Thanks for clarifying the "new".

Get a line wrench and use that. It looks like a box wrench with a notch cut out so that it can slip over the line. It is based on a 6 point box wrench. Crescent and open end wrenches will round off the shoulders of a fitting, or even nuts and bolts, if they are either very rusty, or seized by rust or corrosion, or good ole lock tite red.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D