35d blue smoke on cold start

[stabmasterflex]

Anyone out there experiencing this issue? Vehicle has full emissions delete. From what I've seen, the valve seals were not an issue on the m57. Was wondering if cleaning out the ccv is an option? Or I have a turbo leaking? It has a tune but I'm quite certain this is oil being burnt off. Cannot see any signs of oil burning after the start up. Doesn't puff blue after a long idle session either.

Vehicle has over 200,000kms. Thanks for your input.

[sunny_j]

My guess would be your VCG

[stabmasterflex]

Valve cover gasket? How so?

[josiahg52]

I have this also occasionally. Like you, it's only on some startups, never during idle or when taking off from a stop light, etc. It figured it was the turbo seals or just the atrocious vapor recovery system.

[sunny_j]

White smoke on cold start in colder climates is normal as that's most likely condensation. Blue smoke in most cases is VCG.

It's about a 8-12 hour DIY
https://youtu.be/x5o-SaJ1lDw

[ard]

Originally Posted by sunny_j

. Blue smoke in most cases is VCG.

Is this due to the 'inner' seal on the VCG? Looks like if that fails, crankcase gas/oil vapor can then enter the intake tract?

[stabmasterflex]

Yeah, I just watched that linked video, I'm not understanding the correlation.
I watched another video from fixmyeuro. That makes some sense with pressurizing the crankcase but I don't have any oil leaks.
Still the same issue?

[ard]

Originally Posted by stabmasterflex

Yeah, I just watched that linked video, I'm not understanding the correlation.
I watched another video from fixmyeuro. That makes some sense with pressurizing the crankcase but I don't have any oil leaks.
Still the same issue?

Watch the second video. There is an ‘outer’ seal, **and** an ‘inner’ seal.

The space between the two is exposed to ‘crankcase pressure’... If the outer seal fails, then oil leak to the exterior.... But if the issue is the inner seal, the oil doesn’t leak out- it leaks into the intake tract.

I think. Mine is fine so far.

[sunny_j]

Originally Posted by ard

Is this due to the 'inner' seal on the VCG? Looks like if that fails, crankcase gas/oil vapor can then enter the intake tract?

this is my guess. when I changed the vcg in my x5, most of it was still pliable expect the inner seal around cylinder 5 & 6. there it was quite crispy and it broke apart when removing it.

op. since you are deleted and and I'm assuming the turbo is in good health, the next logical cause would the the vcg. especially at 200km

[stabmasterflex]

Agreed. I'm going to try this and report back.