White smoke when warm starting?

White smoke when warm starting?

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Babw

Original Poster:

755 posts

116 months

Monday 30th August
quotequote all
My track has which has a Toyota V6 (2GR-FE).

When cold starting there is nothing, oil consumption is no more than expected and no coolant being used. Not running hotter than normal and performance is as usual.

There is a lot of white smoke when re-starting a hot engine. I can't see any smoke in my rear view mirror when accelerating.

Could it be PCV related and clogged leading to oil getting into the combustion chamber somehow?

E-bmw

6,394 posts

122 months

Monday 30th August
quotequote all
White "smoke" from an engine is pretty much certain to be steam if there is no loss of coolant, it is the biggest product of the combustion process.

rigga

7,211 posts

171 months

Monday 30th August
quotequote all
Oil burning would be more grey smoke in colour, but you've already said oil consumption is not excessive, again, white is more condensation/water based.

GreenV8S

29,023 posts

254 months

Monday 30th August
quotequote all
White smoke suggests it's water but it's hard to make a definite conclusion just from the colour.

Hold some paper over the tailpipe while you start it and see whether it comes away oily or stinking of unburnt petrol. If the paper is damp with smelly water, it's either a cooling system leak or simply condensation blowing out of the exhaust. And if it isn't losing coolant, that would leave condensation.

Babw

Original Poster:

755 posts

116 months

Monday 30th August
quotequote all
Why is it happening when only hot starting is what I'm starting to figure. If it's condensation then surely it'll happen when cold too.

GreenV8S

29,023 posts

254 months

Monday 30th August
quotequote all
Babw said:
If it's condensation then surely it'll happen when cold too.
It probably does. Most engines do. And if you noticed it at all, you wouldn't pay any attention to it because that's what cold engines do. Point is hot engines can do it too, if the exhaust has cooled below 100C.

Evoluzione

6,787 posts

213 months

Tuesday 31st August
quotequote all
It's easy to tell, just smell it.
Also if it vanishes quickly it's steam, if it's smoke it drifts away or hangs around (wind dependent).