Like said above, if guts are loose on any oil filter there is the risk of the ADBV getting washed into the engine due to delta-p and oil flow across the area where the ADBV would normally be pinched and sealed. Have you tested every oil filter with loose guts to see how the ADBV design will behave?You are the one that had the theory of the mount thread is going inside the center tube so the adbv is below it. Not so on Frams, they have that neck inside every one. Some Puros have the neck inside too, but not as much maybe. Take any Fram and look in the hole and you see the adbv well up inside. That folds over or goes in the center tube, as it is already partially inside, with the flow and down the hatch the adbv goes if it is loose. Others are not the same at all and won’t act the same.
So tell me ... why do you think it took 10,000 km for this failure to occur?
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