If you are working alone, make sure to secure both ends of the chain while chaninge clamps, wires, whatever.

I was lucky when I dropped the slack end, it piled up on top of the crank and I could fish it back up. You may not be!

Also, if you always keep the chain on the sproket, it's easier to get the ends to match -- takes quite a bit of pull to get the new (and oily!) chain up to correct position if it wasn't there.

Ditto for the pulled side, too -- you can goof up the injeciton timing if the chain slips.

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!