Can't loosen rear fuel line

[deserttoad]

I have replaced all the rubber fuel hoses on my 79 except the small hose from the filter to the steel line. Figures that if I saved this for last, it would be the problem. I have turned the wrenches so hard I'm afraid I'll twist the steel line and ruin everything. I've soaked it for days in penetrating oil. Anyone have any tricks?

[Dean_Fuller]

If I remember correctly that requires 2 wrenches. One to hold the hard line while turning the nut. Just be careful and keep even pressure...should not twist enough to damage.

[Danglerb]

Counter hold, one wrench on each fastener.
Use "line wrenches" made for this type of work, like a box end with an opening just large enough to slip over the line, and typically much more metal on the part the touches the fastener.

[Danglerb]

Aluminum to aluminum can be a real bear. The line from my auto trans to my radiator was the shop "sword in the stone" for almost a week with various mechanics giving it a try to break loose. What finally did it was to put two large wrenches on it positioned a couple inches apart such that moving them towards each other loosened the fastener, then put a loop of rope around the ends of the wrenches and tightened the rope with a third wrench twisting the loop.

Fair chance one of both of the fasteners is toast after that much force, makes them warped out of round.

[deserttoad]

I had a flare nut wrench on each fitting, even had them clamped together for the day with pressure. Added heat from a heat gun with no effect. Finally added a cheater to each wrench and, yep, kinked the steel fuel line. So now I need to hunt an entire hard line down or bend myself a new one. More advice?

Ugh!

[Danglerb]

Counter hold should keep torque on the lines neutral, hope the lines are not NLA, some are.

[Simon928]

I ran into the same problem and ended up kinking my hard line when one of the wrenched slipped. I got a used one from 928 International for pretty cheap--$20 or something like that.