The cranl pulley retaining bolt washer is not flat, or at least it's not on mine. Which way round should it go? Bolt into the dished/concaved side, or should it sit on the domed/convexed side? (Always had it sit in the concaved side but want to check if that's corrrct.)
Thanks.

I've always fitted them the other way, bolt to the domed/convex side, I've no idea why, I just always have. I haven't had one fall off yet!

with David on that convex to the bolt head.

I just recon the pressure is concentrated closer to the thread that way round if that makes sense.

Thanks gents. That might explain why I managed to undo the bolt without a wrench!