Blue smoke on gearchange

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  • shark_90
    S2Forum Extremist
    • Mar 2007
    • 1475
    • Country: United Kingdom
    #1

    Blue smoke on gearchange

    I thought I noticed a puff of blue smoke the other day when hitting the throttle immediately after a gear change.. and today I've confirmed it. Short puff of smoke when going from 4th to 5th at speed. Can't really replicate it but it usually happens if I've powered all the way through 4th; if I change to 4th and go to WOT for a short time and then change, it doesn't do it.

    Diagnosis please chaps?
    1994 Audi S2 Avant - in pieces
    2006 Skoda Octavia vRS 2.0TFSi - goes fast
    1985 Audi 90 quattro - is wet

    Don't forget the East Midlands Meet -Last Tuesday of every month at 7:30pm just off M1 J28!![/COLOR]
    Tags: None
    • merlin's S4
      S2Forum Extremist
      • Jan 2005
      • 1539
      • Country: United Kingdom
      #2
      Smoke on gear changes usually points to worn turbo seals.
      '93 S4 Avant now back on the road complete with new shiny go faster bits.

        Comment

        • shark_90
          S2Forum Extremist
          • Mar 2007
          • 1475
          • Country: United Kingdom
          #3
          Ah ha, found the same thing elsewhere:

          Blue smoke usually indicates the turbo seal is damaged on the turbine side and oil is leaking from the turbo into the exhaust system.

          Is it a major problem or something I can live with for a while? Good excuse to change the turbo? Sounds like it's not particularly easy to fix!
          1994 Audi S2 Avant - in pieces
          2006 Skoda Octavia vRS 2.0TFSi - goes fast
          1985 Audi 90 quattro - is wet

          Don't forget the East Midlands Meet -Last Tuesday of every month at 7:30pm just off M1 J28!![/COLOR]

            Comment

            • Jon441cc
              S2Forum Fiend
              • Dec 2005
              • 2061
              • Country: United Kingdom
              #4
              worn out valve stem seals could be the cause Also have a check out the PCV breather system.
              sigpic

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