Nice write up.

If while you were cutting through the Nuts with the Dremel Tool you had gone to far and nicked the threads it would not hurt anything because the Oil Cooler Hoses do not seal on their threaded area.
The Hose ends seal in the internal taper of the Nipple and the sort of rounded male portion of the Hose end. Some what like the Fuel Injection Hard Lines seal in the Injectors.

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84 300D, 82 Volvo 244Gl Diesel