BMW E46: Subframe Restoration. Part 5 - Differential

You... Now it's a bit further. This was the left, and this side is the right. It also has a measured ring and an oil path. Less hardest metal to not damage the axle. To not damage the little pinion gear. Hi guys, I want to speak with you a little bit about this thing. This stuff is called crush sleeve, and it's one time use only. This is because of it's design part. During the installation this part will be squished to provide needed preload for both wheel bearing. This is a new one, this is old one. And you can definitely see that new one is higher to provide some space to be bent during the installation. So because of this fact you definitely need to replace this thing. Unfortunately I broke my wheel bearings, not all of them, just two which were installed inside the differential case. This happens because I've sent the case into zimplating procedure with the bearings inside. And of course it's unacceptable, and bearings were destroyed by the acid involved in the process. Well, they don't look really bad, but for safety purposes I decided to replace them. Here you can clearly see the damage done by zinc plating procedure. This part is actually ok, because it was home in oil. And this is a new one. Don't forget to put this ring, this is super important. It has specific size, and it's impact for hex screw pinion gear patch pattern. So, definitely need to be installed here. Mine is frozen. I need to put a clarification here. Basically what I'm doing is measuring torque resistance. Torque resistance is a force created by a bearing. You can increase it by tightening the axle nut. And you need to aim specific value. Ideally for this job you would like to have a special torque range. Well, torque range by itself is a special instrument, but in this scenario it's even more specialized, because it's aimed to measure very small amount of torque. Let's say from 0 to 3 Nm. And it looks like this. Of course I don't have this kind of instrument in my arsenal, and because of this we will use another method, which involves domestic scale and self-made arm. This arm should have a gauge mount point in exact distance from the axle center point. This distance should be 10 cm. And by measuring weight in this way, our scale actually show us Nm force applied to the axle during the rotation process. And repeat this whole process again and again and again, until you get required value. Let's measure. Well guys, be really accurate with that, because tension is getting not linear. The last 10 degrees I've done, but it's like from 0.1, I think it's right now in our spec, so I'm even a little bit afraid of it. Let's measure. It's 0.55. Exactly the same when I started this job. I've done one more iteration for tightening. The last one was just barely couple of degrees. And it's increased my tension from 0.5 Nm to 0.8 Nm. And this one definitely last one round. There's no BMW specification for tightening this ball, but guys around the internet said that it should be from 0.6 to 0.8 Nm. Mine is upper border, but I've also put new bearing, so it should be OK. There's actually another method for calculating torque resistance. You can put a wire, something like that, and also measure it with some gauges. And with a little bit of mass, you need to make a proportion. For my case, it should set 1.5 kg, and this will mean that the torque resistance is 0.8 Nm. I don't know what the hell happens with my sealant, but on the video you can clearly see that some gas splashes coming out from the tube, and it's almost impossible to put a thin even layer across the entire surface.