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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #26  
Old 02-15-2013, 05:37 PM
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Bemo Bemo is online now
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What a mess...glad you got it cleaned before it got out of hand.
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  #27  
Old 02-15-2013, 06:12 PM
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galahad05 galahad05 is offline
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I'll be getting it done soon. As an extra while my car's in the shop getting a new subframe/suspension pieces/wheel/tire.
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  #28  
Old 02-15-2013, 06:34 PM
SuperTerp SuperTerp is offline
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Originally Posted by galahad05 View Post
I'll be getting it done soon. As an extra while my car's in the shop getting a new subframe/suspension pieces/wheel/tire.
Its a must make the techs take pics too.. Just so you get an idea of when you might need it again.
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  #29  
Old 02-15-2013, 07:10 PM
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thekurgan thekurgan is offline
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Originally Posted by CALWATERBOY View Post
Consensus seems to be: Plan on it at or about 60k mi.

But, is the problem PCV blowby alone? In that case, DANGER! ILLEGAL! disconnecting the PCV system from the intake should solve the issue.

That's done by virtually nobody on public roads. Also, I'm astonished that nobody's come up with a way to allow PCV and fully filter/wash air coming through.

You automotive lubricant chemists - what's so hard?

Come to think of it, I know where we might get a well qualified answer - I'll post next week if it develops.

Are there catch cans for the N54/N55?
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  #30  
Old 02-15-2013, 08:14 PM
Hierlevelz Hierlevelz is offline
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Are there catch cans for the N54/N55?
BMS makes one.
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  #31  
Old 02-15-2013, 08:15 PM
Firewire Firewire is offline
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Yep!

http://www.burgertuning.com/BMW_335_oil_catch_can.html

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  #32  
Old 02-16-2013, 03:52 AM
hondo402000 hondo402000 is offline
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you would think that by now BMW would come up with an oil mist separator, on the PCV system, kind of like an oil filter that would catch most if not all of the oil mist that gets into the intake, and change the filter at say every 15K miles.

Hondo
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  #33  
Old 02-16-2013, 04:58 AM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by SuperTerp View Post
No problem! Yeah same... 6 bottles of techron at 3k intervals didn't do squat.
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Au contraire, Monsieur! Did exactly what it is designed to do. But....cannot work where it does not go, the intake sys. Unless you put it there, which wouldn't be effective as we're talkin' a few minutes every 3000 mi.

For those who don't know, shell blasting's a relatively easy DIY highly recommended for its recuperative and restorative powers.

.

Last edited by CALWATERBOY; 02-16-2013 at 07:28 AM.
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  #34  
Old 02-16-2013, 07:26 AM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by thekurgan View Post
Are there catch cans for the N54/N55?

A few....

Some report intake valve fouling in spite of.
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  #35  
Old 02-16-2013, 07:30 AM
SuperTerp SuperTerp is offline
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Originally Posted by CALWATERBOY View Post
A few....

Some report intake valve fouling in spite of.
Thats what I heard.
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  #36  
Old 02-16-2013, 07:41 AM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by SuperTerp View Post
Thats what I heard.

Suspect uncondensed organics carbonized on the valves.

S*itsky! I'm a busy guy not inclined to run tests involving significant down time. Anyone willing to fraction PVC gas t'see what's up?

Why, hello there Kat. Nuts & bolts o'chromatography workin' in yer lab?

Maybe my source can shine a light on it....they should be able too....ooooooooo I'm feelin' limber!
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  #37  
Old 02-16-2013, 09:44 AM
beeky beeky is offline
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Is it possible to dissolve the gunk by pouring some sort of solvent into the intake manifold while the engine is running? I recall doing this about 30 years ago with Bardahl while helping my friend get a '53 Chevy running after an intake valve stuck open because of carbon deposits. To the best of my recollection a '53 chevy straight six is substantially different than a BMW six (other than the six part) but the gunk should be soluble regardless of the type of engine. The problem is how to get the solvent to come in contact with the gunk.
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  #38  
Old 02-16-2013, 10:18 AM
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Is it possible to dissolve the gunk by pouring some sort of solvent into the intake manifold while the engine is running? I recall doing this about 30 years ago with Bardahl while helping my friend get a '53 Chevy running after an intake valve stuck open because of carbon deposits. To the best of my recollection a '53 chevy straight six is substantially different than a BMW six (other than the six part) but the gunk should be soluble regardless of the type of engine. The problem is how to get the solvent to come in contact with the gunk.
Nope
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  #39  
Old 02-16-2013, 11:28 AM
SuperTerp SuperTerp is offline
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So I know I'm kinda a big deal but today I completed one of the hardest tasks in automotive engineering.




BOOM! FIRST JOB UNDER THE HOOD! Popped those clip thingys (kinder hurt my thumb a little )

Let me know if anyone wants to back me in opening an indy shop
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  #40  
Old 02-16-2013, 12:06 PM
hondo402000 hondo402000 is offline
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my questions on this whole matter
at what temperture does the oil carbonize,,,,
if the water thermostat is ,oooo say 190 degrees F how much hotter is the head running.
cant imagine the head is ooo say running 400 F since its water cooled.
I could see how the intake valves would be hotter since they are in the combustion chamber

Hondo
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  #41  
Old 02-16-2013, 02:06 PM
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galahad05 galahad05 is offline
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Quote:
Originally Posted by hondo402000 View Post
my questions on this whole matter
at what temperture does the oil carbonize,,,,
if the water thermostat is ,oooo say 190 degrees F how much hotter is the head running.
cant imagine the head is ooo say running 400 F since its water cooled.
I could see how the intake valves would be hotter since they are in the combustion chamber

Hondo
One of the oil experts around here can speak to this, but my understanding is that the spec you're looking for is an oil's "flashpoint".
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  #42  
Old 02-16-2013, 03:08 PM
racooper3 racooper3 is offline
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Anybody know if this problem occurs with the 545 w/N62, non turbo engines? I was wondering if BG44K or periodic Techron will keep everything clean.

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  #43  
Old 02-16-2013, 03:11 PM
racooper3 racooper3 is offline
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Originally Posted by bmwoem1 View Post
The sad thing is, those intake valves aren't even that bad... I've seen way worse (I'm a BMW master tech). The N63 engines are just as bad, I'm even starting to see the same issue on the N55's... We've had this problem on all direct injection engines starting with the N73. The buildup is noticeable as early as 20k miles
How about the N62, specifically the '05 545

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  #44  
Old 02-16-2013, 05:21 PM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by racooper3 View Post
Anybody know if this problem occurs with the 545 w/N62, non turbo engines? I was wondering if BG44K or periodic Techron will keep everything clean.

Sent from my DROID RAZR HD using Bimmer App

Nope. Occurs in any directly injected engine.

Last edited by CALWATERBOY; 02-16-2013 at 05:23 PM.
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  #45  
Old 02-16-2013, 05:51 PM
daytrader daytrader is offline
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So I'm going in for my 30K in a couple of weeks, should I ask for a scope? Or is 50k more appropriate?
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  #46  
Old 02-16-2013, 05:52 PM
SuperTerp SuperTerp is offline
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So I'm going in for my 30K in a couple of weeks, should I ask for a scope? Or is 50k more appropriate?
I'd do it and make them show you or give you pics! I bet @ 30 they look like my front 3 which still made me sad
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  #47  
Old 02-16-2013, 05:58 PM
kmorgan_260 kmorgan_260 is offline
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Originally Posted by thekurgan View Post
So, yes, it's clean. How does it drive now? Looking at these posts reminds me I'm glad the N54 is gone. Reminds me of the RS4 nightmares with carbon build up.
My understanding is that all DI engines are prone to this.
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  #48  
Old 02-16-2013, 06:03 PM
daytrader daytrader is offline
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Originally Posted by SuperTerp View Post
So I know I'm kinda a big deal but today I completed one of the hardest tasks in automotive engineering.




BOOM! FIRST JOB UNDER THE HOOD! Popped those clip thingys (kinder hurt my thumb a little )

Let me know if anyone wants to back me in opening an indy shop
SuperTerp, what's the benefit of the drop in BMS filter over OEM?
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  #49  
Old 02-16-2013, 06:21 PM
SuperTerp SuperTerp is offline
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SuperTerp, what's the benefit of the drop in BMS filter over OEM?
It does look a lot different and feels like higher quality, I was reading some other boards around the net and saw it made a little difference over OEM so I just pulled the trigger till I feel like doing DCI's... I'm going back and forth on just dropping a few k and doing everything at once FMIC, OC, Suspension, Exhaust, and diffuser, but then comes what if something CPO needs to be done. I doubt I'll get any help since none of it would be Dinan .
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  #50  
Old 02-16-2013, 06:23 PM
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MP3_E46 MP3_E46 is offline
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Originally Posted by kmorgan_260 View Post
My understanding is that all DI engines are prone to this.
I spent a while Googling this once. Some are far worse than others. During the same Google session a learned my Prius is *not* DI - guess that explains why many owners break 300K with virtually nothing other than regular maintenance (~50% needed to overhaul/replace the battery pack). Likely Toyota decided DI was not worth the expense/ reliability issues.

Since 2006 Lexus has had DI in the GS350 and IS350 but they combine port injection with direct injection. Googling shows no one complaining of build up on their intake valves. The E93 could well be our last BMW.. next is likely a Lexus. Saying that we've not had a single issue with our BMW in six weeks and almost 1000 miles
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