Possible head gasket failure (already) or not?

[clarkey1984]

Hi all, I thought I'd check the levels in the t4 as I do every week to 10 days, and I am greeted with this emulsified crap in the header tank, there's no two ways about it, it's definitely oil, however, the oil is still golden and clean (although needed topping up) so the mixture of oil and coolant hasn't happened in both directions so to speak.

The car is running completely normally, with no obvious signs of anything wrong, although I'm not sure there would be any obvious tell tales when driving it, no overheating or anything like that.

Worst case scenario is that it needs a head gasket, although the engine had only done 90k or so when i got it, and I'd seen it with the head and cams out, and the brand new OE replacement gasket set there with the engine before I went to collect it, I've barely done 6000 miles since the engine was fitted to the car, so I'd be surprised if it is HGF.

This leads me on to a question about oil coolers, namely, do these have one, as I know on the old Vectra V6 I once owned, that mixed the 2 like this and it was a split line in the cooler that was the cause, so I'm hoping it may be something similar, as I really don't want to have it back in the garage again, not when I spent over 1500 quid on the car from march to June on a payment plan.

Many thanks in advance