let's cut to the chase....upon removal of my downpipe (part of a mechanical overhaul/modding process), i found this....







    Just what I didn't want to see, but i'm glad i found out now rather than it failing altogether and causing catastrophic engine/turbo failure.

    A quick search revealed just a couple of threads that possibly suggest this isn't uncommon, especially for high mileage cars like mine having covered just short of 130K.

    Any thoughts on possible causes for the cracks? I currently believe this is a combination of age, mileage and enthusiastic driving styles through the various owners. Is this a classic case of the engine/turbo not being warmed up and cooled down properly before or after being subject to hard driving?

    On the plus side, my 3'' Relentless DP and 3'' Relentless de-cat pipe are now up for sale in classifieds - Monies will be going to a good cause....to replace my broken turbo

    Classifieds: Relentless 3'' Downpipe & Relentless 3'' De-cat 1.8T

    Cheers, Shaun.
    Last edited by ShaunS3; 27th March 2013 at 22:13.

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    Just normal wear and tear i would say at 130k

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    FML - KO4 Turbo

    Mine was like that along with a few other cracks. My turbo was on around 115k but had been wrecked by a cheap remap. Performance was reduced due to the cracks.
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    Quote Originally Posted by Westy View Post
    Mine was like that along with a few other cracks. My turbo was on around 115k but had been wrecked by a cheap remap. Performance was reduced due to the cracks.
    Fair play. Do you mind me asking what map it was or by whom it was from?

    I'm going over to AET Turbo's tomorrow for them to have a look, but most likely i will go for an exchange unit due to VOR time.

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    Excessive egts probably due to remaps and no added fuelling. That face that's cracked pretty much takes the brunt of the exhaust gasses entering the turbo. The only stress that part sees is pressure and temp. There's a chance it's been there for the last 100k with no issues so you could argue its fine but its not worth the risk.

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    Quote Originally Posted by beachbuggy View Post
    Excessive egts probably due to remaps and no added fuelling. That face that's cracked pretty much takes the brunt of the exhaust gasses entering the turbo. The only stress that part sees is pressure and temp. There's a chance it's been there for the last 100k with no issues so you could argue its fine but its not worth the risk.
    It's already suffering major boost leaks through the PCV system but i think this has also something to do with it. It had developed a slight whining noise over the past week or two, only very faint though....nothing blatantly obvious. Would this tie in with the cracks now apparent?

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    Are there any tell tale signs of a cracked turbo? I.E. Unusual noises, loss in performance/boost pressure etc?

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    I wouldn't over think it, I would be more surprised to take a K04 off and it not be cracked.

    Swap it out and crack on, if the car was driving fine what's the worry
    I quite often say I'm going to do things.

    Then never do them.

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    Quote Originally Posted by 16Klappe View Post
    I wouldn't over think it, I would be more surprised to take a K04 off and it not be cracked.

    Swap it out and crack on, if the car was driving fine what's the worry
    Thanks mate. Infact, i had better get my skates on and get over to AET turbo's....

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    is it me.... or does the bolt holding the turbine look like it has a skull on it? on a serious note mine comes off this weekend for a rebuild so im expecting to find the same..

    Audi s3 goodwood green, BAM, n249 delete, 80mm TIP, s2000 air-filter, new turbo, ap coil overs, lots of poly bushes, 15mm spacers all round rolling on 18'' RSTT's

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    Haha no it really does!
    I quite often say I'm going to do things.

    Then never do them.

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    yeah it does, 1st and seconds picture

    Jardo get your specs out
    Word!!!

    My A3/Martys Golf would smash that, and this guys £7000 GT9743 supercharged love machine.

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    Spooky haha

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    Quote Originally Posted by Paradox1 View Post
    yeah it does, 1st and seconds picture

    Jardo get your specs out
    I said does! Get your specs out!

    I get the same thing though, driving our K03 monsters stationary objects are hard to focus on, racers vision and all that jazz.
    I quite often say I'm going to do things.

    Then never do them.

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    FML - KO4 Turbo

    Quote Originally Posted by ShaunS3 View Post
    Are there any tell tale signs of a cracked turbo? I.E. Unusual noises, loss in performance/boost pressure etc?
    Well funny you should mention that. I had a bizarre fluttering noise when the car was cold and the turbo spun up. Nobody could diagnose it but it went as soon as I swapped the turbo. Must have been from the cracks. As the turbo warmed up I'm assuming the cracks closed slightly and the noise went.

    Oh and the map that cracked the turbo also cracked my cylinder head I between the valves was a "Chipped UK" map. They've gone bust now so we can slag them off all we want
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    ShaunS3's Avatar
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    Quote Originally Posted by s3clarke View Post
    is it me.... or does the bolt holding the turbine look like it has a skull on it? on a serious note mine comes off this weekend for a rebuild so im expecting to find the same..
    Quote Originally Posted by 16Klappe View Post
    Haha no it really does!
    Quote Originally Posted by Paradox1 View Post
    yeah it does, 1st and seconds picture

    Jardo get your specs out
    Quote Originally Posted by s3clarke View Post
    Spooky haha
    I've just seen this and agree that it does....definitely spooky haha

  19. #18
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    Quote Originally Posted by Westy View Post
    Well funny you should mention that. I had a bizarre fluttering noise when the car was cold and the turbo spun up. Nobody could diagnose it but it went as soon as I swapped the turbo. Must have been from the cracks. As the turbo warmed up I'm assuming the cracks closed slightly and the noise went.

    Oh and the map that cracked the turbo also cracked my cylinder head I between the valves was a "Chipped UK" map. They've gone bust now so we can slag them off all we want
    I had the exact same symptoms when the car was cold, used to get a flutter until the car had warmed up a little. Also got some slight whining within the last few weeks.

    I was just slightly worried that the damage to the turbo could have been as a result of the map, but i believe it was done by a reputable company and have the receipt in the documents to prove it was mapped.

    Mind is a little more at ease now knowing that it appears a common failure for age/mileage and not something more sinister causing it to crack.

    Turbo is now back from AET Motorsport - Wakefield (dropped off at 10am, had it rebuilt to stage 1 spec and finished by 4pm) - Muchos Gracias to the lads, sorting me out at the drop of a hat when i really needed them to due to strict deadlines of my dyno day on Sunday. Pics to follow in my progress pics thread once the car is complete

 

 

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