Jim, thanks for your reply.
I have other concern, If I unbolt the screws on the cam sprocket, can I pull the lower chain rail with the busted pin without removing the lower cover? I already decided after I pulled the cylinder head to it take to the machine shop.

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94 E320 Silver 210000 miles
94 740il Pewter Green 97000 miles- Retired
05 S430 4Matic
07 Lexus IS250