07-02-2014, 09:49 AM | #1 |
Lieutenant
164
Rep 573
Posts
Drives: 2013 F30 335i 8SA M-Adaptive
Join Date: Oct 2012
Location: Dallas, Tx (Frisco)
|
Cleaning your intake valve's carbon buildup
For the N54, but basically the same for ours
Crazy amount of buildup at ~35k miles |
07-05-2014, 11:50 AM | #2 |
New Member
3
Rep 13
Posts |
Very informative. I had heard of similar issues with audi direct injection cars. Does anyone know if the diesel bmw's have the same issues since they are direct injection too?
|
Appreciate
0
|
07-05-2014, 01:31 PM | #3 | |
Curmudgeon and Pedant
690
Rep 3,488
Posts |
Quote:
It's hard to say how many diesel owners are having problems, as BMW doesn't say and these forums are not representative at all. Also, many people aren't having problems (like me) apparently due to driving regimes. The X5d's don't seem to be having as many problems, possibly due to higher engine loads (heavier, bigger car) and the presence of the low-pressure EGR in addition to high pressure. Last edited by floydarogers; 07-05-2014 at 01:36 PM.. |
|
Appreciate
0
|
07-08-2014, 02:25 PM | #4 | |
Lieutenant
164
Rep 573
Posts
Drives: 2013 F30 335i 8SA M-Adaptive
Join Date: Oct 2012
Location: Dallas, Tx (Frisco)
|
Quote:
Toyota uses a hybrid DI/port injection system where fuel is delivered by both mechanisms - the fuel injected into the intake port cleans the valves and prevents this problem. Interesting enough - that system was not designed to fix this issue but rather to address the fuel delivery problems at high RPM operation they had with older injectors. The clean valves were a welcome unintended side-effect. |
|
Appreciate
0
|
08-05-2014, 09:31 PM | #5 |
Save the Manuals
1739
Rep 2,959
Posts |
I hope BMW goes the dual fuel-into-cylinder delivery route (DI and PI) in the B58 series.
Wishful thinking
__________________
2023 G80 6MT, CCBs
2002 330i Dinan, 5MT 2000 Z3 Conforti, 5MT |
Appreciate
0
|
08-07-2014, 10:23 AM | #7 |
Save the Manuals
1739
Rep 2,959
Posts |
Yeah
Can you imagine how bad it would be to not exactly get those valves tightly closed off, and getting a few walnut shell fragments stuck in a cylinder or cylinders. This job is NOT for the faint of heart. The whole carbon buildup thing is cause for pause in considering purchase of any DI car
__________________
2023 G80 6MT, CCBs
2002 330i Dinan, 5MT 2000 Z3 Conforti, 5MT |
Appreciate
0
|
08-14-2014, 08:15 AM | #9 | |
Now in the dark side !
68
Rep 1,134
Posts |
Quote:
When I used to be a mechanic, we had a lot, and I mean a lot of presentation of supposed miracle in a can. After customers bought and used the product, the car always came back the same way a car without this put in the system ended up. Not so much a believer of "mechanic in a can", sorry.
__________________
Present: 2011 Porsche Carrera S Cab, white (Now on the dark side!)
BMW X3 M40i (wifey) Past:2012 335i Sport Black, 20" 356 wheels, M Sport Aero, MPE (Sold -kinda missed) 2010 X5 35d Black fully loaded (Sold) 2007 335i sedan Antracite (Sold and missed !) |
|
Appreciate
0
|
08-14-2014, 09:41 AM | #10 |
Lieutenant Colonel
544
Rep 1,623
Posts |
Neither CHEVRON COMPLETE FUEL SYSTEM CLEANER, Techron or BMW's Cleaner (which in Techron) have any impact on the carbon issue since they are added to the fuel system which is then injection directly into the DI chambers, not touching or "washing" the valves and seats. I had a 08 335i and now a 13 335i and use Techron regularly to keep the injectors clean, I had the 08 cleaned at 40K miles and was surprised at the amount of carbon was built up in the valve area. Really mess.
|
Appreciate
0
|
08-14-2014, 02:59 PM | #11 | |
Lieutenant
164
Rep 573
Posts
Drives: 2013 F30 335i 8SA M-Adaptive
Join Date: Oct 2012
Location: Dallas, Tx (Frisco)
|
Quote:
|
|
Appreciate
0
|
08-14-2014, 03:04 PM | #12 | |
Lieutenant
164
Rep 573
Posts
Drives: 2013 F30 335i 8SA M-Adaptive
Join Date: Oct 2012
Location: Dallas, Tx (Frisco)
|
Quote:
You might end up with some media residue around the valve seats that the vacuum doesn't take care of, but that's why you use walnut and not soda or glass or aluminum oxide or silicon carbide etc. If the engine eats a little walnut dust it's not going to hurt it. |
|
Appreciate
0
|
08-28-2014, 01:17 PM | #13 |
Private
9
Rep 91
Posts |
|
Appreciate
0
|
08-28-2014, 04:02 PM | #14 |
Lieutenant Colonel
544
Rep 1,623
Posts |
the pictures of the Intake Valve that show the buildup on the valve stem and back of the valve face being cleaned by the concentrate does not apply to our DI engines. The cleaner never touches these areas. The valve face will be cleaned which is better than nothing
|
Appreciate
0
|
10-05-2014, 09:22 AM | #16 | |
First Lieutenant
38
Rep 374
Posts |
Quote:
There are a couple other things that could mitigate intake deposits - I think the current f30 n55 does a better job of controlling oil temps and keeping oil temps down, particularly when you start to "exercise" the engine. BMW will be switching to Shell as its lubricant partner starting in 2015. One reason for the switch may be (and I'm guessing) is that Shell is way, way ahead of other oil companies in refining "gas-to-liquid" lubricants. These GTL lubes made from natural gas are very clean and have low deposition rates, and more to the point, have very low volatility (less oily vapors) compared to more conventional synthetics. Finally, there was a thread on the BITOG oil forum about intake deposits and Doug Hillary (a very experienced lubricants engineer who has worked for Castrol and Exxon/Mobil) made this observation: "As for OCIs - I recommend following the Warranty requirements to the letter! When in Germany this year I was given some data from very reliable sources that suggests that shortening the OCIs and/or using non-Approved lubricants may affect intake deposits in a negative way." What he is saying is that the most deposition from an oil occurs when it is new or fresh. So, more frequent oil changes just feed or replenish deposits and accelerate intake deposits. Just one more reason to avoid unnecessary frequent oil changes. Stick to BMW's recommended oil change interval. Here's the thread http://www.bobistheoilguy.com/forums...72#Post2082572
__________________
'14 328d, '13 M3 ZCP, '12 535i, '11 335d, '09 Z4 DINAN Stage II, '05 330i ZHP, '05 M3 ZCP, '02 M3, '91 328i, '90 535i, '88 528e, '88 M5, '87 M6, '95 Z3, 95 M3, '93 M5, '87 325e, '89 535i, '86 635i, '73 Bavaria. Last edited by m6pwr; 10-05-2014 at 05:18 PM.. |
|
Appreciate
2
Linc090930.00 |
10-05-2014, 07:05 PM | #17 |
Captain
268
Rep 807
Posts |
This is why I lease. All DI engines have this issue. The only way to solve it, is to use a secondary fuel injector in the intake to run a maintenance cycle. But like fuel injection 30 some years ago, it will have it's issue and get resolved.
Side not, to help with carbon build up. You need to ream your car once in a while to get the heat up and push the engine at high revs. BMW need to be driven hard, everyone with issue is usually pussy footed around town. |
Appreciate
0
|
10-07-2014, 01:01 PM | #18 | |
First Lieutenant
24
Rep 309
Posts |
Wow, very interesting find!
Quote:
|
|
Appreciate
0
|
12-19-2014, 12:00 AM | #19 |
Captain
556
Rep 823
Posts
Drives: bmw M3 F80
Join Date: Dec 2013
Location: france
|
hello
I have a BMW F30 330d 2012 model 258ch totaling 116000kms As with all my bmw I removed the intake manifold and agr valve to see if it was dirty and surprise this is the first time I see such a fouling on 1.5cms intake manifold calamine So dismantling and cleaning karcher Piece that connects the intake manifold and the arrival of the exhaust gas before after Entered the intake manifold Intake manifold and disassemble plastic flap To remedy to this problem I decided to buy oil recuperateur Setting up the oil separator Finally I have more oil in the air supply system here is the kit bought on Ebay Exhibit 19 has a flush cut on part 2 Attaching the quick coupling Ø12 (not supplied in the kit) to the cylinder head cover part Attaching the quick coupling Ø12 on the part of air hose Attaching the front of the radiator tank and installation quick coupling Ø12 in place of the original ones Air inlet section view View part cylinder head cover View of the reservoir and oil level |
Appreciate
1
Solidjake957.50 |
12-19-2014, 11:19 AM | #21 | |
Captain
556
Rep 823
Posts
Drives: bmw M3 F80
Join Date: Dec 2013
Location: france
|
Quote:
I already cleaned karcher the intake manifold which is now like new and I removed a section on the valve conduits scraping and sucking but as I do not have the camera as the video there is some dirt to valves |
|
Appreciate
0
|
01-04-2015, 09:07 AM | #22 |
Brigadier General
595
Rep 3,870
Posts |
For those in the US, do you think my dealership would do this task if I ask them before my car turns to 50k
__________________
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|