When the oil filter gets blown off, the usual culprit is the pressure relief valve in the oil pump. The valve can get stuck closed and bleed off excess oil pressure. The much higher than normal pressure leaves the pump and goes straight to the oil filter and blows it right off.
This problem is especially aggravated in cold climates when starting up with cold, thick oil. This has been a problem with 1999 Duratech motors.
Driver3000, you must have gotten an oil light when the filter blew off...did you not shut the motor down?
