Article on Direct Injection
Thread Starter
Super Member
Joined: Apr 2007
Posts: 561
Likes: 2
From: New Mexico
2014 E350, 2012 SL550
Article on Direct Injection
Good article in layman's terms about DI and its potential problems.
http://www.thetruthaboutcars.com/201...l/#more-442513
Regards,
Don
http://www.thetruthaboutcars.com/201...l/#more-442513
Regards,
Don
MBWorld Fanatic!
Joined: Mar 2003
Posts: 2,974
Likes: 5
From: Southern California
2017 W205 C43 AMG
Good idea. What kind of fuel injector cleaner do you use? Or do you have the dealership do it? I've heard good things about Chevron Synthetic FI Cleaner as well as Redline.
MBWorld Fanatic!
Joined: Dec 2011
Posts: 4,391
Likes: 957
W212 FL
Then I have the dealersip do it and they do use a special machine , rev up the engine at high revs for minimum 15 minutes I suppose .
The mechanics whom I talked to in the private shops recommend Carbon Clean for diesel engines .
Out Of Control!!
Joined: Jun 2008
Posts: 10,557
Likes: 24
From: Earth
Porsche Macan S SportDesign / Ex M-B's: 11 & 10 & 06 E350's, 02 S500
Still not convinced about the long term prospects of D/I, and not convinced that it's a rather simple way for Automakers to squeeze out some extra HP and MPG to sell their cars. I've seen some disturbing photo's of carbon build up on newer cars, and I've heard that the motors may even lose HP in due time, especially if they aren't maintained and cleaned to a "T". Aside from that, they sound terrible at idle from outside, with that Diesel-like tapping sound.
.... Of course, they perform efficiently and better than non D/I motors (comparatively) from the get-go, and we don't know their true long term lasting values yet, for better or worse.
.... Of course, they perform efficiently and better than non D/I motors (comparatively) from the get-go, and we don't know their true long term lasting values yet, for better or worse.
Senior Member
Joined: May 2008
Posts: 325
Likes: 18
From: Canada
W213, C238
Still not convinced about the long term prospects of D/I, and not convinced that it's a rather simple way for Automakers to squeeze out some extra HP and MPG to sell their cars. I've seen some disturbing photo's of carbon build up on newer cars, and I've heard that the motors may even lose HP in due time, especially if they aren't maintained and cleaned to a "T". Aside from that, they sound terrible at idle from outside, with that Diesel-like tapping sound.
.... Of course, they perform efficiently and better than non D/I motors (comparatively) from the get-go, and we don't know their true long term lasting values yet, for better or worse.
.... Of course, they perform efficiently and better than non D/I motors (comparatively) from the get-go, and we don't know their true long term lasting values yet, for better or worse.
Trending Topics
Super Member
Joined: Sep 2006
Posts: 761
Likes: 23
From: Oklahoma
W211 E320 & W212 E550
My brother has an 09 model 335i with DI. It's been in the shop three times for injector issues and carbon deposits on the exhaust tips. Not sure if this is DI issues or not but it's been giving him a lot of trouble.
MB World Stories
The Best of Mercedes & AMG
Dubai Tuner Gives the Mercedes G-Class An Entirely New Look
Verdad Gallardo
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,747
Likes: 20
From: Central Pennsylvania
2012 S350 Bluetec 4Matic, Diamond White, P2
Huh? Pure BS. While it is trule our fuel is not as "clean" as the European requirements, the fule systems in our cars are compensated for this. There is no known, factual reason that a DI engine can not achieve at least 500K miles. Diesels with DI have been beating this figure for more than two decades, while burning a fuel considerably dirtier than gasoline. This is just uban legend hype that gets past on to the truly unknowledgable and paranoid. Just my two cents.
Thread Starter
Super Member
Joined: Apr 2007
Posts: 561
Likes: 2
From: New Mexico
2014 E350, 2012 SL550
Huh? Pure BS. While it is trule our fuel is not as "clean" as the European requirements, the fule systems in our cars are compensated for this. There is no known, factual reason that a DI engine can not achieve at least 500K miles. Diesels with DI have been beating this figure for more than two decades, while burning a fuel considerably dirtier than gasoline. This is just uban legend hype that gets past on to the truly unknowledgable and paranoid. Just my two cents.
This thread on the W204 forum has some photographic evidence of known problems with some DI engines. The thread gets a little personal in places but does thoroughly cover the subject.
Regards,
Don
Member
Joined: Feb 2007
Posts: 192
Likes: 1
From: Washington, MI
2011 E350 4-Matic Sport
So all you guys with the 10s and 11s wouldn't trade your engine for a 12 DI? Because i would in a heartbeat, I wish i had that extra HP (for the V6).
No reason to rag on DI engines or find excuses on why our model engines are better..Just saying.
No reason to rag on DI engines or find excuses on why our model engines are better..Just saying.
Thread Starter
Super Member
Joined: Apr 2007
Posts: 561
Likes: 2
From: New Mexico
2014 E350, 2012 SL550
Anyone who keeps their cars long term must take into account the potential problems of DI. MB has not given any detail on how they have addressed known problems from other manufacturers. I trust MB engineering, but as Ronald Reagan said: "Trust but verify. "
Regards,
Don
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,640
Likes: 11
From: GMT -8 hours
Mercedes-Benz
This thread is hilarious. DI engines have been around for a while... in diesel even longer! Lexus/Toyota has a port/DI system in their motors and it seems to have the best of both worlds.
Member
Joined: Dec 2012
Posts: 133
Likes: 2
From: Pittsburgh
2012 E550
Plenty of experience with carbon buildup
This is a problem that doesn't exist on the diesels because it is a different type of fuel. I just came out of a 2008 Audi S5. I put 70k on that car. I had the check engine light come on multiple times due to misfires on 5 or more cylinders. At 55k, a couple chunks of the carbon broke off, and wrecked the catalytic converters. The problem has to do with oil making it through the EGR. After a full cleaning the car ran fine, but I had misfires about 5k miles later.
For the S5, I discovered that almost none of my local gas stations were on the top tier gas list. The Mercedes manual explicitly says to make sure you use gas from these stations. It makes a big difference as it helps to keep things clear in the first place.
The list is here: http://www.toptiergas.com/retailers.html
For the S5, I discovered that almost none of my local gas stations were on the top tier gas list. The Mercedes manual explicitly says to make sure you use gas from these stations. It makes a big difference as it helps to keep things clear in the first place.
The list is here: http://www.toptiergas.com/retailers.html
Member
Joined: Sep 2012
Posts: 204
Likes: 6
From: England
Mercedes E350 CD Iridium silver convertible 2010
Want a cleaner that really works on injectors BG44k for either petrol or diesel engines. Is not cheap and used every 15-20K keeps the top of the engine and fuel delivery system very clean.
Compared to other things on the market redex or equivalent which are 2/5ths of useless, this stuff really works.
In fact some top end marques Bentley, Lexus etc use it as part of their service.
If you have never used any cleaners and your car has reached say 50k, then the carbon build up will be difficult to clean unless you use one of these special injector systems where they hook up your car and run for about an a hour to clean the whole internals!!!
Compared to other things on the market redex or equivalent which are 2/5ths of useless, this stuff really works.
In fact some top end marques Bentley, Lexus etc use it as part of their service.
If you have never used any cleaners and your car has reached say 50k, then the carbon build up will be difficult to clean unless you use one of these special injector systems where they hook up your car and run for about an a hour to clean the whole internals!!!
Last edited by theraven333; Jan 3, 2013 at 04:05 PM.
MBWorld Fanatic!
Joined: Jul 2009
Posts: 1,915
Likes: 262
From: Ontario,Canada
...24 GLE53
I think the problem mentioned in the article was the alcohol in the gas. Diesel does not have alcohol which may explain the longevity. I have read about this before on the Porsche site. In Canada Shell 91 octane gas does not have alcohol (ethanol) and may be an alternative. I am not sure if the US has gas without ethanol?
My wife had a 2007 BMW 335i that had fuel pump issues. I am not sure what caused the problem at the time but it was a common problem on those first DFI TT engines.
However, once you drive these new DFI engines, there is no going back to port injection especially the turbos with high torque.
My wife had a 2007 BMW 335i that had fuel pump issues. I am not sure what caused the problem at the time but it was a common problem on those first DFI TT engines.
However, once you drive these new DFI engines, there is no going back to port injection especially the turbos with high torque.
