Blue smoke

[vw754]

Rs3 2019
No smoke in the morning or any other time , once cars warm still no smoke....but if I let it sit idling for 1 minute and give it a rev it throws blue smoke (bit smelly) then doesn't do it again if I rev it .... unless I leave it to idle for a minute , the longer it idles the more smoke.
No other issues with the car any idea?

 

[Karbonfaiba]

Valve stem seals according to your description.

While idling, high intake vacuum pulls oil past worn valve stem seals

Oil collects on top of the valves

When you rev it → that pooled oil gets burned → blue smoke puff

Once burned off, it stops until the next long idle.

 

[vw754]

If it's the valve stem seals , I would expect the oil to leak past the valves after sitting overnight and starting the car in the morning with some blue smoke that clears afterwards , I get no smoke first start , I've had valve stem seals symptoms on a car years ago , and that would start up in the morning and throw blue smoke which then cleared

 

[Karbonfaiba]

If it's the valve stem seals , I would expect the oil to leak past the valves after sitting overnight and starting the car in the morning with some blue smoke that clears afterwards , I get no smoke first start , I've had valve stem seals symptoms on a car years ago , and that would start up in the morning and throw blue smoke which then cleared

No worries, maybe it's the old story of the problematic PCV.

 

[vw754]

No worries, maybe it's the old story of the problematic PCV.

Hope so lol

 

[vw754]

Any idea of cost if it is valve stem seals?