Also check out www.pindelski.com
Select Cars, Technical, then Motors. He shows chan rail and timing chain procedures on his M116 and M117 engines.
He posts here under Thomaspin.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".