Since you say that the wood under the hinge and around the hinge screw holes has split and gone soft it pays to check the wood of the door jamb adjacent to the hinge mount location as well.
Hinge dowel hole cracks door.
Fix it the right way not the wrong way.
Repair broken door hinges that hang loosely off the door by replacing the hinge pin or filling the stripped screw holes and reattaching the hinges to the door.
Wait at least an hour.
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Then reposition the hinge leaf and bore 1 8 inch diameter pilot holes.
Replace hinges that are totally.
After drilling a hole to accommodate the dowel and applying glue to both the hole and the dowel use another dowel of a larger diameter to set the smaller dowel into the hole.
If the screw holes seem stripped out or the screws don t fit tight enough when you screw the hinges back onto the door inject some glue into the holes.
Bore out and plug each of the remaining stripped screw holes the same way.
This method puts the top of the dowel flush with the surface of the hinge mortise.
Spread carpenter s glue onto a 3 8 inch diameter x 1 inch long wood dowel and tap it into the hole until it s flush with the jamb.
The wrong way is a temporary fix not cool.
If the attachment plate needs to be closer or farther from the edge of the door plug the existing screw holes with short pieces of wooden toothpicks and wood glue then redrill in the right.
Finish by securing the hinge by driving screws into the dowel reinforced holes.