BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      11-07-2017, 09:21 AM   #1
Matticus91
Brigadier General
Matticus91's Avatar
United_States
3470
Rep
3,722
Posts

Drives: 2013 135i
Join Date: Aug 2015
Location: Washington DC

iTrader: (6)

Post N55 Walnut Blast Before and After (with pics)

I've seen tons of before/after sets from N54's but very rarely do people do the same job on the N55's since it has been determined that they are less likely to build up carbon on the valves due to changes since the N54. Purpose of this post is just to help N55 owners find an example of carbon buildup vs an N54.

The attached images are from GoodMoodley who had his N55 walnut blasted at 45,000 miles while doing a turbo upgrade and some other work. It shows that there is some discoloration and slight carbon buildup, but nothing like what we'd see on an N54 with the same mileage. First two images are before the walnut blast, second two are after. He does not have a catch-can or any other intake mods that would impact these results.

This isn't going to reflect results from every N55, but it can help give people an idea of what to expect. I'm approaching 75k miles in my 135 now and will likely do a walnut blast at 80k just as a preventative measure, and since it can only really help anyway.
Attached Images
    
__________________
"Tobias" 2013 135i ///M-Sport 6MT • Pure Stage 1 • XDI 35 HPFP • 404whp/440wtq

Last edited by Matticus91; 11-07-2017 at 01:35 PM..
Appreciate 4
zx10guy5139.00
AustinE19.50
Gangplank1538.50
      11-07-2017, 11:27 AM   #2
zx10guy
Brigadier General
5139
Rep
3,235
Posts

Drives: 2013 135i
Join Date: Feb 2014
Location: DC

iTrader: (0)

Big props for posting these pictures. There's been constant discussion on whether the N55 motors really do need walnut blasting or not. But nothing definitive and all conjecture as no one has actually had it done and posted pictures. Now we have an example of this.

Do you know if he was running a catch can?
__________________
Quote:
Originally Posted by Lups View Post
We might not be in an agreement on Trump, but I'll be the first penis chaser here to say I'll rather take it up in the ass than to argue with you on this.
Appreciate 1
      11-07-2017, 11:57 AM   #3
Matticus91
Brigadier General
Matticus91's Avatar
United_States
3470
Rep
3,722
Posts

Drives: 2013 135i
Join Date: Aug 2015
Location: Washington DC

iTrader: (6)

Quote:
Originally Posted by zx10guy View Post
Big props for posting these pictures. There's been constant discussion on whether the N55 motors really do need walnut blasting or not. But nothing definitive and all conjecture as no one has actually had it done and posted pictures. Now we have an example of this.

Do you know if he was running a catch can?
He did not indicate if he was running a CC or not, but I'd guess no. That's a good question though and I'd like to see comparisons between the two setups
__________________
"Tobias" 2013 135i ///M-Sport 6MT • Pure Stage 1 • XDI 35 HPFP • 404whp/440wtq
Appreciate 0
      11-07-2017, 12:09 PM   #4
Esteban
Major General
Esteban's Avatar
United_States
42183
Rep
7,224
Posts

Drives: a slow car fast
Join Date: Jun 2014
Location: SoCal

iTrader: (0)

Quote:
Originally Posted by Matticus91 View Post
He did not indicate if he was running a CC or not, but I'd guess no. That's a good question though and I'd like to see comparisons between the two setups
Have heard that they are not that effective. Anybody know for sure?
__________________
Appreciate 0
      11-07-2017, 12:14 PM   #5
GoodMoodley
First Lieutenant
Canada
225
Rep
376
Posts

Drives: 12' 135i Pure Stg 2, 15' 228i
Join Date: Oct 2015
Location: Toronto

iTrader: (0)

Quote:
Originally Posted by zx10guy View Post
Big props for posting these pictures. There's been constant discussion on whether the N55 motors really do need walnut blasting or not. But nothing definitive and all conjecture as no one has actually had it done and posted pictures. Now we have an example of this.

Do you know if he was running a catch can?
No catch can my friends. BMS intake upstream and generic charge pipe. No meth, extra injectors etc...
__________________
Past: 1979 RX-7, 1980 Civic, 1989 B2200 lowrider, 1990 Golf GT, 1995 Civic Si Turbo, 2000 Civic SiR, 2000 328i, 2003 540i M-Sport, 2008 Rabbit, 2014 Pilot, 2002 A4 1.8T, 2009 A4 2.0T Quattro, 2017 CR-V Touring 2020 CR-V Touring

Current: 2012 135i, 2015 228i x-Drive, 2023 CR-V Touring Hybrid
Appreciate 2
Matticus913469.50
zx10guy5139.00
      11-07-2017, 01:33 PM   #6
Matticus91
Brigadier General
Matticus91's Avatar
United_States
3470
Rep
3,722
Posts

Drives: 2013 135i
Join Date: Aug 2015
Location: Washington DC

iTrader: (6)

Quote:
Originally Posted by Esteban View Post
Have heard that they are not that effective. Anybody know for sure?
I've heard a TON of conflicting opinions on this, yet i keep seeing them on pro-level cars. My thought on them is they can't hurt anything so why not run one to be safe?

EE did a great video on this:


Quote:
Originally Posted by GoodMoodley View Post
No catch can my friends. BMS intake upstream and generic charge pipe. No meth, extra injectors etc...
Thanks for the info! That's great to hear that this is without a catch-can, I'd still like to see a car with one to compare but it's nice to see the valves were pretty clean on a stock setup.
__________________
"Tobias" 2013 135i ///M-Sport 6MT • Pure Stage 1 • XDI 35 HPFP • 404whp/440wtq
Appreciate 1
Esteban42182.50
      11-07-2017, 02:02 PM   #7
Esteban
Major General
Esteban's Avatar
United_States
42183
Rep
7,224
Posts

Drives: a slow car fast
Join Date: Jun 2014
Location: SoCal

iTrader: (0)

Quote:
Originally Posted by Matticus91 View Post
Quote:
Originally Posted by Esteban View Post
Have heard that they are not that effective. Anybody know for sure?
I've heard a TON of conflicting opinions on this, yet i keep seeing them on pro-level cars. My thought on them is they can't hurt anything so why not run one to be safe?

EE did a great video on this:
Interesting video. Thanks for posting. Wonder if the oil catch cans that have been installed on the 1er are of the "cheap" variety that's described in the video, without the filters or baffling systems, and maybe that's why some people have reported that they are not that effective on our cars? As you said tho, I guess it couldn't hurt.
__________________
Appreciate 0
      11-07-2017, 03:03 PM   #8
atr_hugo
No longer moderate
atr_hugo's Avatar
No_Country
325
Rep
4,401
Posts

Drives: '13 135i
Join Date: Jun 2007
Location: -

iTrader: (0)

Here's the blurb from BMW's introductory doc for the N55:

Crankcase Ventilation

The blow-by gasses flow into the settling chamber of the cylinder head cover through an opening located in the rear of the cover. Here, the blow-by gasses are directed through holes on to an impact plate, against which the oil impacts at high speed, and drains off. The blow-by gasses, cleaned of oil, flow via the pressure control valve (depending on the operating mode) through the non return valves into the inlet pipe upstream of the turbocharger, or via passages in the cylinder head ahead of the intake valves. The separated oil is drained via a return flow duct into the oil pan.

Naturally Aspirated Mode

The standard function can only be used as long as a vacuum prevails in the intake air manifold, i.e. in naturally-aspirated engine mode. With the engine operating in naturally-aspirated mode, the vacuum in the intake air manifold opens the non-return valve (15) in the blow-by duct within the cylinder head cover. This draws off blow-by gasses via the pressure control valve. At the same time, the vacuum also closes the second non-return valve (12) in the duct to the charge air intake pipe. The blow-by gasses flow via a distribution rail integrated in the cylinder head cover, through the intake passages (16) in the cylinder head, which lead directly into the intake ports, ahead of the valves.
Appreciate 0
Post Reply

Bookmarks

Tags
blast, carbon, n55, valves, walnut

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 07:28 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST