Manifold/header/muffler/tail Pipe problems of the 2007 Porsche 911 Gt3

Coolant leak noticed at coolant manifold fitting during oil change. Engine was warmed up prior to oil drain, therefore was at operating temperature. Seepage at fitting into manifold was detected by smell and then located with light and mirror. I had to have the engine removed and the fittings welded by my local independent shop. All of the fittings were glued into the castings and were prone to failure at any time.