Once the wood is the right size glue the inward facing side and then press it into place.
How to fill in old door hinge mortises.
Filling a mortise from an old lock is the essential first step to installing a new lock or using the door for other purposes such as a desktop or other use.
Take a plain piece of wood the width of your door and cut it down until it fits into the shape left by your former door hinge.
This may include covering over any wood stains left by the hinge.
Then gently score the spot using your utility knife creating a clear indication of how deep your mortise should be.
Place the tip of a hinge wing up to the front or back side of the door.
Adjust the mortising jig to the proper hinge size and door thickness.
Line the wing up so it is perpendicular with the outlined spot and if necessary mark this position with a pencil.
After that i gave the whole door two coats of kilz primer.
Install or remove the corner inserts as appropriate.
Hold until the glue starts to dry.
Depending on the inserts used jigs can cut mortises with rounded or squared corners squared corners must be finished later with a chisel.