Fix a broken guitar neck?

That's an easy and fairly successful fix. Happens a lot.

To satisfy your curiosity...

jtpr wrote:

Very unlikely it's an end grain glue problem. The way that headstocks are attached, if they're not just cut out of the neck blank, is to join it a few frets up the neck with a scarf. An end grain glue up would never withstand the stress from the strings.

Especially Les Paul players.

Common break, weak spot from short grain. Leo Fender made a BIG improvement by not cranking the peghead back.

Fix is glue the break then insert a spline to reinforce after removing the fingerboard and peghead veneers using heat to break the hide glue. Pare the spline flush and reinstall the fingerboard and peghead head veneer, then repair the finish. If you want a playable instrument -- sharp glue joints along the edges of the fretboard are not kind to fingertips -- you'll pay a luthier the guitar's full value or more. Would be cheaper to buy a new neck, bolt on, hopefully, though installing a new dovetailed neck would still be easier than fixing a snapped peghead.

Yellow glue doesn't creep?

jtpr skreiv:

You might find some inspiration here:

I've experienced creep with yellow carpenter's glues on my solid-body instruments. I now use this:

--Steve