Hi Max - You wrote <<trying to cure a
rough idle, finally it dawned on me to unplug the electronic idle
control which did the trick>>
What does the idle control look like? Does my OM 602 have one? Although I
must admit, the idle is not noticeable since I replaced the motor mounts.
Then again, if I can make it even smoother I will --
Thx
LarryT
91 300D 2.5T (OM602-962)
OilAnalysis Time?
Looking for Weber Parts or Porsche Posters?
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--------------------------------------------------
From: "Dillon, Meade M CIV SPAWARSYSCEN-ATLANTIC,53310"
<meade.m.dil...@navy.mil>
Sent: Thursday, February 18, 2010 8:44 AM
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Subject: Re: [MBZ] Fuel delivery valve job
Regarding the old DV springs being shorter than the new, I found the
same when I did the job on my OM603 in my '87 wagon, but did not notice
any change in performance with the new springs. I was trying to cure a
rough idle, finally it dawned on me to unplug the electronic idle
control which did the trick. Now with rebuilt injectors balanced to
within 5 bar range and the rebuilt DV internals, the idle is pretty
smooth when warm. I plan to replace the motor mounts in the near
future.
-Max
-----Original Message-----
From: mercedes-boun...@okiebenz.com
[mailto:mercedes-boun...@okiebenz.com] On Behalf Of LarryT
Sent: Thursday, February 18, 2010 7:16 AM
To: Mercedes Discussion List
Subject: Re: [MBZ] Fuel delivery valve job
re the question about the oil I have used - Have been using Synthetic
since we bought this car ~3 years and 75K miles ago - I would describe
what I found in the intake as liquid black slime - what a mess to
remove.
It's going back together now - I cleaned it with lots of rags, paper
towels and simple green mixed with Carb/brake cleaner. It came out
pretty easily but was pretty messy.
I'm taking a break now - leaning over the engine is hard on the backs of
the legs! I dropped a intake manifold bolt so if I can't see it with a
light and grab it with a magnet I'll have to drop the lower panel some.
Thx for the suggestions - next time the intake plenum will go to a
machine shop - I've seen what they can do with a engine bloc - they must
have some great chemicals!
Hopefully I can schedule the work more ahead of time next time.
No problems with the delivery valves - all the o-rings were very dried
and cracked (they crumbled when I tried to remove them) - I also
replaced the springs and copper washers. The old springs were ~1/8"
shorter than the new ones - don't know what effect that compression had
(anyone know??) -- didn't have any problem assembling all the DV's - I
coated the o-rings and threads with a liberal amount of Kroil and the
o-rings slipped on easily.
I then centered the DV's in the IP and put the copper washer in place,
set the spring on the DV and then put the casing on and screwed it down.
Then followed the torque procedure.
No problems I know of - it made a bit of noise as the air slowly exited
the system - it is hopefully free of air now. I was surprised at how
much noise it made as the air was forced out of the system.
I'm really glad to have this job behind me though. I hope I get another
160,000 miles out of this set of washers, o-rings and springs -
My only surprise when when it came time to install the intake manifold
gasket -- it was for a 6 cylinder and I have a 5 cyl. A call to the
local
MB dealer solved the problem - the 6 cyl gasket is supposed to be
trimmed to fit 5 cylinders - once he said it I recalled that I'd done
the same thing last time I replaced the gasket.
Let me now if you have any questions -
LarryT
91 300D
Larry
'91 300D
OilAnalysis Time?
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--------------------------------------------------
From: "Peter Frederick" <psf...@earthlink.net>
Sent: Wednesday, February 17, 2010 9:48 AM
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Subject: Re: [MBZ] Fuel delivery valve job
I would also recommend changing to synthetic oil if you are not using
it now -- I had very little crud at 270,000 miles with synthetic, and
my brother had none, only liquid black slime.
A cracked head, however, will cause all sorts of crap to collect at
the EGR port, though.
Peter
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To Unsubscribe or change delivery options go to:
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_______________________________________
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To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
_______________________________________
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To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
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