I've finally finished getting my new freshly built D16Z6 in my car, and its supposed to get tuned tomorrow. But now my problem is I have a coolant leak. It appears to be coming from the fast idle thermo valve(or at least thats what I think it is. Is the FITV just under the throttle body with one small coolant hose going to it?). Anybody have any ideas as to what may be causing it? Is there some kind of gasket behind this thing? Do I need to replace the whole FITV?