1. Cap not overtightened; given the design flaw where overtightening causes the filter housing to crack, I take special care NOT to overtighten by using an inch-pound torque wrench.The cause can only be due to the force applied when screwing the filter cap back, causing the force to be absorbed by the filter itself, the filter is over compressed, cannot resist the force, and absorbs it by twisting at the weakest point.
I have two hypothesis statements that can over compress the filter;
1. The filter cap is overtightened.
2. The Form of the filter does not match the Fit (Installed incorrectly, filter is too long by design, the incorrect filter).
this is easily disproved, simply put a filter in and pull it back out. There is no twist.The cause can only be due to the force applied when screwing the filter cap back, causing the force to be absorbed by the filter itself, the filter is over compressed, cannot resist the force, and absorbs it by twisting at the weakest point.
I have two hypothesis statements that can over compress the filter;
1. The filter cap is overtightened.
2. The Form of the filter does not match the Fit (Installed incorrectly, filter is too long by design, the incorrect filter).
Yep, no worries on the twist. The media on an Ultra is reinforced and can stand a bit more twist without blinking.Not a problem that's really worthy of worry, now my Rear Main Seal hopefully it's not going to get worse soon, as I don't have the time to DIY the repair at the moment. Don't trust my local dealer to do the repair either so there's that...........................................
I'll take a little twisty filter any day lol.
If you simply install and then remove the filter of course there would be no twist because it wasn’t left in the twisted position long enough to develop a memory.this is easily disproved, simply put a filter in and pull it back out. There is no twist.
Could be some possible vortex effect building in that filter chamber perhaps??If you simply install and then remove the filter of course there would be no twist because it wasn’t left in the twisted position long enough to develop a memory.
It would be an interesting experiment if someone installed a new filter, ran the engine for a few minutes to saturate the filter with oil then let the Jeep sit for a few days/weeks then checked the filter for twist.