Took me six hours on the dot with no special tools. Probably faster next time unless it's so many years from now I forget how. Moving the PS pump is no big deal, since the tensioner has to come off anyway (mine was shot).

I'd plan on a new tensioner -- unless replaced recently, it's toast.

Peter

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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!