I'd swear the vx220 manual says to torque up to 25Nm, and my sandwich plate bit pisses oil everywhere when I do that - i've been having to do mine up at around 90 🙂 Is it the same on yours, or do you reckon something is deformed on my engine?
Out of interest, if you were fitting it to another car, where would the oil pipe coming from the cooler go to? Just into the sump somewhere? The sandwich plate only has a single pipe from it.