Always check new parts carefully!

After I received all the new stuff, I started to check them in detail. There were quite some things to improve:
the oil cooler adapter had some burrs in the flow passage of the oil:

with a little action of the Dremel, I removed those burrs in no time (sorry for the blurry pic):

As mentioned in my previous post, the fittings of the adaptor looked strange somehow - but only after I tried to assemble a hose fitting. It just didn't work. I measured inner and outer thread diameter as well as thread pitch, all seemed fine

Upon closer look, it dawned on me that the thread is LH (left handed), so it was no wonder the hose fitting didn't fit!