Cable and turnbuckle like Curtis said. Actually I used a ratchet strap instead of a cable. Run it inside the door from the upper hinge mounting point to the opposite lower corner. Tighten it until the door is right.
I used to be a people person, but people ruined that.
Posts: 225 | Location: Usually home | Registered: January 27, 2013
Ive installed literally dozens of fiberglass and carbon fiber doors at work. I have never once needed to install a cable to fig door sag.
first, strong hinges. We make ours from scratch out of chromoly tubing and plate, also always make sure they are adjustable on the body.
second is to have a .080" aluminum plate on the inside of the hinge side, the same size as the inside of the door, again, cover as much area top to bottom as you can and have a 3/4" 90 degree flange on the straight side.
Once the door is hung with the door aligned, it will drop some due to taking up the slack in the door hinge pins and some flex from the door supporting it's own weight.
The fix now is to take the upper hinge where it attaches to the body, loosen the bolts and slide it forward approx 1/16". 90% of the time this beings the door alignment back to where it should be.
I don't stop adjusting till the door will shut like a factory steel door. If you have to lift the door to shut, your not done adjusting.
No cables needed.
Also watch how much of the inside of the door you trim out. The more you cut out, the weaker you make the door structure. I used to cut out the whole middle (but would have a dzus in aluminum or carbon fiver door panel), but now I cut access holes for the hinge and latches most of the time depending on the door construction.
Door sag isn't an issue we struggle with, rather the real issue with most of these doors is they are racked. Many manufactures seem to be clueless how to glue the two halves together and not rack the door. When it's racked, it makes it VERY difficult to align to the quarter panel, rocker panel, a-pillar and fender.
First thing you should not do is cut the whole inside of the door out, hand holes only. you need to build a structure or frame in side door. we use 3/8 chrome moly. attach hinge to door latch, latch to bottom hinge the tie hinges together and put a jack bolt in the center of all this. Don't use the door for structure its cosmetic. Basically your going to build a swing gate inside the door..
Posts: 22 | Location: ohio | Registered: August 15, 2017