I thought WIX assembled an Amsoil design.....
A local AMSOIL dealer has the exact same cut-open demo filter on display in his store.quote:
Mike--sounds like you bough a cut-a-way demo filter for show and tell.
Gary, I don't understand your logic here. ADBV's serve a purpose. That is why they put them on the filter. The engine manufacturers must specify that they should be on the filter, otherwise they would not be there. The ones on my filters generally work quite well. I usually test my used filters by seeing if the oil drains into my collection pan for a day or two.quote:
It obviously doesn't bother the engine manufacturers ..otherwise you would see TSB's telling everyone not to use Fram. Their ADBV's are almost assured to leak as they age ..or even right out of the box. You would also probably see recommended procedures for starting with a dry filter after an oil change.
Nice catch.. thanks for the explanation. Makes perfect sense nowquote:
Originally posted by stbeaver:
webfors, your pictures are comparing the top "engine side" of the filter base plate on an intact EaO13 filter to the bottom "filter side" of the base plate that has been cut off an EaO15 filter (picture posted by Big O Dave). No change in manufacturing or crimp, you are just comparing opposite sides of the base plate. The black gasket you see in Dave's picture seals against the ABDV, not against the engine block.
The center tube is spiral wound from a continous strip of sheet metal. The un-perforated part you see is the seam. They are made the same way most of the duct work in a Chiles is made, only smaller.quote:
It lloks as though the center tube is actually manufactured in 3 pieces. There are no holes/slots in the seam area where the pieces of the center tube are put together.