2000 320Ci 2.2 vert MT
thanks. I never heard this annealing process honestly and I won't make damages due to fact that I can't find a spare oring 😂 I'll try to fit it as it is and if I have leaks, I'll try it.It's not under pressure as it's just sealing the reservoir. Also there is very little fluid contact because it's right up the top and away from where the fluid is held. I've never replaced or annealed this one for this reason and never had an issue.
Guess I have to apply a not so big torque to this bolt being aluminium. Right?