oil in coolent tank means only come from a couple of sources, none of them good.
Oil is getting onto coolent passages..either through a blown head or cylinder gasget, a blown shaft seal somewhere, or he did not have enough antifreeze over winter and there is a crack somewhere in the block, cylinder or head. The presence of coolent leaks near the intakes would lead me to opine that a cylinderhead gasket leak, crack, or warpage has occured.
But then, diagnosing stuff over the internet is fraught with dangers..........
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