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What's inside that MANN oil filter? Taking it to bits...
Prompted by a discussion in the "OIL FILTERS: which one to buy????" thread, I have totally disassembled a MANN oil filter for the 616/7 engines.
Here is the cadaver. As you will notice, there is a dent on the side that made me feel less guilty about hacking the thing to bits. I first tried to get the top off by assaulting it with lots of sharp tools -- lots of them. Realizing that I was getting nowhere, I tried a can opener as per OM617Yota. That worked like a charm. That pretty white thing on top is basically paper -- when you take it off, you find cotton that looks like it's been in a fight. So at least it was well packed. This is all the junk that came out of the filter. Yeesh! Here is the inside of the filter. Both the inside tower and the outside shell are covered in some sort of thin cotton. The outside cloth is held on by the pressed flange at the top of the filter. On the inside cloth, a piece of tape at the top of the filter was holding the cloth on. Neither cloth was sealed in any way at the bottom. This rubber grommet is coming out just because I can take it out. This pressed flange needs to be unfurled to get the outer wall of the filter off. It's a pain to get started -- I used a flathead screwdriver to start unfurling it -- but once you have it going, you can use pliers to unfurl it the rest of the way. This was painful at first, but once I developed a method for doing it, it went swimmingly. Completely unfurled. I ended up having to hack at the top where the seam for the outside cylinder is joined so that I could unfurl the side, too. The side seam was easily unfurled with a small flathead. Once the side seam is unfurled, the cylinder pretty much peels right off. It's off. The center tower is held on by five spot welds at the base. Here it is coming out... Here's what's left. I started to peel the top off. Some sort of rubberized compound is holding the top onto the rest of the assembly and also holding the fins in place. Now it's almost off. Now it's off. I stopped here, but it is interesting to note that the compuond here on the bottom is a tan color while the compound on top is gray. Here is everything we took out. All in all, only one blister and one cut (all for the sake of science, of course). Not bad! I'll post an explanation as to how the filter works later, but duty calls and I must step away from the laptop for a little bit...
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." Last edited by Mölyapina; 01-11-2014 at 11:09 PM. |
#2
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Is the Mann filter different from the Gurl filter?
Dan |
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Thanks for taking the time and trouble to do this.
I had no idea that some sort of cotton material was in the filters. |
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Looks well built.
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CENSORED due to not family friendly words |
#5
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now we need someone to tear into a purolator, and a fram and compare them
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#6
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Meh. Not terribly impressed -- as OM617Yota's photos more clearly show this thing has dirt in it. Filtering dirt with dirt seems pointless, especially if the thing isn't fully sealed, which it isn't at the bottom of the large cylinder. Here is OM617Yota's description of what's in the filter. He has better pictures of the junk.
If someone gets them for me, I'll do it .
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." Last edited by Mölyapina; 01-11-2014 at 10:51 PM. |
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the wix filter is super easy to examine... there's only the pleats.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
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Maybe I'll take apart a MANN fuel filter apart tomorrow.
[EDIT]Looked at it tonight and it looks too tough for me to take it apart. The metal is much thicker. However, upon inspection, it appears that it is filled with that orange cartridge, so at least it's not filled with dirty cotton.[/EDIT]
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." Last edited by Mölyapina; 01-11-2014 at 11:08 PM. |
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Quote:
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CENSORED due to not family friendly words |
#10
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Quote:
The Filter was made in India and the Cotton Gin that was inside was not terribly firmly packed. It had more of the typical Trash in it and the Cotton was poorer than the other that people have cut apart. Worse the central inside Tube is not sealed on the Bottom like the Onter makes it is just the Metal Tube sitting on the Metal Bottom. The STP Filter that Autozone was selling was also made in India and it looked to be the same Filter. But, they could have change how the make them since then. I hope you can see the pics in post #278 http://www.peachparts.com/shopforum/diesel-discussion/104768-oil-filters-one-buy-19.html#post2119904
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84 300D, 82 Volvo 244Gl Diesel Last edited by Diesel911; 01-11-2014 at 11:27 PM. |
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OK, so I don't know how much -- if any -- difference clean cotton makes, but if it's available at a CHEAPER price than the MANN and isn't deficient in filtration otherwise... why go with the dirty? Furthermore, why call it the the best? That seems strange.
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." |
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The cotton junk probably does a better job of trapping and holding a larger capacity of contaminants than a pleated filter. The Mann filter has a pleated paper section, the sotton I assume for coarse filtering, the pleated paper for finer filtering.
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#13
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Quote:
I'm going to fire off an e-mail to them and see if I have better luck than Diesel911.
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." Last edited by Mölyapina; 01-12-2014 at 01:23 AM. |
#14
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Quote:
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Mike Frederick 1986 300SDL, 240K+ miles 1985 300D KaliKar, 270K+ miles |
#15
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the pleats are for coarse filtering of the main oil flow, the cotton only gets oil through the tiny bypass orifice. the cotton packing absorbs soot, and lets the oil pass through. it's at very low pressure, and very low volume, but it filters much finer than the paper.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
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