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?
Looking for Weber Parts or Porsche Posters?
www.youroil.net
--------------------------------------------------
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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