Out of curiosity, I just pulled the oil filter cap on both cars, to check the Hengst filters. Neither deformed--one has about 1K miles on it; the other about 2.5K. Just a data point--don't know if it means much.

BTW, it's amazing how clean the filters are, using Delvac1.

I have to agree on the Delvac 1 comment. I just changed the oil in my E300D TurboDiesel and was equally impressed. I did not have to wire brush my hands after the job either. And the new stuff actually stayed clear looking for about 50 miles, and it still doesn't look like the usual Diesel mud after 200 miles. Neat stuff. Just an observation, Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Here you have the filter in question.

Hengst.
Note the post-modern lines indicating cosmopolitan tension in a war time era. Subtle hints of anxiety with fine delineations....

five sided object sublimates a hint toward the Pentagon and
classical phallus symbol.

Attached Thumbnails

 

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

Once again the artist has compelled the viewer to
ponder the shearing forces of social tension and unrest.
Note the schizo-morhic object with repeated
Pentagonal (war) symbol contrasted by Round
(bubble head) symbol.

Interior is uneventfulas we find all grommets intact, core intact
and unobstructed center. Symbolism is strong for Harmony- Potential.

Attached Thumbnails

 

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

Finally we view the lone artifact found amidst this visual cacophony.

The beer drinking German-Elf. Historically the imp behind all
world chaos and disruption.
Note the bubbles inside the glass and the foam droplets outside the glass.
Very symbolic.

--Hengst

Attached Thumbnails

 

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

Greetings,

The filter looks somewhat like mine did but perhaps mine was six sided as the bend lines were more subtle and evenly sucked in. The top didn't seem to be deformed like yours but all sides had their mark of vast pressure or suction, that one is still up for debate from what I read. Had a day off today but ended up doing a road trip to pick up a new to me Blazer, so not much else besides baling the grass got done after I got home. Can someone please do the anti-rain dance for us here in Missouri. Two days of drying out and the grass or hay I should say is still wet to cut. Got more rain on the way the next several days, anyone need it?

Charles

__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan

unkl300d and can-do,

Well, the filter sure is bent. And the design of the outer can is different than the one on my MANN filter. Actually the Hengst one is much more perforated. The holes look to be small semi circles kind of punched into the metal. Looks like it is less restrictive to flow than the 90 holes of the MANN filter.

I guess I will have to find another way for the bypass filter flow to make it to the main filter discharge line.

Were the grommets tight on the center tube when you took it out? Which end was up? The canned end or the other end? The reason the can deformed is still that the flow through the bypass section was much higher than it is supposed to be, which makes it possible to develop a pressure differential across the can even though it has holes (lots of them!) in it. It seems there may be other means to allow the unintended flow.

How are the MANN or other replacement filters doing? Maybe you can save the grommets and see how they fit over the center tube of the oil cap when you change filters. There has to be an explanation for what happened and it bugs me that this one is so elusive.

Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Jim, the filter was installed correctly.
Handle side up.
The washers were fine on both sides. No obstruction inside.
I don't recall any difficulty in removal. I can only
assume that it went in without incident 3500 miles ago.

Yes, it is intriguing.

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

unkl300d,

This is a puzzle. There are three of those grommet/washer things. One at each end and one in the middle. I believe the one at the bottom is larger than the other two (one at the top and one just below the point on the filter where the can ends). So all three were fine?

Could just be a tolerance stack up where the inner grommet does not seal on the actual diameter of the shaft. Well, if it happens to more people, it may be worth some additional thinking, but it sounds like you guys have this behind you now. Sure is an interesting phenomenon. Good luck, Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Just for information, here are a couple of scanned images from the manual's description of the filter and housing oil flow path. One is close up of the filter and housing cross section showing the flow path, the other is the whole page it came from with some text I hope is legible. I will make two posts to try to get the attachments in, but have no idea what it will look like. Jim

Attached Thumbnails

 

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Maybe if I rotate it you can read it. Jim

Attached Thumbnails

 

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Here is the other one, rotated as other than twisting your neck a little they are legible this way. Jim

Attached Thumbnails

 

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

The filter is gone now.

I recall cutting it in half as the pictures show, and pulling some of the fiber out of the bottom portion in order to reveal
the center shaft better.

For some reason I do not recall pulling off or finding a center
grommet.

I do recall trying to pry off the top grommet but don't recall
whether I did accomplish this or not. I mention this because I vaguely recall
seeing or moving something black aside at some point..

So, if for some odd reason, the middle grommet had not
been installed in that assembly, apparently this would
cause such outcomes?

maybe that is what happened?

darn I wish I could remember better.
Before cutting it, I did look down the center and it was clear
with no obstruction.


By the way, thanks Jim for the diagrams.

That helped me revisualize.

Denis

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

unkl300d'

No grommet at the mid position would cause the bypass flow to join the main flow down the standpipe (21 in the figure) instead of through the orifice (5) in the return flow tube (22). That would increase flow through the top section as I suggested in the earlier posts, which can cause the can to see a differential pressure (the can becomes the throttling feature for flow). I guess I will visually examine these things better from now on, just to make sure they are going to work correctly. Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)