[Teri]

2008 9.3 aero conv 6 cyl turbo, has coolant drip spot on 1 1/2 -2” aluminum cover at middle looking from bottom of car, I think between flex hoses. I checked cap, thermostat, hoses and top engine area and it appears dry. This spot appeared after I filled reservoir with dexcool 50/50, level below tab by 1/2 “ and ran engine about 20 mins. Outside temp is 90s & humidity is 90%. The auxiliary fan did not come on.
Anyone have an idea what could be the problem?

 

[Joshinator99]

The coolant reservoir itself is prone to cracking & leaks, so take a closer look at that.

 

[zinfandel]

One of my two short hoses coming off the front of the reservoir had a leak for quite a while, so slow I couldn't see it or feel it. Finally it developed a small crack. I replaced them with the shielded hoses used on the NG 9-5, 2010-11.
Matt at eSaabparts knows the numbers. May or may not be your problem, good luck