So I posted this on my build thread but I thought I’d make a separate discussion about this for awareness.
last year I bought Timken bearings for my front end rebuild from RockAuto. They all came in Timken labeled boxes. Turns out, one of the boxes had a Chinese bearing in it and I did not notice even when I installed it.This was the outer bearing (the smaller one). I only realized this when taking my front end apart a year later since I had vibration issues and this is what I found:
i do recall that the side with the Chinese bearing wouldn’t preload as well as I would have liked. Even when I really cranked on the 54mm socket with a wrench it still wouldn’t register anywhere near the force required on the fish scale. And I confirmed my spindles are fine so it wasn’t that.
here is the wear on the race after 30,000km.
I also had uneven wear on the preload washer which I thought was interesting. Only half of the circle had grooves dug into the surface, but the bottom half was hardly grazed.
long story short: check your bearings before you install them! Make sure they’re either Koyo or Timken.
last year I bought Timken bearings for my front end rebuild from RockAuto. They all came in Timken labeled boxes. Turns out, one of the boxes had a Chinese bearing in it and I did not notice even when I installed it.This was the outer bearing (the smaller one). I only realized this when taking my front end apart a year later since I had vibration issues and this is what I found:
i do recall that the side with the Chinese bearing wouldn’t preload as well as I would have liked. Even when I really cranked on the 54mm socket with a wrench it still wouldn’t register anywhere near the force required on the fish scale. And I confirmed my spindles are fine so it wasn’t that.
here is the wear on the race after 30,000km.
I also had uneven wear on the preload washer which I thought was interesting. Only half of the circle had grooves dug into the surface, but the bottom half was hardly grazed.
long story short: check your bearings before you install them! Make sure they’re either Koyo or Timken.