3.0 tdi Smoke on Cold Start-up - Problem ?

3.0 tdi Smoke on Cold Start-up - Problem ?

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Andy JB

Original Poster:

1,319 posts

220 months

Wednesday 4th March 2015
quotequote all
I note during winter my 3.0 tdi A6 2009 emits white/grey smoke on start up which smells quite acrid. It clears straightaway & doesn't omit anything when driving I am aware of.

Its a well maintained unit at 80k with fuel filters etc regularly changed & oil changes, premium fuel etc.

It does unfortunately these days get used for shorter journeys on cold but at least once weekly it gets a good blast.

I am sure it didn't do this last winter & only noticed it below 7degrees when glow plugs on.

Is this normal for these units /diesel in general or does this suggest a pending problem?

Andy JB

Original Poster:

1,319 posts

220 months

Wednesday 4th March 2015
quotequote all
Much less so Dr G but theres still a whiff but only when cold. I'd be interested to see when temp warms up above 7deg .