03 Excursion , studded, o ringed heads, 200 amp alternator, SG II, cooling fan override, 285/70/17 a
Yes. The valve keeps oil in the housing until the filter is removed. It is possible the valve is bypassing oil while the engine is running.. I could be wrong but I think uou have a leaks somewhere.This drains the filter housing when the cap is unscrewed, correct? Not the one-way valve on the housing oil inlet?
When my pump failed the excursion had to be towed home.