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Exhaust smoke & crack in exhaust - 996 c2

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHExhaust smoke & crack in exhaust - 996 c2

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coincidence

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Suspected cause

I don't think the exhaust crack/split would cause this , more likely a coincidence.

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Exhaust smoke & crack in exhaust - 996 c2
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Leading evidence: 'coincidence' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'coincidence' (1 discussions; 0 report identifying it and 1 suggest it). No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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coincidence

No successful repair reported for this finding.

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Discussions that suspect a cause
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Suspected cause

I don't think the exhaust crack/split would cause this , more likely a coincidence.

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Exhaust smoke & crack in exhaust - 996 c2
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4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • 911uk: 1 discussions

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POST 1 / ORIGINAL POSTEROriginal post

I'm hoping this is a non issue but it would be good to see if this has happened to anyone else: My exhaust started blowing last week - it was blowing on start up but then after 5 mins of driving. It looks like some nuts on an exhaust join have rusted causing it to come apart, then as I drive it warms up and expands and seals up. I started the car this morning, blowing as per usual, but it started with a cloud of blue smoke then settled into some whiteish smoke coming out. I didnt do a long run to see if it clears up. I can see where the exhaust is blowing, its between the engine and cat, so would this mean slighly smokey exaust is not so much of an issue? The blue smoke did concern me a little as this is prob oil. I have a big service coming up, so might just try not to drive till then. Engine sounds normal - not lumpy idle or rattle etc.

POST 2Original post

It's normal to get some smoke on startup but if it persists beyond say 5 seconds it could be your air/oil separator needing replaced. I don't think the exhaust crack/split would cause this , more likely a coincidence. Let us know how you get on.

POST 4Original post

If the crack in the exhaust is before the lambda sensors it will mean they are not able to meter the fuelling correctly. However, the car does not use them for the first~30s after the engine has been started as they're warming up. So symptoms do seem a bit odd. Probably wise to avoid driving until the servie.

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