I was changing the front brake pads on my 84 300D and found that the right front caliper was frozen. I bought a rebuilt caliper to replace it but found when I tried to remove the old caliper the brake line nuts are so rounded and corroded that I cannot remove them. This is at the caliper and also where it connects to the steel line.

So, I am thinking that I should replace the steel line. I can see where it travels across the firewall and the clamp nuts on the right and left of the engine seem accessible enough, but the one behind the engine in the center looks like a challenge.

Any advice from someone who has done this procedure? I watched a video of a guy who cut out some old brake line and spliced in a new piece with a union. Or maybe run a new line across the firewall, zip tie it to the old line and not take out the old line. Not my preference but a possibility.

Thanks for any input.

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