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  1. #1
    mr fenn

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    brand new turbo fitted...=) 1.8t agu

    hello everyone,1998 1.8t agu engine,so i took my a3 off the road as it failed mot on exhaust emissions,asuming it was the turbo seals or turbo shaft,i just bought a new k03s at a cost and replaced it,car is running again, started 1st time after priming the engine,,new oil,oil filter,antifreeze,oil n water turbo lines,..but its still smoking more than normal? sounds abit "tappy" on top end...its due a cam belt change,but need to find cause of smoking,

    so ive searched the site for causes found afew things,eg stem seals n valve guides...also found worn piston rings...=(....before the new turbo,the car ran fine and boosted great always started no promlems,......car runs now with new turbo ive not drove the car,only had it on tick over,pushed it 2500rpm and lots of oil from exhaust still???any one out there that can help please..thanks

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  3. #2
    s3dave's Avatar
    TFSI Hybrid

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    That could be an expensive lesson, you are best finding the cause before swapping bits, but i guess you know that now.... sounds like valve stems or piston rings

  4. #3
    S3 Paul's Avatar
    6th Gear

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    If the turbo went ... the exhaust maywell be full of old engine oil.
    Takes quite a while to clear, even when driven,
    Is the tapping noise from the head? the timing belt area?
    I had the tensioner start to fail on the timing belt and it ratteled like hell.
    I would check the belt and tensioner, drop the oil and see what things are like then.
    What mileage is on the car?
    Noggy Blue 2001 S3

    I ask questions because i change my mind so much. If i ask questions you have already covered... just leave it be?

  5. #4
    Prawn's Avatar
    My other car is a MINI!!!!

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    also worth noting that an AGU with a ko3S fitted ought to be mapped to suit the turbo change....
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

  6. #5
    mr fenn

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    hey s3 paul thanks,yes tapping noise is timing belt area i think,,the miles is around 90000....only put the oil in lastnight??..what oil do you use? so maybe the exhaust has oil in it,...i will have a look at belt tensioner too......s3dave yes i know lol =)

  7. #6
    mr fenn

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    Quote Originally Posted by Prawn View Post
    also worth noting that an AGU with a ko3S fitted ought to be mapped to suit the turbo change....
    yes sorry its been mapped b4 to suit old k03s ,so it needs re-maping???

  8. #7
    S3 Paul's Avatar
    6th Gear

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    I use a thicker grade than standard 10/60w but that was because i used to drive hard.
    Take the timing belt cover off ( top part) and see if the sprung loaded tensioner arm will move with your fingers... mine did, the rattle was the arm slapping back and forward.
    Noggy Blue 2001 S3

    I ask questions because i change my mind so much. If i ask questions you have already covered... just leave it be?

 

 

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