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Louvers - Again, AMSOIL EaO filters
- Thread starter OVERKILL
- Start date
/jk
Makes me sit back and smile, knowing I’m using 1997 or newer Allied Signal Tough Guards without these “louvers”.
I’m just guessing if some sort of “tooling or die” punches those louvers that its worn out and needs replaced. I don’t know the manufacturing background but just a thought.
Champ PH48XL would be my choice.
OVERKILL
$100 Site Donor 2021
Yes, those look great, nice and open.
I might throw one of these on next.
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That, and/or not setting up and maintaining the louver forming machines correctly. It comes down to people controlling the manufacturing proccess. This is where a manufacturing engineer and some continuous QA needs to be involved. Not just setup a machine and never check on what it's doing.
Of course 99.9999% of people don't know louvers exist inside an oil filter, or that they can be essentially closed. These reports of people saying their engine was making noises with a new filter should be looking to see if the louvers (if it has them) are mere slits causing the filter to be choked way down and the PD pump to be in relief, causing the oil supply to the engine to be cut way down.
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If pressure drop through the filter is too high, it will bypass, so the engine still gets full oil supply, but it's not filtered.
I'm also not sure where the controlling restriction is in an oil filter. Is it in the louvers or the media?
If the oil filter is basically clogged (due to debris and/or very closed off louvers) and almost all the oil flow needs to go through the bypass valve, most bypass valves are pretty small and will therefore increase delta-p even more as the pump tries to force the output volume through the bypass. This can put the PD pump into relief or make a worn pump slip a lot. Of course a nearly clogged filter will cause different reactions on different engines.
If the louvers are mere slits and almost totally closed, then I'd say that is more restriction than the media. Keep in mind that there is a pressure drop across the media and then again through the center tube. All the filter component pressure drops added together equals the total pressure drop across the entire filter assembly.
My Mobil 1 M1-103A Extended Performance oil filters look excellent.
Wide open louvres.
Made by Champion.
Wide open louvres.
Made by Champion.
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Deleted member 89374
Mann Hummel makes the oil filters for Mobil 1. They're Purolator One clones.
Right now, yes, but they were made by Champ Labs for years up until a couple years ago.
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Deleted member 89374
That's right.
This is my worries with louvers since I purchased a Wix 1040 that had the same issue. When I tore it apart and looked the other way the louvers were all open, what if this is the case only in reveres, they look ok when you look at it assembled but the bottoms are not open, the only way you can tell is to tear it apart. I think I may be done with louvers.
Incorrect
The A prefix was made for quite a while under Champ. They A came into effect when the filters became rated for 20,000 miles.
"Holes, I need holes." George Constanza looking for a 120V duplex outlet for his Froggy machine.
Motorcraft used to have nice louvres (approximately pre "sticker) that were wide open and about double the "normal" size. Those I could live with.
From what we have seen in how its made videos the holes or louvres are stamped out of a roll of raw metal by a die. Then cut to size and rolled int tubes. Either a worn die or presumably incorrect clearance between the die rollers could cause malformed louvres.
From what we have seen in how its made videos the holes or louvres are stamped out of a roll of raw metal by a die. Then cut to size and rolled int tubes. Either a worn die or presumably incorrect clearance between the die rollers could cause malformed louvres.
OVERKILL
$100 Site Donor 2021
Update, my replacement filters did not ship from the Toronto warehouse, but rather the main warehouse, so they'll take a while to get here (still waiting on my UOA kits, coming from the same warehouse). I'll post updated pics once I have those in hand.
