Just last weekend I replaced my right front caliper because it was sticking. I sent the rotor out to be cut and bled the system after reassembly. By the time I got home yesterday afternoon once again the caliper was sticking and the brakes were smoking. Before I pull it all apart again do you think replacing the rubber brake line would be a help? The truck has 240k and that brake line might be the original, I don’t remember. Thanks.

Yes, the hose very well may be collapsed internally. This will allow pressure to be pushed through the collapse, but the collapse will keep the brake fluid from returning. Make sure that the caliper pins are properly lubed.

If you do decide to replace the hose, replace both sides.

This has internally collapsed brake hose written all over it. If your caliper binds and does not release when you crack the bleeder, it's the caliper. If it does release when you crack the bleeder, pressure is being held on it. Apply your brakes and get the caliper to stick again, then crack the line at the other end of the hose. If it does not release, your hose is bad; if it does, the problem is further upstream. (This rarely happens, but it might if, for example, the brake fluid has been contaminated with oil and the master cylinder seals swell up.)

When I see this, if I have any doubts about either, I recommend the caliper and hose together. Hopefully the fitting on the steel line isn't frozen. It has got to be able to rotate or you'll just break the line off.

Thanks guys, Ill pick up a new hose on thr way home today. The drivers side was done last year, so its just this one. Egregore, frozen line may very well be a problem. I have flare wrenches, and Ill soak with Liquid Wrench, but any other suggestions? Thanks guys.

I agree, sure sounds like a collapsed line. That's a big job for both sides. I'd farm it out, but that is just me.

Aside from the hose or pins it can also be a bad master cylinder, but generally that would effect both front brakes.

It has been two weeks now. Is it fixed?