09-19-2021, 08:11 PM | #1 |
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Drives: 2012 335i coupes
Join Date: Oct 2016
Location: Lower Delaware
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2016 m6 grey smoke
I have a 2016 m6 48k miles. Catless, stage 2 tune, and project gamma intakes. Runs and drives great no codes. The other day when i was casually accelerating I look in my mirror and saw a grey puff of smoke a few feet behind my car. To day sitting at a stop sign I waited a few seconds and normally accelerated watched in my mirror and saw a puff of grey smoke coming from from car. I tried to replicate it by stopping and starting but I couldn't. The car has no smoke on cold startup or idling. Im leaning towards turbo seal based on what I read online. I am assuming I would have more smoke on startup and idling if this were valve stem seals. Any suggestions thanks
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09-19-2021, 10:26 PM | #2 |
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Drives: 2014 M6 Grand Coupe CP
Join Date: May 2017
Location: Kingwood TX
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That can be a sign of leaking valve stem seals or Crank Case ventilation valve.
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09-20-2021, 03:56 PM | #3 | |
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2015 M6 Gran Coupe> DME stage 3 tune back end flash>JB4 with Methanol control>Fabworx Catless downpipes>Full Meistershaft GTC exhaust 102mm GB tips>Built motor with Forged Cp Carillo Rods and Pistons > SSP spec X clutch > Stage 1 Pure Turbos>PG front mount intakes>PG charge coolers>Vorsteiner front and rear Carbon diffuser>Auto Tecknic Carbon shift paddles>3D Design aluminum pedals
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