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  1. #1
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    MK5 Golf 2.0 GT TDI - Turbo Issue

    Apologies in advance for the long story - as a complete non-technical person I need to put this issue in some kind of context...

    Basically bought the above referenced car from an independent dealer with a 3 month warranty.

    Was experiencing loss of power when in 5/6th gear - so took it to my local authorised VW garage for some diagnosis. Following the diagnosis, it was decided that a software upgrade was required and this would clear the fault. Great, free of charge. Thank you.

    Subsequently the same issue occured some 2 months later, complete loss of engine power whilst overtaking on a crawler lane (slightly more concerning as my new two week old daughter was in the back of the car!! But I digress...)

    Take it back to the same VW garage, and it is recommended that the turbo is changed out in its entirety (at an approximate cost of 1,200).

    I have two problems:

    a) if they had recommended this action during the initial diagnosis (where this inherent problem should have been identified by a prudent mechanic in my opinion), I would have been able to claim under the 3 month warranty; and

    b) I have no confidence that a new turbo is going to solve the issue either, considering the severe mis-diagnosis on the first issue, and the fact that when I asked the chap to explain his rational for suggesting the new turbo, he confirmed that there are no fault codes appearing.

    The thought of proceeding with the work, at a cost of 1,200, and trying to claw it back in the event that the issue reoccurs actually makes me laugh I'm so tired of it.

    Anyone else experienced any similiar issues? I've had more engine/car oriented friends suggest "MAF" or "waste gate" type issues for diesel turbos????

    Currenty driving the car with a faulty part, but no way to I want to proceed with the work as things stand.

    Any advice would be appreciated - again, sorry for the long post!

    Cheers in advance,
    Leenis

  2. #2
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    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    Hi Leenis,


    I'm a complete novice when it comes to car issues but i feel you have a very strong case to push the dealer for a corrective measure!

    The initial fix does not seem to have corrected the fault, especially if its the exact same issue.

    The only advise I can give you is that VW can be very good in goodwill situations. I think we have the same car and despite not having a perfect VWSH, 4 months after my warranty expired I had an injector fault whilst driving home on the motorway. VW covered 100% of the costs! I had a similar fault 6 months later and again VW covered 75% of the costs, bearing i mind by this point I was almost a year out of warranty.
    I appreciate that there is a very high probability that VW know there is a bigger issue which the injectors but they provided alot of support in covering the fault. PS - I was doing high mileage between the injector failures.

    I'm currently also experiencing a turbo issue which has been quoted at 1250 by VW but i'm unable to afford these costs so will be purchasing a reconditioned turbo for about 400.
    If VW do not provide any goodwill, which i doubt they'll do, gimme a shout back and I can talk you through a few options which I've found.

    Be sure to ask them to push the warranty issue for help in covering the costs.

    Good luck

  3. #3
    Administrator Crasher's Avatar
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    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    I am very surprised that there are no fault codes registered, in my experience a Golf 5 going into limp mode always leaves a code and I would expect yours to produce an over boost code. This problem is very common on your car and is nearly always a sooted up turbo. At a specialist like myself you would be looking at 900 all in for a rebuilt turbo with a 12 month warranty.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 8x18 Wolfrace Pro-Lite eco 2.0 wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  4. #4
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    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    Crasher....what about a situation where its logging an under boost? I take it thats typical of a turbo mechanical failure?

  5. #5
    Administrator Crasher's Avatar
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    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    Underboost is usually a sign of a leak in the vacuum system.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 8x18 Wolfrace Pro-Lite eco 2.0 wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  6. #6
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    Oct 2011
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    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    You don't really get intermittent turbo's. If there's exhaust gasses, it will spin or it will not, there's no intermittent about it. It will be either a sensor wrongly opening the wastegate or you have a boost leak from a pipe that's split or otherwise has a hole in it.

  7. #7
    Administrator Crasher's Avatar
    Join Date
    Apr 2006
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    Nottingham, England
    Posts
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    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    Or a sticking variable vane actuator ring.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 8x18 Wolfrace Pro-Lite eco 2.0 wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  8. #8
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    Sep 2011
    Posts
    3

    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    Thanks for the response folks - much appreciated.

    Following a further phone conversation with the workshop, they have confirmed* that it is an "overboost" that is causing the issue - and remain convinced that the turbo requires changing out.

    I am still holding off until I understand the problem fully before commencing with the work.

    Any comments/thoughts??

    Thanks in advance,
    Leenis

    * When I say confirmed, it could well be another guess based on their previous diagnosis methodology!!

  9. #9
    Administrator Crasher's Avatar
    Join Date
    Apr 2006
    Location
    Nottingham, England
    Posts
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    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    Search the tinterweb for Variable Geometry Turbo's or VNT. What happens is the carbon deposits from the combustion process coat the internals of the vane system causing it to stick, usually in a high boost position so generating an over boost fault code.

    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 8x18 Wolfrace Pro-Lite eco 2.0 wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  10. #10
    Junior Member
    Join Date
    Sep 2011
    Posts
    3

    Re: MK5 Golf 2.0 GT TDI - Turbo Issue

    Interesting Crasher, thanks again for taking the time to respond.

    Can you give an example where such a fault code would NOT appear?

    I must stress that in each and every instance - even when the garage claim to have replicated the failure mode (which I don't believe they did) - that there has been no fault code appear. This is the thing that baffles me, and the only reason that I'm not going ahead with the work.

    I'm sure there is a perfectly good reason - but I need an explanation in simple terms. To date VW can't provide such an explanation - which is made especially frustrating when friends/colleagues/forum members suggest there should be a code appearing in this regard.

    Cheers.


 
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