White smoke a4 2.0 CR

[G4m8l3r]

Hi all. Just a quick question....I recently had to rush down a private road.... got to 80mph fairly quick....due to the design of the road I stopped at the end then drove back onto a public road at 30mph. There was zero smoke whilst doing this nor has my car ever smoked however when I stopped then set off to 30mph I noticed a small amount of white smoke behind me, it did clear in seconds and didn't do it again. Everything seems fine I just want to know what it could have been....

Thanks

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[Retroman]

For a modern CR diesel in good nick, I would guess it is just steam from moisture in the exhaust being pushed out by the heat produced.

 

[G4m8l3r]

I'd hope so. It's not done it since and everything else seems fine. Kept an eye on the temp and checked fluids under the bonet it all seems fine.

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[Retroman]

If you search the internet you'll see all sorts of "horror suggestions" about unburnt diesel and head gaskets failing etc. But if this was isolated event after a burst of speed and the car is in good nick it is, in my opinion, just likely to be steam. Moisture build up in exhaust systems is extremely common/normal and is the main reason that the latter 50% of exhaust systems eventually rust.

 

[dpaz]

Particularly this time of year.

If you're paranoid about it, get a friend to follow you and put your foot down and ask him if he saw any white smoke.

 

[AudiLeon]

As above. Get a mate to follow behind you. To a local pub, have a few and walk home. Don't worry about it. Grey and blue maybe.