It is very easy to break those things! What works for me is to use a little silicone grease on the o-ring and backside of the carbon seal itself to hold it all together. Do the same for the thrust bearing to keep it from falling off the bearing housing when you try to put it all together.
Also make sure your thrust bearing is not hanging up on the dowel pins on the bearing housing, and your thrust spring is installed properly in the backplate.
When you go to install it all, put the backplate on the work bench, set the bearing housing into place and then install the bolts. Tighten in a criss/cross pattern and all should be fine!
All the parts, minus the quad ring. This is a 360* kit, yours might differ
CS spring installes small end to backplate
Install lock plate, turn it 90* to position as shown
Install oring next, use silicone grease, white lithium or assembly lube
Install seal, it should float when pushed, with no binding at all.
Install star spring, it should be concave when installed (bowed into backplate)
Coat thrust washer, and bearing housing with assembly lube to hold thrust bearing into place
Install bearing and quad ring
Place bearing housing down carefully on seal plate and start bolts
Tighten down in a criss cross pattern evenly. Use loctite on all hardware!
Hope this helps a little, feel free to ask me any questions!
Reed
reed@workturbochargers.com
205.516.3946