What's the clattering noise I hear when I start my car? It goes away after a few seconds.
This is common on the Mark VIII, and is caused by oil leakdown, causing the secondary cam tensioners to rattle. The 'fix' from Ford costs about $1200, and requires serious disassembly of the front of the motor. While annoying, it typically will not cause damage. Installation of a pre-oiler will stop this, and some have had luck with various oils and anti-drainback filters.