I realize this topic has been discussed before but, I didn’t see anything super recent or exactly what I’m seeing - it’s been a common issue, at least to a point with newer Volskwagen 1.8T & 2.0T Gen3 engines that a buff of white/blue smoke is seen at startup, and sometimes also under heavy acceleration.
I have a 2019 Jetta GLI, 2.0T on an Integrated Engineering tune. Current mileage is 37k, I’ve noticed this happening since around 25k. Occasionally I’ll have the smoke on startup, and I often have it under heavy acceleration or when doing a pull. It’s not constant, it’ll be one large puff of smoke and then it’s over with.
Some seem to think it’s PCV, some say valve stem seals. My independent VW mechanic’s opinion is that it’s most likely either injector haze, or PCV, as he believes that if it was the valve stem seals, I’d have an oil burning problem as well, which I don’t.
My question is this - has there been a definitive answer as to whether it’s the valve seals, PCV, or something else entirely? Secondly, if we say it’s the valve stem seals, what is the risk if you continue driving? I’ve read some people have had the issue for 50k miles or longer with no adverse effects. Likewise, I’ve noticed it for 12k, and almost a year with no ill effects. It sounds like something that could be a major issue, but yet I haven’t found a single case of someone who’s engine has blown, or even suffered major damage from this.
FWIW, oil used is Mobil 1 ESP 0w30 (VW 504/507) every 5k. Dipstick level never drops below minimum in that timeframe, if it moves at all. Thanks gang!
I have a 2019 Jetta GLI, 2.0T on an Integrated Engineering tune. Current mileage is 37k, I’ve noticed this happening since around 25k. Occasionally I’ll have the smoke on startup, and I often have it under heavy acceleration or when doing a pull. It’s not constant, it’ll be one large puff of smoke and then it’s over with.
Some seem to think it’s PCV, some say valve stem seals. My independent VW mechanic’s opinion is that it’s most likely either injector haze, or PCV, as he believes that if it was the valve stem seals, I’d have an oil burning problem as well, which I don’t.
My question is this - has there been a definitive answer as to whether it’s the valve seals, PCV, or something else entirely? Secondly, if we say it’s the valve stem seals, what is the risk if you continue driving? I’ve read some people have had the issue for 50k miles or longer with no adverse effects. Likewise, I’ve noticed it for 12k, and almost a year with no ill effects. It sounds like something that could be a major issue, but yet I haven’t found a single case of someone who’s engine has blown, or even suffered major damage from this.
FWIW, oil used is Mobil 1 ESP 0w30 (VW 504/507) every 5k. Dipstick level never drops below minimum in that timeframe, if it moves at all. Thanks gang!