I have just changed the oil and filter on my 1997 1.9td. The square housing section at the top that the filter screws up to has started to twist with the filter. I have managed to get the filter undone and replaced but concerned i'm going to have issues next service. Managed to tighten the square housing as much as possible but it is weeping very slightly. Has anyone else had this problem? Am i going to have to replace the whole filter housing that joins the block, or can it be repaired?