Blue smoke from deceleration

[cesarortiz23]

You guys so I have been doing a bunch of research about this topic

There is a lot of threads but there isn't a specific fix or if they found the problem etc.

they are all over the place not really the problem I am having.

Anyways this is what my car is doing

my thought is turbo seals but can someone confirm with me or any one have any suggestions

my car throws blue smoke when the car is fully warm and only on deceleration when coming to a stop

Or when i have it on manual mode and I keep a steady at 3k rpm driving for example in first gear.


there is days where is really bad or there is days when it's not as bad


Also if I drive the car normal I would never see smoke through out the day

Only when driving hard and do downshifts and come to a stop boom a cloud of smoke would come out.


Anyone have any suggestions


It doesn't throw smoke on idle

it doesn't throw smoke while accelerating
doesn't throw smoke while driving normal.
:


If it is turbo seals what's my best bet?
Just do like stage 1 turbo from vargas or pure ?

Would that solve the problem ? Or?

I would appreciate the help guys

Thanks....

[iminhell1]

My feeling is that it's a vacuum/pressure transition problem in the PCV system. A crack in the Valve Cover, blockage (reduced flow through) in the swirl portion of the valve cover, leak on the vacuum pump side (brake booster, BCS's, muffler flap).

I have a similar issue and really haven't dug too deep into it, actually not at all.
But i really don't feel it's a turbo or engine problem. It really seems more a vacuum leak problem.


If you have old logs, compare your wgdc's. That should show if you've developed a vacuum leak.
Or leak test. Sure fire way to find the leak.

[cesarortiz23]

Originally Posted by iminhell1

My feeling is that it's a vacuum/pressure transition problem in the PCV system. A crack in the Valve Cover, blockage (reduced flow through) in the swirl portion of the valve cover, leak on the vacuum pump side (brake booster, BCS's, muffler flap).

I have a similar issue and really haven't dug too deep into it, actually not at all.
But i really don't feel it's a turbo or engine problem. It really seems more a vacuum leak problem.


If you have old logs, compare your wgdc's. That should show if you've developed a vacuum leak.
Or leak test. Sure fire way to find the leak.

Ima have to look into those things

So you think is not a turbo seal

I wonder if having a bad turbo seal is these fact same symptoms ?

Cuz I seen videos of bad turbo seals and is a constant smoke and my car doesn't do that so I'm confused

[iminhell1]

Yes, turbo is generally a constant leak/smoke.
Your (my) problem is between the vacuum and boost crossover point, around that 3,000 RPM point. I think it's something with pressure getting into the crankcase and forcing a little oil out the valve seals (weakest link).
I have the RB pcv and I'd imagine you have stock. So I'd say we can rule out a bad PCV. That leaves the flapper valve and valve cover itself. Which are both my suspicions prior to your thread for myself.
At some point I am going to remove my vc and try steam cleaning the swirl separator thingy. I really don't want to buy a new vc.

[cesarortiz23]

Originally Posted by iminhell1

Yes, turbo is generally a constant leak/smoke.
Your (my) problem is between the vacuum and boost crossover point, around that 3,000 RPM point. I think it's something with pressure getting into the crankcase and forcing a little oil out the valve seals (weakest link).
I have the RB pcv and I'd imagine you have stock. So I'd say we can rule out a bad PCV. That leaves the flapper valve and valve cover itself. Which are both my suspicions prior to your thread for myself.
At some point I am going to remove my vc and try steam cleaning the swirl separator thingy. I really don't want to buy a new vc.

You think adding a oil catch can
Will maybe fix the problem

I was thinking of starting off there and see if that helps a bit

Ima have to let my mechanic know what you just told me

It sounds like it can maybe be that instead of turbo seals

[iminhell1]

And since I'm on the PCV thought I'll explain it's function since it's very misunderstood.

This graph is from my other car and was created based on math (not sensor data).
It's the center purple line you need to look at. That is the air volume fluctuation in the crankcase ... in most cars you remove the oil cap and you hear that cyclic flub flub flub, this is why. And it's why a PCV is so important. If it wasn't there, or working correctly, pressure would build in the crank case and it would have to find a way out, which generally follows with an oil leak, or smoking issue if the leak is a valve stem seal.

[iminhell1]

Originally Posted by cesarortiz23

You think adding a oil catch can
Will maybe fix the problem

I was thinking of starting off there and see if that helps a bit

Ima have to let my mechanic know what you just told me

It sounds like it can maybe be that instead of turbo seals

Does it still smoke once you get to the add oil mark?
I'll bet if it does it's not nearly as bad. And that's because there is now more volume in the crank case.
Again, points to valve cover flow issue IMO.

[tock172]

Blue smoke (burnt oil) present upon deceleration is almost a symptom of of worn valve guides and seals in the cylinder head which are allowing oil to get sucked into the combustion chamber. This is true of just about any car, turbo, NA, foreign, domestic, etc.

[iminhell1]

Originally Posted by tock172

Blue smoke (burnt oil) present upon deceleration is almost a symptom of of worn valve guides and seals in the cylinder head which are allowing oil to get sucked into the combustion chamber. This is true of just about any car, turbo, NA, foreign, domestic, etc.

In old times, maybe.

But with something that runs a vacuum pump flowing into the crank case, I wouldn't bet on it.

[cesarortiz23]

Originally Posted by iminhell1

Does it still smoke once you get to the add oil mark?
I'll bet if it does it's not nearly as bad. And that's because there is now more volume in the crank case.
Again, points to valve cover flow issue IMO.

Yeah actually yeah I think there has been a time where it was low on oil and it did still did smoke but I can't really 100% recall or maybe when it needs oil it doesn't really smoke as bad

Like how it Is doing now for example with fresh oil


Today I just did the oil change so I'm all topped out now

[tock172]

Originally Posted by iminhell1

In old times, maybe.

But with something that runs a vacuum pump flowing into the crank case, I wouldn't bet on it.

Yes, even on a vehicle with a pressurized crank case. The compression of the engine is greater than any vacuum pump, and reverses the flow of oil in the head and sucks it past the valves into the combustion chamber.

Worn valve guides and seals have been a common wear part on specific BMW engines in the past, and a larger, hot engine like the N54/N55 in a small car like the 135i could very well generate the latent heat capable of causing premature wear.

[cesarortiz23]

Originally Posted by tock172

Yes, even on a vehicle with a pressurized crank case. The compression of the engine is greater than any vacuum pump, and reverses the flow of oil in the head and sucks it past the valves into the combustion chamber.

Worn valve guides and seals have been a common wear part on specific BMW engines in the past, and a larger, hot engine like the N54/N55 in a small car like the 135i could very well generate the latent heat capable of causing premature wear.

what do you recommend me to do at this point


So is not the turbo seals



What do you recommend replacing because I want to fix this problem ASAP

Is getting annoying and I don't like driving my cars like that :

[tock172]

Get the opinion of a trusted professional. Don't throw parts at the problem.

[iminhell1]

I have to correct myself. I thought we where talking about a N54. The OP has a N55. PCV system functions different, serves the same purpose though.

Here is how the N55 system works --> http://www.1addicts.com/forums/showthread.php?t=1293481

[cesarortiz23]

so maybe this weekend I am going to get my car diagnosed finally

Because man my exhaust smells like crazy

I come to a red light even tho there is no smoke cloud I still smell the burn oil so bad and it is very annoying

Funny thing is that the car runs GREAT.!!!!

:

[Mybimmer]

Blown turbo seals will smoke more often than decel. I'd be looking at PCV or worst case valve stem seal or valve guides. How many K's/miles on the engine?

Don't throw parts at it until you know for sure. I'd be taking it to an well regarded indy for diagnosis.

[07tundra]

Blown turbo seal is your culprit. Had the exact same issue and I swapped my turbos no more smoke. Now you have someone diagnose of course they are going to come back with multiple items that are wrong so they charge you an arm and a leg.

[cesarortiz23]

Originally Posted by 07tundra

Blown turbo seal is your culprit. Had the exact same issue and I swapped my turbos no more smoke. Now you have someone diagnose of course they are going to come back with multiple items that are wrong so they charge you an arm and a leg.

Yeah I came to the conclusions that it is my turbo seals


So I'm thinking of doing a turbo upgrade

Stage 1

[07tundra]

Originally Posted by cesarortiz23

Yeah I came to the conclusions that it is my turbo seals


So I'm thinking of doing a turbo upgrade

Stage 1

I'd look at turbolabs of America 1050 out the door! and perform awesome and yes they are slightly upgraded