Hi. I've been loosing a bit of coolant recently. Not loads, but enough to get it sorted. Temp stays dead on 90 as it should, and I had a new metal pump a couple of years ago. There's no water in the oil and there's no oil in the water. I had a look to see if I could spot where it's getting out and found this which is located here And I think that looks suspicious. My questions are - do you agree? And what is that bit called? Thanks!