Rear Spring Arm Inner Bearing Upgrade
So i am too cheap to buy that kit like you can buy from Bimmerworld. As i am changing every bearing on my subframe i thought, order them at least OEM new.
As i filled my motor mounts with PU i thought to do the same to these bearings but would need harder material.
The Motor Mounts have a PU with Shore A 50 which is actually pretty soft compared to the Shore D ratings.
Here a table with the ratings
I used the company "Sikaflex" for my motor mounts and went throught their catalogue and found "Sikaforce 301"
It has a Shore D rating of 73. So whole the Sikaflex 292 is at Shore A "Medium Soft" the "Sikaforce" puts you right to "Extra Hard".
With that resulting hardness it should be like a solid bearing. But i have no idea if it will actually stay in place during operation. We will see.
But both bearings were 30 Euro and the glue and gun were 40 Euro. I am curious and for me worth it. May be i can apply this later in some other bearings at the front suspension.
I ordered the glue and a cheap amazon glue gun and thought i might try.
This was my first time ever using a two component glue with a glue dispenser mixing the two components. The result is really not the prettiest but i am very satisfied so far.
For anyone going to try the same.
1. Clean the bearings. I used brake cleaner and actually a lot of dirt came out and loose bearing rubber came loose and i remove it. I did not use a brush or anything. Only sprayed it.
2. Tape all areas where you don´t want to have material.
3. Use gloves!
3. First time using the glue release some material from the glue to ensure correct mixing in the mixing nozzle.
4. Don´t be nervous
It is actually really easy. Apply the nozzle, push some glue out on some cardbox and go for it.
5. It won´t be pretty unless you do it more often or you are a talent.
