The warnings on heating the case and cover are about NOT using a torch as it can warp or otherwise cause damage. Do yourself a favor and buy a heat gun and a laser point thermometer. Both are relatively cheap these days. These are a mechanics best friend, well besides the BFH. Anyway you can easily and evenly heat the case with the heat gun and check the temps with the the thermometer. I find everything comes apart fairly easy around 180 degrees but I believe BMW calls for 212. It works great for changing the bearings too. Heat them and they come off easy. Heat the new ones and they go on easy. You'll also need to heat the cover for reassembly and the end play measurement game as well. Seriously buy a heat gun and you won't believe how you ever got by without one, a must have tool for this kind of work!