ST1300 coolant leak

[ST1]

I have a ST 1300 A6 i noticed some coolant staining on the right hand side engine block.
i have removed the side cover to inspect.

I am starting the bike and getting it up to operating temperature to try and see where the leak is.

 

[GhenghisKen]

What about that crack in photo number#2 just to the left of that bolt?

 

[ST1]

I ran the bike for 15 minutes the fans came on as normal and stayed at three bars on the temperature gauge.
The round hole above the square one was a bit wet, i place a cotton bud inside and there are green marks.

The big bolt is a mount for the radiator.

 

[gordow88]

What about that crack in photo number#2 just to the left of that bolt?

good eye.

 

[SupraSabre]

This is what a water pump leak looks like:



And from the Square hole, coolant leaking from the valley or thermostat cover.

 

[SMSW]

What about that crack in photo number#2 just to the left of that bolt?

Looks to me like a casting flaw, not necessarily a crack.

 

[vstrom.zrxdude]

Water pump cover o ring groove corodes, cleaned,resealed my cover only with old o ring silicone sealer ,holds coolant good now,184500 mi on mine now never replaced wp mechanical seal