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  #1  
Old 07-07-2019, 10:18 AM
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Cut Open Hengst OM617 Oil Filter

Previously had a thread on a Mann filter I cut open. Wanted to compare the Hengst to it. This one was in place at least seven years and 3000 miles, and I put around 300 miles on it before changing.

Media and potting was in perfect shape and perfectly fine for that time in use and contact with oil. No concerns.

Same cotton gin type material, this one has louvers in the bypass section instead of holes, and no landscape fabric type material to keep the bypass section from coming out. Not that thereís any practical chance of losing material from the bypass section given how tight pack and intertwined it is. Itís just not practical.

I didnít get this one as far apart as the last due to time. Still itís well made and no concerns with its use.















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Current Diesels:
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  #2  
Old 07-07-2019, 07:33 PM
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Thanks.
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  #3  
Old 07-08-2019, 12:21 AM
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Good to know, thank you
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  #4  
Old 07-08-2019, 12:38 AM
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What is good to know about this?? R u guys serious
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Old 07-08-2019, 12:42 AM
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Quote:
Originally Posted by tdoublenastywitit View Post
What is good to know about this?? R u guys serious
This has generally been common knowledge for well over a decade.

My interest was more the condition of the full flow element after sitting for so long. And it was just fine.
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Current Diesels:
1981 240D (73K)
1982 300CD (162k)
1991 350SD (113k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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  #6  
Old 07-08-2019, 12:43 PM
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Originally Posted by tdoublenastywitit View Post
What is good to know about this?? R u guys serious
It just satisfies a bit of curiosity.

I remember when I was a kid taking broken stuff apart just to see. It was not that I believed I could fix it.
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Old 07-08-2019, 12:46 PM
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Quote:
Originally Posted by JHZR2 View Post
This has generally been common knowledge for well over a decade.

My interest was more the condition of the full flow element after sitting for so long. And it was just fine.
Without being there to actually get a close look and feel it of course I am not sure. But, to me from the pictures it looks like the full flow paper is kind of deteriorated. The give away would be if the material ripped easy when you tore it.
To me it also looked clogged up a bit.
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Old 07-08-2019, 09:23 PM
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Quote:
Originally Posted by JHZR2 View Post
Previously had a thread on a Mann filter I cut open. Wanted to compare the Hengst to it. This one was in place at least seven years and 3000 miles, and I put around 300 miles on it before changing.
Shocked!, shocked!!, shocked!!! I tell you I was - the shop manual prescribes 10,000 km oil/filter change intervals "but at least once a year with year-round multigrade oils and at least twice a year with all other multigrade or with single grade oils".
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  #9  
Old 07-08-2019, 11:35 PM
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Quote:
Originally Posted by Diesel911 View Post
Without being there to actually get a close look and feel it of course I am not sure. But, to me from the pictures it looks like the full flow paper is kind of deteriorated. The give away would be if the material ripped easy when you tore it.
To me it also looked clogged up a bit.
It took a lot of work to tear the media away to even rip that sample... like, pry with a screwdriver and pull hard. Certainly did t tear easily.

Ive taken apart other filters, much less time in oil, and certainly theyíre no different.

I have every confidence in that filter, despite the age.
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Current Diesels:
1981 240D (73K)
1982 300CD (162k)
1991 350SD (113k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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  #10  
Old 07-08-2019, 11:38 PM
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Originally Posted by WDBCB20 View Post
Shocked!, shocked!!, shocked!!! I tell you I was - the shop manual prescribes 10,000 km oil/filter change intervals "but at least once a year with year-round multigrade oils and at least twice a year with all other multigrade or with single grade oils".
Except that I parked the car in 2012, and a few kids and a lot of work, travel, etc. later, Iím driving it again. I had some concerns about going too far on the filter, which is why I wanted to tear it apart. But nothing really to be concerned about... would I routinely go that long? No.

That said, Honda allowed two 7500 mile OCIs on a filter, and my Saab allowed up to 36k km and two years... so the wildcard was years. And again, the potting and whatnot looked quite good.
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Current Diesels:
1981 240D (73K)
1982 300CD (162k)
1991 350SD (113k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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  #11  
Old 07-10-2019, 01:57 AM
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But, but ~

It's so DIRTY ! =8-) .
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1984 300CD KEEPER ! 440,XXX miles
1984 Euro 300TD Fully optioned SWMBO's
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Krazy Kommie Ural Motos (3)
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  #12  
Old 07-10-2019, 12:21 PM
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I know you're joking, but I've actually heard that before.

Yes, it's a filter, it's SUPPOSED to be dirty. If it's been in service and it's CLEAN then it's not doing it's job.
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  #13  
Old 07-10-2019, 07:18 PM
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Red face Sorry 'Bout That Chief

I thought I had the sarcasm font on..... .

Yes, I'm a weisenhimer .
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-Nate
1982 240D creampuff 370,000 miles
1978 300CD back from the dead&1980 300CD ~ SOLD
1984 300CD KEEPER ! 440,XXX miles
1984 Euro 300TD Fully optioned SWMBO's
1974 350SLC 4 speed stickshift SOLD & missed
Krazy Kommie Ural Motos (3)
BMW Moto R60/6 Barn Find, 8,000miles
1959 VW #113 Deuxe Beetle, 36hp engine, stock
Junk, Rust, Arthritis, Crushed Spine,Broken Neck&Back
Memories, Peace Of Mind
facts & reality don't change because you can't handle them
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  #14  
Old 07-10-2019, 11:20 PM
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???? I did say I knew you were joking.
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