Egr cooler leaking externally?

[Nilao]

My oil filter header arrived today. I'm pleased with the quality of the part even though it's used. I gave it a thorough washing out in my parts washer to make sure the was no dirt inside the passages. Will get to reassemble it tomorrow. As you can see in the picture the inside looks brand new. No corrosion at all. Has a casting date of 09/10. So it's just over a year newer than mine. I considered having the inside surfaces coated with pot-15 to prevent any corrosion in the future but with me in control of what goes into the radiator I don't think I have to worry too much.