I'm wondering if somebody could shed some light on this issue I'm having with my 99 4.6, I recently noticed coolant leaking between the cast iron elbow and the black plastic housing for the thermostat, Last night I went to pepboys and they provided my with two gaskets, one fiber with bolt hole cut outs and another ring gasket, I removed the elbow and switched out the thermostat and ring gasket with the new parts but I couldn't figue out where the other gasket went , it didn't really match up and their was not original gasket to scrape off when i removed the elbow. Today I noticed I'm still leaking, Is it possible I have no use for the paper gasket and is it possible to crack this plastic housing that holds the thermostat inplace?