Lighting. Took these in pretty dark conditions with flash and garage/driveway lighting in the background. You can see the golden-orange glow on the red (Baldwin) filter as well.
The second picture shows, in the area below your finger, the edge of the center tube is exposed and not under the end cap. The black glue bead is seen going around the center tube, then the glue stops about in the middle of the exposed center tube edge.
I was talking the media to the end caps. You were talking center tube, so we were talking past each other a bit.
The gap doesn't matter, that's been discussed many times which you were in those discussions - the leaf spring or the ADBV makes a seal on the end cap. If that is "glue" (only the OP can verify), it doesn't look to be anything that would come off. Ever look down the center tube of about any oil filter made ... there's typically a big bead of glue around the end cap on the dome end where it meets the inside of the center tube.
I could see that we were talking about different things. I was talking about the glue coming off the joint because the center tube acts like a knife blade. The filter is not designed to be made with the center tube protruding inside of the fiber end cap. I think it does matter about the glue. It goes into the engine and either passes through or lands somewhere. This is not gluing as designed on the engineering drawing. The cap has a glue bead going around until the area where center tube is protruding, then the glue is mostly missing. This is manufacturing error, and it’s very common on this type of Fram.
First time I've heard that ... any sources of efficiency numbers?
