leaking uim is a different story completely it the uim springs a leak on its coolant passages than it is a straight shot to the cylinders and yes if it was run for to long like this that it would have made its way down past the rings and in to the crank case. but since the op is supercharged it is a bit of a different game since none of the coolant that makes its way up to the sc or throttle body on these cars is prone to spring leaks.