More likely that is some color from having the crossover pipe cleaned to remove the coked oil in it.

Easy to take off -- remove the two bolts at the top and pull off the 0-ring at the turbo end. Get new gasket and o-ring for re-installation.

Watch out for hunks of coked oil falling into the turbo!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!