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In conversion to m30b35 I went to install the oil chain tensioner from the donor e32, and found the bearing bolt does not exist on the b34 block nor is there a port or a hard spot.

Trying to find clues at REALOEM it appears the early models 3.5 did not have a oil chain tensioner.

Does this make sense?

Update. searched mye28.com makes lots of sense. Chain is shorter and shims are used to hold tension in chain.

With chain tensioner
http://www.realoem.com/bmw/showparts.do ... g=11&fg=30

Without
http://www.realoem.com/bmw/showparts.do ... g=11&fg=30

I've always just used the shim. It's a short chain, I doubt you would ever have a problem without a shim, but they're cheap.