W123 300D Oil Cooler - thread issue

[VickMorrow64]

Hi

Has anyone experienced a buggered thread when removing the oil cooler line from the oil cooler? I have a hose clamp holding mine on but fear if it ever came off my engine would sieze.

It looks like the male nipple(sticking out of oil cooler) is aluminum as is rest of oil cooler - I put a magnet on it and it did not stick. It also looks like a poor design with not that many threads. Anyway a new oil coiler is very expensive so i am considering getting someone to weld a steel male nipple onto oil coiler replacing the "soft" aluminum one it came with. The best I can figure is the male nipple (that oil cooler hose connects to) is 22mm OD & about 13mm long with a pipe thread of 1.5mm not sure what inner diameter is. My hunt is on for an allthread steel pipe, 13mm long and 22mm OD with 1.5mm pipe thread. I talked to a radiator repair guy and he knows a way to braze steel to aluminum - so if I can only find the allthread pipe I would be in busineess. Any help is appreciated