|
|
|
#1
|
|||
|
|||
M119 EGR Clean Out
My 1992 400E passed its recent CA smog test easily,
except for the EGR functional test, which passed, but just barely. The tech applied vacuum to the EGR valve when the engine was idling. Normally the engine should stumble/die, but has to be passed if the idle decreases at all. Fortunately, the idle speed decreased a little. . The tech mentioned that the EGR would probably have to be "cleaned out" to pass smog next time. I've checked and cleaned the EGR valve, it operates freely. But the idle speed still only decreases a little when vacuum is applied to the EGR valve. Is there a good/recommended way to clean out the EGR passages on an M119? And what about the deposits that are removed, is there any need to be concerned about where they end up? Thanks, Forrest |
#2
|
||||
|
||||
Do a search on cleaning egr line. You use an old piece of speedometer cable and "roto-rooter" the line out from the egr valve to the intake manifold. I do not get too concerned with the stuff that gets rooted out going into the intake.
Make sure that the piece of speedo cable bends easily at the very end to insure it gets around any sharp bends in the line. I have had to do it on my E320. It will make the check engine light come on and give you a "faulty" egr code if it gets completely plugged.
__________________
Jim |
#3
|
||||
|
||||
Your search should locate a post, or series of posts by Steve Brotherton (I think) describing this procedure. Even haas some pictures of before and after. Should be very helpful.
__________________
Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#4
|
|||
|
|||
Jim and Mike,
Thanks for the replies. I've seen Steve Brotherton's article that describes the procedure he performed on a CLK(?). That engine has an external EGR line so there would be less concern about stuff getting into the intake. The EGR passages on the M119 are incorporated into the head so you can't see where the crud is going, which makes me nervous. Forrest 1992 400E (191k) |
#5
|
|||
|
|||
I too have an M119 (1994 E420) I keep getting a facult code 5 which is of course the ERG valve. where is the egr valve and where is the entrance to the line that needs to be roto-rooted?
|
#6
|
|||
|
|||
The EGR valve is located at the left (passenger) front
of the engine. I think you'll need to remove the plastic "cowling" piece in that area to access the valve. The passage is under the valve and integrated into the head. You have to remove the EGR valve, two bolts I think, to access the passage. HTH, Forrest |
#7
|
|||
|
|||
ON the M119 engines, EGR flow malfunction requires removal of the intake..
The flexible tube between the upper section & plenum is always the problem.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#8
|
|||
|
|||
Quote:
on man, sounds like more work than it was to change the oiler tubes. I don’t know what the area looks like, could you tell me a little more about this hose. is it a small vac line, or some other large rubber hose? Removing the entire intake means opening up the fuel system correct? Seems like I can’t just remove the EGR valve and poke around eh? I'm gonna go search the forum to see if there is a thread that talks about removing the intake. does that mean I need to remove the MAF and throttle body (I kinda forget if the throttle is connected there or not)? BTW I see you've in snellville. I live like a min away from ronald regan. |
#9
|
||||
|
||||
So what happens if the EGR were to stop functioning entirely on an M119? Power loss? MPG loss? I assume there will be a CEL, but is that it?
|
#10
|
||||
|
||||
Does a faulty EGR valve or clogged tube cause the engine to have a bad idle where the engine sometimes will almost die when the throttle is depressed?
__________________
1992 Mercedes-Benz 400E 2002 Mercedes-Benz ML500 |
#11
|
|||
|
|||
Quote:
M.B.Doc, does intake manifold have to be removed??? What does "upper section" refer to? Thanks, - Forrest |
#12
|
|||
|
|||
Forrest,
Is that an updated sig in your 2001 posts, or did that car have 191k 9 years ago? How many miles now?
__________________
former: 83 300D, 97 C230, 93 400E current: 08 C300 Luxury , 92 500SL |
#13
|
|||
|
|||
Will_w202,
Yes it's the same one, car now has about 216k . I've been commuting by bicycle for almost 8 years. - Forrest 1992 400E 216k |
#14
|
||||
|
||||
Quote:
|
#15
|
|||
|
|||
Dave,
Thanks for the info. Looks like a 'bit of work' to clean out the EGR passage(s). Do you know which item is the flexible tube that M.B.Doc referred to? - Forrest 1992 400E 216k |
Bookmarks |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
DIY-disabling EGR and Air recirculation! | rwthomas1 | Diesel Discussion | 47 | 09-20-2022 10:16 AM |
1985 380 with lost EGR valve | Cape Bob | Mercedes-Benz SL Discussion Forum | 0 | 07-23-2004 01:06 PM |
How do I clean the throttle body on an M119 engine? | zeronero | Tech Help | 5 | 08-28-2003 10:36 PM |
'97 E300D surges. Resonance Flaps or EGR valve | jessie_eaton | Tech Help | 3 | 06-23-2003 04:02 PM |
96 C280 EGR Tube Cleanout? | Martineau Gauda | Tech Help | 1 | 05-18-2003 06:12 PM |