Originally Posted by tecgod13
Thats the timing cover. It covers the 'timing' gears, which are the gears from the crankshaft to the camshaft and injection pump. Its a direct route down into the oil pan, so if it corrodes away behind the waterpump you might have a big problem. Although I haven't heard of that happening.
Figured that whatever was behind there was important. I'm hoping that getting some good quality AF in there will slow down the process. Should have taken a picture. It was pretty unbelievable.