[Mart]

With that few miles on it it is probably worth checking the torque on them all. Don't go mad, just tighten to the recommended torque figure. I'm not going to recommend a figure, but I used 45 lb ft on a recent build. Some might prefer higher. What I am not telling you to do is go tighter and tighter to stop a leak. That is not what you want to do.
Time rather than torque will probably stop the leak.
Mart.