Odd puff of smoke
#1
Odd puff of smoke
On a couple of occassions I have noticed that if I start the car then move it a few feet, turn it off and then restart it later there is a puff of smoke for a few seconds, obviously my heart skipped a beat.. It doesnt do it at any other time. Its a 2007 XKR with 60,000 miles FSH.
Ive had older cars in the past and when it was valve seals the car smoked literally all the time on startup
Any ideas please?
Ive had older cars in the past and when it was valve seals the car smoked literally all the time on startup
Any ideas please?
#2
What color is the smoke? If it's white and doesn't last long, it's probably water vapor and it's normal. A by-product of internal combustion of gasoline is water vapor, which upon shutting off the engine collects in the exhaust system. That's why you occasionally see water dripping out of the exhaust pipes of older cars. The heat from starting a cold engine cuauses the water in the exhaust system to boil out as steam vapor, which is the white smoke you see.
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ExKayRick (06-13-2024)
#3
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XKRAU (09-11-2024)
#4
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@markva44 , Like you said… its an 07. I have first hand experience with this. But as its just at startup and the level of oil barely drops between oil changes. (does not even need .25 l) I’m not going to worry about suggesting open heart surgery yet.
Look at it as “additional lubrication”, lol.
Out of interest, what oil are you running? Car calls for WSS-M2C-913B 5W30. But, I only used synthetic. Perhaps that is why that startup puff is just starting now, at 160,000 kms.
Cheers.
Look at it as “additional lubrication”, lol.
Out of interest, what oil are you running? Car calls for WSS-M2C-913B 5W30. But, I only used synthetic. Perhaps that is why that startup puff is just starting now, at 160,000 kms.
Cheers.
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Sean W (06-11-2024)
#7
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#10
True, but RING oil burning is persistent. If the valve guides are the oil problem, then the blackish smoke will only be on a cold start, and only for a couple seconds.
#11
Sorry, I meant oil smoke does not dissipate as quickly as water vapor after exiting the exhaust.
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Cee Jay (09-09-2024)
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