[Bxrger]

So today I went to get my 2016 340i serviced for just regular oil change at the local shop, when they were pulling it in a loud noise then a lot of smoke poured out the exhaust and they said some out the engine bay. From reading on many forums I'm starting to thing it's the pcv diaphragm since I let idle excessive before. Praying it's not turbo related or anything but if so I still have Carvana warranty that will
Cover it but at select spot and need proof of malfunction. Any thoughts on what else the white smoke could be? I'm also having my crank case hose changed due to code it was throwing, maybe could of been that?

[E90ROXS]

pcv

https://www.bimmernetwork.com/produc...eplacement-kit

[Bxrger]

Originally Posted by E90ROXS

pcv

https://www.bimmernetwork.com/produc...eplacement-kit

That's what I had suspicions of so I went ahead and bought the replacement off Amazon, it doesn't come with the spring and cap tho will that be fine? I'm assuming I can reuse my old one

[Bxrger]

Originally Posted by E90ROXS

pcv

https://www.bimmernetwork.com/produc...eplacement-kit

And should I not be driving it ? The shop said they didn't see any smoke coming out after finishing oil change and driving it on highway

[Info@mad-us.com]

Maybe they just spilled some oil and it burned off. Odd that it would just go away if there was an issue.

A turbo usually blows white blue smoke out the exhaust only unless it has an external leak as well.

[Bxrger]

Originally Posted by Info@mad-us.com

Maybe they just spilled some oil and it burned off. Odd that it would just go away if there was an issue.

A turbo usually blows white blue smoke out the exhaust only unless it has an external leak as well.

This was prior to the actual oil change, they were just pulling it into the bay then they Heard a loud noise in the bay following heavy smoke out of it and exhaust but then stopped smoking in bay and only out exhaust until finally dissipating

[Info@mad-us.com]

Originally Posted by RipnDip

This was prior to the actual oil change, they were just pulling it into the bay then they Doug a loud noise in the bay following heavy smoke out of it and exhaust but then stopped smoking in bay and only out exhaust until finally dissipating

Hmm thats a very odd. I'd probably go get it looked at if it smokes again.

[Bxrger]

Originally Posted by Info@mad-us.com

Hmm thats a very odd. I'd probably go get it looked at if it smokes again.

I'm really thinking and hoping it's just the pcv diaphragm that will come in Thursday and I will replace, also replacing crankcase hose

[Wires]

What do you mean by "loud noise". PVC would just be silent and it would start burning off oil. That explains the smoke, but not the sound.

[Bxrger]

Originally Posted by Wires

What do you mean by "loud noise". PVC would just be silent and it would start burning off oil. That explains the smoke, but not the sound.

Unfortunately I was in the front so I didn't hear or see it but they had me come in the back and see the smoke pillowing out, so to be fair I don't know what kind of loud noise it was they just mentioned some sort from the engine bay before the smoke came

[markoz28]

I had this same situation happen and it was the PVC. It was under warranty and the dealership replaced the entire intake manifold.

[Info@mad-us.com]

Originally Posted by markoz28

I had this same situation happen and it was the PVC. It was under warranty and the dealership replaced the entire intake manifold.

They would replace your valve cover.

[markoz28]

Originally Posted by Info@mad-us.com

They would replace your valve cover.

Yes, I believe you are correct. Its just the entire top end plastic thingy. lol

[Info@mad-us.com]

Originally Posted by markoz28

Yes, I believe you are correct. Its just the entire top end plastic thingy. lol

Yup thats it

[not1337]

PCV makes a loud whining sound when failing along with lots of white smoke. It happens when you idle for too long, it will come back. There is a hole in the plastic diaphram. Careful when removing the cap. You can reuse it but its brittle and cracks easily, i would order a backup kit with the cap just in case.

[Bxrger]

Originally Posted by not1337

PCV makes a loud whining sound when failing along with lots of white smoke. It happens when you idle for too long, it will come back. There is a hole in the plastic diaphram. Careful when removing the cap. You can reuse it but its brittle and cracks easily, i would order a backup kit with the cap just in case.

There's virtually no noise now or anything from the engine bay, i retuned it back to stock dme for now and just babying. Still however smell oil or some type of burning

[E90ROXS]

Just pry the cap and take a look at the diaphragm. There is be a slit or a hole if it's bad.

[Bxrger]

Originally Posted by E90ROXS

Just pry the cap and take a look at the diaphragm. There is be a slit or a hole if it's bad.

What are the chances of breaking the cap while taking it off?

[E90ROXS]

Originally Posted by RipnDip

What are the chances of breaking the cap while taking it off?

If I remember correctly there should be 3 tabs on inside of the edge. That's where you want to pry and be careful. If you get one out then the other 2 will come out easily.

[not1337]

Originally Posted by RipnDip

There's virtually no noise now or anything from the engine bay, i retuned it back to stock dme for now and just babying. Still however smell oil or some type of burning

It will come back if you idle for a couple minutes

[Bxrger]

Originally Posted by not1337

It will come back if you idle for a couple minutes

So far I've driven it to and from work just babying it and sat indling for a minute or two and no noise and just slight smoke out back, when starting everytime there seems to be a lot of water or clear liquid leaving the tail pipe decent amount everytime, might just be condensation and I'm overthinking

[Bxrger]

After taking over the pcv cap it was clear to see it had a nice little rip in it and who would of know that would of caused all this, had ordered a new diaphragm from Amazon and it arrived today so I put it in immediately and after that all has been good. Only thing I didn't do was put gasket sealer on it. Does anyone know that it is a necessity to put on the sealer around the cap or is it fine just snapped into place?