What's a "killer dowel pin"?
During engine assembly, a steel dowel pin is pressed into the block to precisely locate its timing-gear housing. Over time, vibration can cause the pin to work its way out, and because it's made of steel, there is no working its way through the engine. To fix the KDP you have to tab it. This was the weakest point of the 12 valve. Mine was tabbed within my first 100 miles of ownership
