While working on installing my new exhaust, I've discovered where my coolant leak is. The last bolt on the right side of the intake manifold is leaking into the valley & down the back of the motor. I managed to get a socket on it and it's tight. I redid the top end last summer. What would cause this and can I band-aid it without replacing the the valley gasket? I was thinking remove bolt and use some thread sealer & a dab of rightstuff.