[bahn]

Just a heads up, I will be performing the PCV "repair" tonight after work.

The repair procedure can be seen here: https://vanos-bmw.com/product/membra...er-11127570292

Hopefully there's a tear in the membrane and I'm not just blowing smoke up my own ass

I'll keep everyone posted.

[Supra2k6]

same here completely catless and aftermarket exahust i loose 1/4 every few thousand miles.

Exhaust tips are wet black on the inside i smoke a lot on decel coming to a stop 85% of the time for the remaining %15 it doesn't happen at all.

started ever since i added inlets and dps.

i had mhd since it came out but the cats could have been masking it.

i'm afraid it's my turbos event tho they pull strong.

pcv valve is working tested it while replacing the VC gasket.

installing stock exhaust soon until i get new turbos.

While doing dps i would see drip coming of the turbo chra unit but car has only 60k miles.

[bahn]

Originally Posted by bahn

Just a heads up, I will be performing the PCV "repair" tonight after work.

The repair procedure can be seen here: https://vanos-bmw.com/product/membra...er-11127570292

Hopefully there's a tear in the membrane and I'm not just blowing smoke up my own ass

I'll keep everyone posted.

Just finished the repair. The stock diaphragm wasn't cracked or leaking but it was nasty under there with "scales" and chunks of carbon built up around the center plug and base where the diaphragm seals. I cleaned it all up, put the new diaphragm in and sealed it back up. I used a cyanoacrylate super glue (as the directions state) and followed that up with automotive goop to create a thick seal. I used a hair dryer to assist in the drying/curing process. It still stumbled on startup but the vacuum under the oil cap does seem less. The next startup was much smoother. Tomorrow morning will really tell the difference.

[EB89]

My cars been asking to add 1L of oil a few months after each change.

[D's Bimmer]

Originally Posted by WedgePerformance

If you're burning enough oil to have a blue tint or see smoke then you have other issues.

The smoke I am seeing is from fuel or oil. Confirmed this at a very reputable tuning shop. Guess these tunes mix more fuel for safety reasons and it is just more noticeable on WOT with the Catless DP.

As for oil, I have switched to Liquimoly 5w40 with the oil additive and the needle hasn't moved in 2600kms

[bbnks2]

Oil was down again 1/2qt. Just seems to be blowby...

Or it's my oil sensor. I'll have to change the oil to confirm I'm not overfilled now.

[007_e350]

One time I was pressurizing the intake to check boost leak,I had downpipe off also for another task, however when all set and done I went back to put downpipe back and saw the oil swept out of rear turbine in the turbo, if car was running this oil would've burnt! Viola that's where my oil was going, most of the time it's the rear turbo seal for some reason

[bbnks2]

Originally Posted by 007_e350

One time I was pressurizing the intake to check boost leak,I had downpipe off also for another task, however when all set and done I went back to put downpipe back and saw the oil swept out of rear turbine in the turbo, if car was running this oil would've burnt! Viola that's where my oil was going, most of the time it's the rear turbo seal for some reason

Just did my clutch and had my exhaust off. No signs of leakage from rear turbo seal. All signs point to normal blow-by from increased boost.

Also noted that oil shot out of my oil cap recently. Not sure if that's a bad sign or not lol... I don't think my PCV system has failed but it seems like it could use an upgrade... Oil cap was missing the rubber seal, but still, it has never leaked before so it was weird to see oil sprayed up onto the hood.

[JETmn]

Originally Posted by 007_e350

One time I was pressurizing the intake to check boost leak,I had downpipe off also for another task, however when all set and done I went back to put downpipe back and saw the oil swept out of rear turbine in the turbo, if car was running this oil would've burnt! Viola that's where my oil was going, most of the time it's the rear turbo seal for some reason

This is the N55 section :P

[Welcome to NBA Jam]

Originally Posted by bahn

Just a heads up, I will be performing the PCV "repair" tonight after work.

The repair procedure can be seen here: https://vanos-bmw.com/product/membra...er-11127570292

Hopefully there's a tear in the membrane and I'm not just blowing smoke up my own ass

I'll keep everyone posted.

This is really helpful info. I had no idea that's what the big canister was. It'd be great if someone figured out a way to modify it with a threaded plastic top with an integrated O-ring for easy future replacement. Just JB-weld a threaded bottom and screw on the new top. Think like the oil filter housing.

Psst! Looking at you, Mishimoto!

[JETmn]

Originally Posted by Welcome to NBA Jam

This is really helpful info. I had no idea that's what the big canister was. It'd be great if someone figured out a way to modify it with a threaded plastic top with an integrated O-ring for easy future replacement. Just JB-weld a threaded bottom and screw on the new top. Think like the oil filter housing.

Psst! Looking at you, Mishimoto!

You forgot to link them! mishimoto

[indyn]

Originally Posted by bahn

Just a heads up, I will be performing the PCV "repair" tonight after work.

The repair procedure can be seen here: https://vanos-bmw.com/product/membra...er-11127570292

Hopefully there's a tear in the membrane and I'm not just blowing smoke up my own ass

I'll keep everyone posted.

Did you do this with the valve cover removed from the top of the engine?

[TheLeusOne]

There is a natural amount of oil blow by and burn in turbo engines that occurs. I don't think it's the tune itself, but as people are stating, you are adding lots of power/more demand on the existing seals likely resulting in the increased blow by/consumption. I saw this problem a lot years ago in my tuned 300zx twin turbo. It was excaserbated after I added larger turbos and upped the boost. Keep a close eye on it and always roll with a spare quart. I wouldn't worry too much.

[Twisted Tuning]

Also, keep in mind on Direct injected cars that you do NOT want oil temps too low. Higher oil temps are there to keep the Fuel/Oil dilution under control. Or better yet keep in manageable. DI engine dilute oil very fast with fuel and is one of the main reasons they have these car run higher oil temps.

So with that, lower oil temps (<220*) will increase fuel/oil dilution and as a side effect, also have a tendency to increase oil consumption.

Some general notes on the exhaust smoke on a gas engine....

1. Blue Hue smoke is oil burning
2. white smoke is typically coolant burning
3. Black smoke is generally too much fuel

the above is accurate 95% of the time. Turbo engines as known do indeed burn a bit of oil over time and pass oil into the the intake system. So there is some acceptable margin of that.

[liftrichh]

Originally Posted by bahn

Oil Smoke is generally blue in color, black is the fuel mixture being rich.

Hey I'm on mhd stage 2+, I'm bolt one with stock lpfp and my car is too rich, is that? I think that is the reason why my car is burning oil. I'm about 1000 miles out before I need to change my oil.

[The Silver Slammer]

Oil consumption is common on boosted cars, especially over-boosted cars with aftermarket tunes on them. If you're concerned about it get a catch can.

[Pladi]

Originally Posted by The Silver Slammer

Oil consumption is common on boosted cars, especially over-boosted cars with aftermarket tunes on them. If you're concerned about it get a catch can.

how is a catch can going to stop your oil consumption ???

[The Silver Slammer]

Originally Posted by Pladi

how is a catch can going to stop your oil consumption ???

It won't stop oil consumption per se, because a boosted/forced induction engine produces some blow-by naturally. But it can help reduce the amount of oil burned in the engine by stopping it before it enters the engine. The oil liquids are caught before they enter the intake and thereby less build up of junk (on pistons, valves, stem seals, etc.) in the engine from burning foreign fuels. (yes, oil is a fuel). It reduces the adverse effect of consuming oil.

[Pladi]

Originally Posted by The Silver Slammer

It won't stop oil consumption per se, because a boosted/forced induction engine produces some blow-by naturally. But it can help reduce the amount of oil burned in the engine by stopping it before it enters the engine. The oil liquids are caught before they enter the intake and thereby less build up of junk (on pistons, valves, stem seals, etc.) in the engine from burning foreign fuels. (yes, oil is a fuel). It reduces the adverse effect of consuming oil.

For N55 and a good working PCV catch can is useless.

N54 i can see a benefit.

We talk about catch cans like they are god sent..

[The Silver Slammer]

Originally Posted by Pladi

For N55 and a good working PCV catch can is useless.

N54 i can see a benefit.

We talk about catch cans like they are god sent..

On a stock car, ok, I see your point and agree, but most of us on here are modified, more boost, more timing, higher revs, harder driving, etc. Just saying if you don't want to consume as much oil don't mod your car, if you do, either keep a closer eye on oil levels or get a catch can and check it regularly.

Agree, but I don't have one, I just keep a closer eye on it.

Cheers

[liftrichh]

Originally Posted by The Silver Slammer

On a stock car, ok, I see your point and agree, but most of us on here are modified, more boost, more timing, higher revs, harder driving, etc. Just saying if you don't want to consume as much oil don't mod your car, if you do, either keep a closer eye on oil levels or get a catch can and check it regularly.

Agree, but I don't have one, I just keep a closer eye on it.

Cheers

Gotcha I just installed mines now time to see