M5 T/Chain (detailed) (archive)

In light of recent events, this seems pretty trivial, but life goes on.
Car makes noise on cold start that could be t/c, a tensioner or piston slap. Pulled cam cover to inspect. Chain has approx +/- 6mm up and down play (perpendicular to deck w/top rail removed) This does not seem excessive compared to other T/C engines I've done. Also has approximately 1-1.2mm axial slop (front to rear slop within chain itself. This does seem excessive.) What is the typical failure mode of these chains? Are any of the tensioners hydraulic. (Maybe check valve is bad and it takes a while to pump back up?) The following info would be very helpful.

Reprint of appropriate pages from manual (if available, will gladly buy these!)

Looseness (wear) spec for chain.

Any info about tensioners and failure mode.

Approx. time for skilled mechanic with well equipped shop to do job?

Required parts list

Any recomended enhancements (Dinan exhaust sprocket? Fahey hub?)

I am planning to do chain and tensioners if needed but want to ensure I fix root cause of problem. Any help or advice would be appreciated.

TIA, as always
Mark

Follow Ups:

Did mine ian m635 uk 09:07 9/15/2001 (0)
Re: M5 T/Chain (detailed) Neil Deshpande 00:06 9/15/2001 (0)
Re: M5 T/Chain limited insight (long) jeff h 21:08 9/14/2001 (0)

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