This this look like a coolant leak

[JamesD]

Took these pictures the other day.

looks like they are coolant stains.

There was a drop in coolant a while back (on cold engine) but then it returned like magic to normal level???

So the other day on doing a visual inspection I noticed these stains on the tank, the cap, the bleed valve, and on the pipe underneath the engine?

Coolant is however at normal level and engine's not over heating?

What do you guys think?

Many thanks in advance.

[GoBruins]

It looks like there may have been a leak at one time. I would suggest cleaning the dried residue up and check again in a few days.

[RFM]

Check if the blue cap part # corresponds with the last up date, if not, replace. The traces on the bleeder (black) cap would also have to disappear.