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 there’s any practical chance of losing material from the bypass section given how tight pack and intertwined it is. It’s just not practical.

I didn’t get this one as far apart as the last due to time. Still it’s well made and no concerns with its use.

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

Thanks.

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84 300D, 82 Volvo 244Gl Diesel

Good to know, thank you

What is good to know about this?? R u guys serious

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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.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

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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84 300D, 82 Volvo 244Gl Diesel

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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84 300D, 82 Volvo 244Gl Diesel

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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'83 SD, 2x '85 SD
You are entitled to your own opinions, you are not entitled to your own facts.

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 they’re no different.

I have every confidence in that filter, despite the age.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

Except that I parked the car in 2012, and a few kids and a lot of work, travel, etc. later, I’m 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.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

But, but ~

It's so DIRTY ! =8-) .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

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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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

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

Yes, I'm a weisenhimer .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

???? I did say I knew you were joking.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap