Well, I attended Techfest East today and Pete McHenry did a great presentation on basics of rebuilding an E30 M3 motor...I mean very basic, it was only an hour long.
But in his presentation he mentioned replacing the chain tensioner with one from a V12, and afterwards I asked why not ones from the E36 M3 (since thats what this forum seems to lean towards)
and he replied that the tensioner applied too much pressure and damages the rubber rails, and the V12 one is adjustable.
Interesting..I just wasted a couple hundred bucks...now I gotta go get a new one. Anyone have the part #s ?