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Q7 Please help timing chain possibly jumped

786sam Sep 10, 2018

  1. 786sam

    786sam New Member

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    Was driving fine the night before. The next morning the car sounds like a tractor and there's no revs!!



    Got an audi tech to check errors but none at all. I have come to the conclusion there is a mechanical fault. Possibly timing chain has jumped a teeth or 2 :(

    Has this ever happened to anyone else? There's also loads of white smoke coming from the exhaust which smells of unburnt fuel. Please check YouTube vid for the noise it's making and also staking quite violently.

    Only revs a little when warmed up 90'c and also hesitates when put in gear (500-600 rpm)

    Can anyone shed some light please
     
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  3. DaveW1946

    DaveW1946 New Member

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    Lawyers in Australia and the USA are examining claims against Audi that several of their cars have been fitted with defective timing chains and tensioners, resulting in early engine failure and unsafe vehicles. Is anything being pursued in the UK about this issue?

    Vehicles affected are: 2008 - 2012 A3, A4, A5, Q3, Q5, TT

    My granddaughter’s A3 timing chain slipped and wrecked the engine at 88,000 miles.
     
  4. 786sam

    786sam New Member

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    Mines done just over 150k miles so I think it might be out of any kind of warranty available unfortunately
     
  5. DaveW1946

    DaveW1946 New Member

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    Noted with thanks. My granddaughter’s affected car is an Audi A3 Sport 197 TFSi 2008 1984cc and it’s vin identifies the engine brand, size and type as ZZZ8P.
     
  6. Brownie q7

    Brownie q7 New Member

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    Hi Sam any update on this?
     
  7. 786sam

    786sam New Member

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    No mate I have had every tom **** and Harry plugging in their computers but nothing!!
    Have you got similar symptoms? If just checked some YouTube vids and some say it could be injector seals/washers? Not sure at all...
     
  8. Brownie q7

    Brownie q7 New Member

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    Yes very exact same thing tho mine started noising on the motorway so stopped and topped up oil as it was low and overdue a service so I thought maybe an oil channel up to the tappets got clogged, got the car home and done an engine flush and replaced oil and filter, done about 10 miles and now engine is shaking,no revs and sounds exactly like your video
     
  9. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User TDi Audi A4 Audi Avant Owner Group quattro

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    Possibly an injector sticking open. What year is the car? Worth doing a compression test . If the timing had slipped I would expect that a fault code would be generated.
     
  10. 786sam

    786sam New Member

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    I'm thinking of taking the injectors out 1 by 1 and checking the injector seals/washer... Will post back with results
     
  11. 786sam

    786sam New Member

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    Mine is a 2008 model.. my brother had a similar symptom on a Mercedes 220d and mentioned he had 1 faulty injector and that had sorted the issue... is there a tool that's not too expensive for me to test for compression at home?
     
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  13. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User TDi Audi A4 Audi Avant Owner Group quattro

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  14. 786sam

    786sam New Member

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    Thanx for the vids. Very informative. I have just taken the MAF out and now the car revs freely but still shakes violently and smokes like **** lol

    Can I recondition the injectors myself using brake cleaner and air?
     
  15. Brownie q7

    Brownie q7 New Member

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    Sam I have all fingers crossed here mine is 2008 aswell I really hope this is an injector and not chain
     
  16. 786sam

    786sam New Member

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    Update....
    I was trying to take the injectors off when suddenly I see something loose near injector 5 on passenger side.. it's in the engine side not on top. Looks like it's a rocker follower or something like that. Looked like a small plate or something. Will be taking the cover off to see what's going down.

    Any tips or advise I would be greatful
     
  17. Brownie q7

    Brownie q7 New Member

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    If possible can you take some pics when you are doing it
     
  18. 786sam

    786sam New Member

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    What a nightmare!! I thought it was just the injectors but what I found is 5 out of 6 rocker followers had smashed and were making the rattling noise!! Here are some pics to follow
     
  19. 786sam

    786sam New Member

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  20. 786sam

    786sam New Member

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  21. 786sam

    786sam New Member

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  22. 786sam

    786sam New Member

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  23. 786sam

    786sam New Member

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  24. 786sam

    786sam New Member

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    has anyone any guides on how to take the camshafts out without disrupting the timing and also allows me access to the disintegrated cam followers...
     
  25. mxnrg

    mxnrg Well-Known Member Team Daytona TFSI Owners Group Team V6 SQ5 owners group Audi Q5 MQB Platform

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    Depending on how handy you are, that looks like a job for a professional :(


    Sent from my iPhone using Tapatalk Pro
     
  26. Brownie q7

    Brownie q7 New Member

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    O fukkkkk
     
  27. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User TDi Audi A4 Audi Avant Owner Group quattro

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    Not good at all. With that much damage the only thing I can think is the timing has slipped and there has been contact between valves and pistons. The rockers are sacrificial being the weakest point in the system.
     
  28. 786sam

    786sam New Member

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    No mechanic wants to touch it!!!
    Looks like just gotta find some lucky guy looking for a project... My poor baby :(
     
  29. 786sam

    786sam New Member

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    Thank you guys but this baby is going up for sale..... I might be back... :)
    Hope yours is ok brownie q7 bro
     

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