intake gasket is sweating coolant?
on all 4 corners? I wouldnt think so
That's why I'm wondering if most of the staining isn't oil, and it's only coolant on one?
I'm spitballing for sure, you're the one seeing it first hand, and I'm not questioning what you're seeing, just tossing out some stuff to maybe rule out in case it looks like one thing but is some normal mixed with abnormal?
I've gotten hyper focused on one thing before and turned a mole hill into a mountain - some outside perspective sometimes helps with that.
If it is indeed all coolant at all 4 corners then it's odd. The only way for it to really happen is for a lack of clamping on the Gasket, but like you said - it has an even impression.
Maybe felpro got a bad batch of material? Hard to say.
I'd verify everything is straight and flat with a straight edge and feelers, set the Gasket on a paper towel overnight, and then plan to reassemble with right stuff, thread sealer and ample torque. What else can be done, right?
