I use oak dowels apposed to pine.
Hinge dowel hole cracks door.
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.
Then reposition the hinge leaf and bore 1 8 inch diameter pilot holes.
Pound some small dowels into the holes.
Wait at least an hour.
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.
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This method puts the top of the dowel flush with the surface of the hinge mortise.
Fix it the right way not the wrong way.
Bore out and plug each of the remaining stripped screw holes the same way.
The wrong way is a temporary fix not cool.
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.
Replace hinges that are totally.
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.
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Finish by securing the hinge by driving screws into the dowel reinforced holes.