Yes, the timing chain tensioner will be part of the job, a torque wrench certainly will be a required tool, I kinda skipped over the basic stuff. On the rocker carriers, or bearing brackets as Ma Benz calls them, you certainly will want to torque them properly (21nm, I believe is the "latest spec"), but since the head is the lower half of the cam bearing and the bearing bracket is the upper half, I don't believe that under NORMAL circumstances breaking the cam is a real hazard....Gilly