I recently bought an 03 gt that has a coolant leak. It appears to be leaking from the aluminum crossover. Does the top of the crossover separate with a gasket? Or is a whole replacement necessary? I can't find a listing for the gasket and most every thread I see recommends replacement, but those are usually situations with plastic crossovers. Pics attached...its leaking from the passenger side. You can see the dampness and rusty area where its been leaking.