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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Mod maintenance: Charge Pipe and sensor cleaning



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      08-23-2012, 01:53 PM   #1
FrankiE90
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Mod maintenance: Charge Pipe and sensor cleaning

I've recently notice my N55 has been performing
quiet sluggishly. Daily driving has been less than
thrilling, the bimmer feels slow when flooring it.
During a couple of track events, on the straight aways
the car doesn't feel like it did before. Boosting
has not been optimal.

The bimmer's at bout 50k i'm FBO
with Procede Rev2.5 map 1108 no meth.

Here's what I found when checking up on
my mods - An oily mess on the charge pipe arm
going to the t-body!!! The oil residue was on the
charge pipe, the DME wires, the DME board, on the
t-body -- Immediately, problem found.

oily residue - all around the
charge pipe
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started to clean the outside
but u can see the inside is oily - the sensor needs
cleaning
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I removed the charge pipe, wiped down
everything, removed the sensor shot it with
some crc cleaner. Clear'd the tune did
a run and was very happy. The N55 boost'd
properly on Map 1 and 2. Huge difference

The CP design using the C-Clip is prone
to leakage as you can see. I would recommend
to you guys out there to do some regular maintenance
and clean ur CP, CP sensor, MAF sensor as well.

I'm not knocking ER's CP, just sharing with you
how it's been holding up.
In the later day i'm going try to add a thin
silicone hose between the CP and t-body.
To help prevent any extreme oily messes.

Any of you have similar experience post up.


And on a side note - to continue on maintenance.
on the list to clean is the intake manifold / walnut shell
blasting. Will post pictures soon.
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      08-23-2012, 03:24 PM   #2
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Any idea where the oily residue came from?
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      08-23-2012, 03:29 PM   #3
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Thanks for the heads up! I will check mine.

The CP design that use the C-Clip might be prone to leakage, but at least you actually SEE the mess, I have the Vishnu CP, its certainly 100% sealed but the sensor might be covered with oil... I'll have a look.

Very interested in the intake manifold pics after 50k miles, the n55 is supposed to be a bit better on that subject (supposed better crankcase ventilation system).
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      08-23-2012, 04:04 PM   #4
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Not suprised I've seen this happen before using these types of aftermarket CP.
Utilizing the factory Tb connection.

I've seen a n54 member put a silicone coupler and a T-bolt clamp over the part of the CP that connects to the TB. To stop the leakage
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      08-23-2012, 04:10 PM   #5
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Wouldn't this happen with a stock CP as well?
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      08-23-2012, 04:21 PM   #6
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Quote:
Originally Posted by hetzle
Wouldn't this happen with a stock CP as well?
Yes
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      08-23-2012, 06:31 PM   #7
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Quote:
Originally Posted by hetzle View Post
Any idea where the oily residue came from?
Hey hetzle -
i've seen oil build up from the front mount intercooler as well
both n54 and n55, it's common. the build up is most likely from the
turbo - maybe someone can chime in with details.

btw, sorry to hear bout ur botch'd tune install.
read ur post.

Quote:
Originally Posted by Kalud View Post
Thanks for the heads up! I will check mine.

The CP design that use the C-Clip might be prone to leakage, but at least you actually SEE the mess, I have the Vishnu CP, its certainly 100% sealed but the sensor might be covered with oil... I'll have a look.

Very interested in the intake manifold pics after 50k miles, the n55 is supposed to be a bit better on that subject (supposed better crankcase ventilation system).

Diff check - it made a big difference..
the Vishnu CP, with it's silicone hose to the T-body (design)
is a guaranteed seal - only way air will seap through
is if it pops off or u got a leak somewhere else.

I've been wanting to check out the valves - soon enough
i'll post up some pics -

also the n55 valve train - i may have some news and
issues. do you know of any know problems on the boards
from a member?
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      08-24-2012, 08:03 AM   #8
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It is called blow by and a catch can added to the system would take care of this.
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      08-24-2012, 08:59 AM   #9
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Quote:
Originally Posted by FrankiE90 View Post
also the n55 valve train - i may have some news and issues. do you know of any know problems on the boards
from a member?
No, none yet, but I am very interested in knowing more. What kind of issues ?
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      08-24-2012, 09:28 AM   #10
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Quote:
Originally Posted by Biohazard29 View Post
It is called blow by and a catch can added to the system would take care of this.
right, happens in all turbo cars. You can buy a catch can to catch most of this oil before it enters the intercooler. If your TB looks like that, can you imagine what your IC looks like?

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      08-26-2012, 03:01 AM   #11
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Quote:
Originally Posted by Kalud View Post
No, none yet, but I am very interested in knowing more. What kind of issues ?

loss in power, during acceleration -
check out this
http://realoem.com/bmw/showparts.do?...59&hg=11&fg=25
look at number 4 and 5.
image if that were to crack.

look at the price per.
i'll post up a new thread with picts and
we can discuss the internals.
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      08-26-2012, 12:09 PM   #12
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Quote:
Originally Posted by Biohazard29
It is called blow by and a catch can added to the system would take care of this.
I've had a BMS catch can for the last 3 months. When do you recommend checking / changing it?
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      08-26-2012, 01:56 PM   #13
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My charge pipe does not do this.. If oil is getting through you are also leaking boost! Check the o ring
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      08-26-2012, 02:05 PM   #14
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just cleaned all oil out of the chargepipe and cleaned the tmap and it feel a bit better for sure...
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      08-27-2012, 07:19 AM   #15
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Quote:
Originally Posted by Dark_Knight_335 View Post
I've had a BMS catch can for the last 3 months. When do you recommend checking / changing it?
I would check it atleast 1 a month and empty it out. Depends on driving styles, if you track it at all, they you will need to check it at the end of each day after you run your sessions.
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      08-27-2012, 08:02 AM   #16
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Quote:
Originally Posted by Biohazard29 View Post
I would check it atleast 1 a month and empty it out. Depends on driving styles, if you track it at all, they you will need to check it at the end of each day after you run your sessions.
wow... really that often? I just drive it somewhat spirited some weeknights and weekends really (I mass commute to NYC).
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