|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
My CBU cleaning experience
|
|
08-21-2017, 04:24 PM | #111 |
Major
808
Rep 1,192
Posts |
Thanks rbreding for the pictures. Isn't it really rewarding seeing these squeaky clean valves?
As I wrote before - I don't think the catch can is needed to prevent CBU. I checked mine after 30k miles and the intakes still looked as clean as after the cleaning. The EGR block is all that is needed to prevent CBU. |
Appreciate
0
|
08-21-2017, 09:38 PM | #112 | |
Second Lieutenant
56
Rep 238
Posts |
Quote:
As an aside, when I replaced my IC with one of the new ATM ones the old one had at least 1/2 - 3/4 cup of oil in it from the CCV. For me I want to keep the excess oil out that would condensate even more so in the new IC. I want that IC do stay just as clean as the intake. If you haven't pulled your IC to see how much is in there I would suggest that process next maintenance interval. Its not too difficult but it does involve pulling the fan. |
|
Appreciate
0
|
08-22-2017, 10:03 AM | #113 | |
Major
323
Rep 1,157
Posts |
Quote:
|
|
Appreciate
0
|
08-22-2017, 10:51 PM | #114 |
Second Lieutenant
56
Rep 238
Posts |
Not sure if you are still running the factory IC Andrew ? That massive ATM IC was a little more difficult for me maneuver with the fan on thus the fan removal point.
|
Appreciate
0
|
08-23-2017, 09:16 AM | #115 |
Major
323
Rep 1,157
Posts |
Oh yeah, aftermarket is definitely harder to do, and needs removal of the fan. Factory IC is easy.
|
Appreciate
0
|
08-26-2017, 08:21 AM | #116 | |
Major
808
Rep 1,192
Posts |
Quote:
|
|
Appreciate
0
|
09-23-2017, 01:30 PM | #117 |
Registered
2
Rep 20
Posts |
I am reaching out for advice on walnut blasting. I took the intake manifold off to replace glow plugs and glow plug controller and am considering CBU cleaning. Two questions:
a. how/what starter wires are used to jump and move valves between cylinder cleaning? b. Are the swirl port AND tangential swirl port valve positions synchronized? Meaning if I scope the tangential swirl port to determine the valve position will that also be the valve position for the same cylinder swirl port? Thanks |
Appreciate
0
|
09-23-2017, 01:46 PM | #118 | |
New Member
4
Rep 15
Posts |
Quote:
http://www.e90post.com/forums/showth...hlight=starter b. yes, both ports on the same cylinder are in sync. |
|
Appreciate
0
|
09-23-2017, 04:59 PM | #119 |
Registered
2
Rep 20
Posts |
Thank you for the prompt reply. That is good regarding the ports as I am having an easier time borescoping the tangential ports.
The video was very good but the starter switch on my 335d M57 engine does not appear to match what was shown in the video - at least from what I could see. Where is the connection that is to be disconnected? Any clarification would be very much appreciated. |
Appreciate
0
|
09-23-2017, 07:49 PM | #120 | |
New Member
4
Rep 15
Posts |
Quote:
lastly, connect the long plastic cable that goes across the engine to the positive battery terminal on the pass side strut mount. another way is to turn it by hand and it is not that hard either. I used the starter switch as I did it. |
|
Appreciate
0
|
09-23-2017, 10:43 PM | #121 | |
New Member
4
Rep 15
Posts |
Quote:
|
|
Appreciate
0
|
02-22-2018, 02:18 PM | #122 |
Enlisted Member
10
Rep 44
Posts
Drives: 2011 BMW 335D
Join Date: Jan 2018
Location: Bradenton, FL
|
Do you have to do anything with the swirl port while you're cleaning the tangential port? Will the walnut media and air pressure go in one port and out the other? Or are they separate from each other and you just blast tangential port with its adapter and then blast the swirl port with its adapter afterwards?
|
Appreciate
0
|
02-22-2018, 02:47 PM | #123 | |
Second Lieutenant
107
Rep 202
Posts |
Quote:
Check out the inlet port configuration illustration on page 21 of this BMW service training manual to better visualize what's going on inside the cylinder head. http://www.kaross-chip.lv/m_download...ommon-Rail.pdf |
|
Appreciate
1
HudZ9.50 |
02-22-2018, 04:14 PM | #124 | |
Enlisted Member
10
Rep 44
Posts
Drives: 2011 BMW 335D
Join Date: Jan 2018
Location: Bradenton, FL
|
Quote:
|
|
Appreciate
0
|
02-22-2018, 08:16 PM | #125 | |
New Member
4
Rep 15
Posts |
Quote:
one thing about the top ports (i think they are the tangential) is that you have to be very careful not to clean too close to the top. as they are plastic, they say there is a danger of blasting through the plastic. if you read the pdf document about the cleaning, the document says to mark the wand about 1 inch and not go over that line as you do the blasting. also, the cylinder closest to the firewall is kind of hard to reach, so be even more careful with this. I lost my balance and almost messed it up. needless to say, this is the most critical thing along with making sure the ports are actually closed. and one last thing, when everything is finished and you put back the thing together, the engine will barely turn over. it takes some cranking before it kinda gets normal and you hear the first "spark". I did not know this and almost got the car towed to the dealership. |
|
Appreciate
1
HudZ9.50 |
05-11-2018, 05:57 PM | #126 |
New Member
6
Rep 11
Posts |
Hi, I'm starting my CBU blasting for first time. I've read as much as I could so far. I want to make sure the valve are closed before I blast but don't want to open the valve cover. I have a scope camera and can see the valve in the tangential port. I looked at all six tangential ports. Some valve seem to be at a higher position then other but not sure which is closed. My question is:
How do I know when they are closed? Are they closed on the very top of an up stroke or the very bottom of a down stroke? Thanks for any advice. |
Appreciate
0
|
05-14-2018, 08:26 AM | #127 | |
Second Lieutenant
107
Rep 202
Posts |
Quote:
But in the spirit of fostering can-do attitudes and knowing that we all have to start somewhere: yes, some valves belonging to different cylinders seem to be at different positions than others because they in fact are at different stages of opened/closed. You will need to inspect the intake valves of each cylinder individually before cleaning each one and turn the crank (either by starter or by hand) to ensure that the intake valves have risen to their highest point and stopped their motion and are thus closed. Once you've cleaned that cylinder's intake ports, you will then move on to another cylinder, inspect the intake valves and rotate the crank if necessary to close those valves before cleaning. To help you visualize how the valve travels in relation to the intake port from which you are viewing it, here's a cutaway of a cylinder head (it's for a different motor, but the principle is the same): |
|
Appreciate
0
|
05-14-2018, 12:31 PM | #128 | |
Private First Class
91
Rep 183
Posts |
Quote:
|
|
Appreciate
0
|
05-24-2018, 07:53 PM | #130 |
New Member
0
Rep 13
Posts
Drives: 2011 BMW 335d, 2011 BMW M3 ZCP
Join Date: May 2018
Location: Fitzgerald, GA
|
I got a quote from my dealer for CBU cleaning for $3000 which is insane on a car worth $12000. Does anyone know an independent shop in the South Georgia-North Florida area? Any assistance will be greatly appreciated.
|
Appreciate
0
|
06-13-2018, 07:22 PM | #131 |
Registered
0
Rep 4
Posts |
EGR Block + H2O Meth... Smog Cert?
Gents, I really appreciate all the advice, photos, tips, and expertise.
May I ask how this work affects smog certification? Some context: I have a 2010 335d. I started getting the SES lights a year a go. Dealer in San Jose (CA) wanted $2750 to sublet the CBU work. I have found a couple of local places willing to do the walnut blasting for roughly $1300. 1) Do I need to do the cleaning (soda or walnut) first, before trying to install the water+meth injection system to get rid of the CBU? (some posts in other threads indicate possibly not? (gtp9000?)) 2) How does one get the smog certification done with the EGR block and/or the water+meth injection? Thanks very much for all the helpful knowledge sharing! |
Appreciate
0
|
06-13-2018, 10:48 PM | #132 |
Second Lieutenant
56
Rep 238
Posts |
Indy pricing in Kalifornia has show to be around $1000 for a good job. There are shops charging less but work has been suspect or confused for a gasser.
After you have it cleaned why not have a simple stage 1 tune to turn off the EGR and keep all your emissions equipment intact. This will eliminate the major culprit of CBU. Since the EGR is still there and all readiness will show you should pass SMOG without an issue even at a legit SMOG shop. I would consider meth on a stock vehicle a waste of money really. Just do the above. |
Appreciate
0
|
Bookmarks |
|
|