Preparing the door
Install the door hinges on the door and make sure that the lower hinge is in the closed position; this will give you a straight shot at it on installation.
Install the door latch; having the door latch installed will help with aligning the door, especially if you’ve taken on the job alone and then, install the door jamb sticker plate.
Prepare the door jambs and gap gauges
Before I mount the door I prep the rear door jambs and rocker panel with my panel gap gauge made out of pop-sickle sticks (you can use paint sticks), this will set the initial gap as well as help protect the jambs and rocker from an impact with the door edges.
Mounting and Aligning the Door
Once the door is mounted and the striker plate is adjusted so the rear of the door is aligned pretty well I move to fine tuning the door alignment.
Door Hinges 101
The body side of the hinges allow adjustments to be made: up, down and front to back.
The door side if the hinge allows adjustments to be made: up, down, inboard and outboard.
Each adjustment should be made to one hinge side at a time, tighten the bolts and then move to the next adjustment.
Problem and Solution
P: The gap between the top rear of the door and the quarter panel is too close; you need to widen the gap.
S: Make the adjustment at the top body side hinge; nudge it forward until you achieve the appropriate gap.
P: The bottom rear of the door is sticking out and is not flush with the body.
S: Make the adjustment at the top door side hinge; pull the top front of the door outward and you will see the lower rear of the door drift inward.
Top rear in or out = lower door side hinge
Bottom rear in or out = upper door side hinge
Setting gap and angle = body side hinges, up down, forward or back