Hi nine8six,
i've meant casing. Left engine block part and right engine block part. That means you have to be in very little tolerances when putting them both together. But i think most of the engines that where out of tolerance died young and where replaced under warranty.
I'm not shure if a roller bearing can handle all that tolerances. But hey, today i've learned from Jake that everything is an easy DIY fix - especially with the right tools and bearings from Jake.
Unfortunately i'm not willing to spend 2.3K for a special bearing and a special tool (plus the additional costs for a clutch and the workshop – so easily 4-5K) for a 12K car. Besides of that there is only a certified installer in the UK (which is outside the EU soon).
Well, i'm the guy who is willing to take the risk. If my engine dies some day, i'l replace it or sell the car as a roller. Also my car will get a water pump with a metal impeller installed soon. Just for being an outlaw.
Regards, Markus