Issue with Turbo Installation?

  • LmarM's Avatar
    So originally I had the clutch and flywheel changed, and following this on the same day, by car would redline every now and then and also smoke continuously came out the exhaust.

    The car is a 2017 Audi A3 TDI, Manual, 1.6L



    Following this, I took it to the mechanic that changed the clutch and flywheel and he claimed that even though it occurred the same day we took the car from him, that its unrelated and not his fault.


    I took it to a separate mechanic, he said the crank seals damaged and the turbos gone, so he had put in a reconditioned turbo and new crank seal.


    After this, the car was making a whistling noise whilst driving, and was ever so slightly slower. The redlining and smoke out the exhaust still continued, and I found that oil was leaking out the front.


    I took it back to the mechanic, he found that the rocker cover was filthy, so he ordered a new rocker and cleaned the injectors, and he also took out the intercooler and cleaned it alongside any other stuff that needed cleaning.


    Following this, the redlining and smoke out the exhaust stopped, but the car wouldn't pick up speed, it took over a minute to go from 0 to 60, and bare in mind it would not go past 59 even whilst flooring the accelerator. It was much, much slower. Following this, when occasionally letting go of the accelerator, the car would jitter and pick up a small bit of speed for half a second. The car also stalls more easily and has issues reversing.


    Mechanic says that the turbos gone, but claims that as oil has leaked into it, its not an issue of defectiveness and no longer under warranty. I've asked others and they've told me that during the first installation, the oil feed pipes and the intercooler should have been cleaned and checked, and that th rocker is irrelevent to the issues caused, and thus the replacement turbo blew out due to improper installation/procedure followed and its upon the mechanic to fix this? Upon the 2nd visit, I was also told the oil is dirty from what they saw during the first visit, but this wasnt mentioned to me when the I picked it up aftet that first visit, otherwise I would have happily paid for an english flush.

    I have been infotmed its partially my fault in the sense that I haven't serviced the car in 15k odd miles, but as for the rest, do you guys think that the mechanic didnt follow proper procedure during the first installation and should be held reliable for fixing it? So far I have paid £2100 in total.
  • 3 Replies

  • olduser's Avatar
    Oh dear what a sad tale.

    It is difficult to pick a way through your story, it is possible a 2017 car could need a new clutch, flywheel just about possible.
    A leaking oil seal at the flywheel end of the crankshaft, would have been noticeable when the clutch was exposed (engine oil in the bell housing), if a flywheel is refitted clumsily they oil seal may be damaged.

    Fitting a replacement turbo should involve checking oil supply to turbo - dirty oil, do oil change.
    With a refitted turbo on and whistling, I would start by looking at the turbo installation, it's probably leaking air.

    Dirty rocker cover - clean it, simple. Leaking rocker cover, replace gasket after all mating surfaces have been cleaned and inspected for damage

    If car is not running right, it MUST be attended to immediately, don't keep running.

    Dirty oil/ lack of servicing, will damage turbo's - they run very fast so need a good flow of oil, sometimes the oil is doing a cooling job as well as lubricating.

    I hope you can pick out from this something that helps.
    Last edited by olduser; 01-12-25 at 15:05.
  • NMNeil's Avatar
    The garage did'nt fit a new turbo, it was reconditioned. This could mean it either came from a reputable rebuilder or one who did it on the cheap.
    Exhaust smoke is quite common after a turbo replacement because the oil that leaked into the exhaust system will still be in the catalytic converter and silencer(s) and take a while to burn off, but that won't explain the poor performance and whistling.
  • Rolebama's Avatar
    As an aside, never rev the engine before turning it off. Turning engine off means no oil flow to the turbo, and revving could take the turbo up to 10,000rpm or beyond, with no oil flowing through as it spins down. Not good.