|
|
|
|
|
#1
10-03-2006, 10:10 PM
|
|||
|
|||
Please explain how variable valve timing on my M104 works...
I own a 1996 E320 equiped with a M104 engine. Please explain how the variable valve timing operates and what the symptoms are when it doesn't function correctly. At times, my E320 feels a little sluggish off the line and I'm wondering if valve timing might be the culprit.
Chris 
|
|
#2
10-03-2006, 10:33 PM
|
|||
|
|||
|
Intake valve timing advances 20 degrees @ 3K rpm/no load.
You can test for voltage at advance solinoid....
|
|
#4
08-19-2009, 09:44 AM
|
|||
|
|||
|
The 3k mark is the on, when crossing 3k and accelerating. It's also the off, when crossing 3k and decelerating.
I don't understand your question about on/off vs continuous. The intake valve timing advances 20degrees at 3000 rpm and stays advanced until redline. At any rpm below 3000, the intake valve timing is non-advanced.
|
|
#5
08-19-2009, 10:50 AM
|
|||
|
|||
|
The 3K RPM spec is w/o load only!
When driving, under load the cam advance happens at 1500 rpm & goes back to retard at 4200 rpm. As suggested it is only ON/OFF system. SO Yes, the lack of cam advancement could cause a hesitation.
__________________
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
|
|
#6
08-19-2009, 11:30 AM
|
|||
|
|||
|
The cam advance @ 1500 statement confuses me - I feel a sudden surge of power at about 3250 RPM on my E320. I figured that was when the timing was advancing???
__________________
08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280
|
|
#7
08-19-2009, 11:40 AM
|
|||
|
|||
|
Quote:
On-Off is like 20deg when On and 0deg when Off.(so it's either 20deg or 0 deg only and nothing in between) Continous is like 0deg when off and slowly increases, then 2deg, then 5 deg, then 10 deg till 20Deg Thanks
|
|
#8
08-19-2009, 12:41 PM
|
|||
|
|||
|
At 3200 you are feeling the variable intake flap change positions.
Changing the intake runner length is worth 20+ HP's.
__________________
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
|
|
#9
08-19-2009, 01:42 PM
|
|||
|
|||
|
Quote:
__________________
08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280
|
 |
| Bookmarks |
|
|
Linear Mode
