Replacing an Acoustic Bolt-On Neck
Remove the strings from your guitar. Loosen the strings as much as you can by rotating the tuning keys at the end of the neck. Once the strings have some slack, use a string cutter to cut it into 2 pieces to make it easier to remove. Pull out the bridge pin, which is the small ball shape at the end of your strings, to remove one half of the string, and pull the other end out from the tuning keys on the end of the neck. Be careful that the strings don’t scratch the body of your guitar since the cut ends may be sharp.
Take off the bottom 6-7 frets from the fretboard. Grip the metal fret bars as close to the guitar’s neck as you can with a fret puller. Squeeze the handles of the fret puller together to latch onto the fret bar, and slowly pull it off of the neck. If the fret doesn’t come off when you pull it, let go of the fret and place the fret pullers in a different section of the fret bar. Keep loosening the fret until it comes off easily. Continue working up from the bottom of the neck until you’ve removed the bottom 6-7 frets. You can buy a fret puller from music stores or online. If you don’t have a fret puller, you can also use a pair of cutting pliers with a flush edge.
Heat the fretboard extension with a steamer to soften the glue. The fretboard that extends onto the body of your guitar is held in place by glue that softens when you heat it. Turn on a clothes steamer so you can apply hot steam to the area where you removed the frets. Hold the steamer over the section of fretboard and wiggle the neck up and down to loosen the glue. After a few minutes, the fretboard should easily lift off of the guitar. You can buy a steamer from any home goods store or online. If you don’t have a steamer, you can also an iron on a low heat setting, but you may damage the guitar’s body if you aren’t careful. Wipe off any excess steam on your guitar’s body or else it could cause permanent damage or warping.
Slide a flat scraper under the fretboard extension to loosen it from the body. Carefully push the end of a flexible scraper under the section of fretboard you just heated. Start at the end of the fretboard and work your way up toward where the neck meets the body of the guitar. As long as the glue is soft, the fretboard will lift easily without causing any damage to the instrument. If the fretboard doesn’t come off easily, try heating it for another 5 minutes to loosen the glue again. Don’t try to pull off the neck entirely at this point since it’s still attached with bolts.
Reach inside the guitar to undo the bolts and slide the neck out. Guide your hand and a screwdriver into the hole in the middle of your guitar. Feel around the inside of the guitar to find the 1 or 2 bolts holding the neck in place. Use your screwdriver to loosen the bolts and remove them so the neck comes loose from the body. Once you remove the screws, lift the neck out from the guitar’s body to remove it.Tip: Some guitars may have the bolt on the backside of the guitar body. If you can’t find any bolts inside the guitar, then check the backside to see if they are located there.
Dry-fit your new neck on the guitar to make sure it sits flush. Make sure you get a new guitar neck that’s compatible with your type of guitar, or else it will not fit. Position the end of the guitar neck over the pocket and slowly push it down. Position the guitar neck so it sits flat against the top of the body and so the fretboard lays flush. Mark the position of the neck on the body with a pencil so you know how to position it. You can buy new guitar necks directly from the guitar manufacturer online, or you can buy custom-made necks as long as they match the style of guitar you have. Do not force the end of the neck horizontally into the pocket since you may damage the body.
Apply wood glue to the back of the fretboard that extends from the neck. Your new guitar neck will have a section of fretboard that extends past the end that sits against the front of the guitar. Put a coin-sized dot of wood glue on the fretboard that extends past the base of the neck and spread it around with a paintbrush or your finger. Make sure there are no large globs of glue since it may not set as well and will take longer to dry. Once you have a thin, even layer of glue on the back of the fretboard, you can move on.
Push the new neck into place and secure the bolts. Position the new neck over the pocket on the guitar’s body and push it into place so it lines up with your marks. Press down on the fretboard you applied glue to so it has solid contact with the front of the guitar’s body, and wipe off any excess that comes out from the sides. Hold the neck in place and reattach the bolts inside the guitar by hand. Tighten the bolts with your screwdriver to secure it in place. Don’t use too much force while tightening your bolts since you could damage the guitar’s body.
Clamp the neck to the guitar body so it can dry. Attach a C-clamp to the section of fretboard you glued and secure it to the body of the guitar so it doesn’t move or shift while it’s drying. Wait at least 24 hours for the wood glue to set before removing the clamp so the neck is secured to the guitar’s body. After the glue has set, you can restring your guitar.
Swapping an Electric Guitar Neck
Take the strings off of your guitar. Loosen the strings with the tuning keys at the end of the guitar neck so they don’t have any more tension. Use a string cutter to slice through the strings near the first fret so they come loose and are easy to remove. Unscrew the cover on the back of the guitar’s body to expose the strings and springs so you can pull the ends of the strings out. Then, use a pair of needle-nose pliers to pull the other pieces of guitar string out from the tuning keys. Be careful not to scratch the body of the guitar when you cut the strings since they may be sharp. Don’t cut your strings while they still have tension or else they may spring back and hurt you.
Unscrew the backplate from the guitar neck to remove it. Look for the metal backplate attached to the back of the guitar’s body where it meets the neck. Use a screwdriver to loosen the screws on the backplate to remove them. Once you take the screws out from the backplate, the old neck will pull out from the pocket easily. If you aren’t able to remove the screws with your screwdriver, use a drill with a screwdriver bit instead. Be careful not to strip the screws since you need to use them again.
Dry-fit the new neck into place and clamp it in place. Make sure you get a neck that’s compatible with your type of guitar or else it may not fit into the pocket. Push the new neck into the pocket on the guitar’s body until it fits tightly. Line up the center of the neck with the middle of the body and adjust it until the neck is flush. When you have the guitar neck in position, use a C-clamp to secure it to the body so it doesn’t shift. You can get a new neck for your electric guitar from music supply shops or directly from the manufacturer. Make sure your clamp doesn’t cover the area where you need to reinstall the backplate.
Drill through the back of the neck using the backplate holes as guides. Most new guitar necks don’t have holes drilled in them, so you need to make your own holes. Use a drill bit with a diameter that’s ⁄8 inch (0.32 cm) smaller than your screws. Put the end of the drill bit into the screw holes on the back of the guitar’s body and push the drill straight down into the neck. Blow the excess sawdust out of the hole so it’s clean, and repeat the process for the other 3 holes. If you want to ensure the holes are straight when you make them, you can also use a drill press if you have access to one.Warning: Make sure your drill doesn’t go through the front side of the neck or else it may not be as secure when you attach it.
Reattach the backplate and the screws on the back of the guitar. Set the backplate against the body of the guitar, ensuring that the holes all line up with one another. Feed the screws into the holes and use a screwdriver to tighten them. Tighten the screws in the opposite corners of your backplate so it applies pressure to the neck evenly. Continue turning the screws until they’re flush with the backplate and hold the neck in place. After you secure the backplate to the neck, you can restring your guitar so you can play.
Changing a Neck with a Dovetail Joint
Take the strings off of your guitar. Turn the tuning keys at the end of the guitar neck to remove some of the tension from them so they’re easier to remove. Cut the strings with a string cutting tool near the center hole in the guitar body, and pull out the individual bridge pins, which look like small balls holding the ends of your strings. Once you remove the strings and bridge pins, loosen the tuning keys more and use a pair of needle-nose pliers to pull the rest of the strings out. Don’t try to remove the strings while they still have tension since they could fly up and hurt you once you cut them.
Remove the 13th or 15th fret from the fretboard. Look for the fret that’s closest to the edge of your guitar’s body, which is usually the 13th or 15th fret depending on your guitar. Set the flat edge of the fret cutter on the neck of the guitar and pinch the fret between the tool’s jaws. Squeeze the handles together to break the glue holding it in place so you can pull the fret off. If the fret doesn’t come off after your first cutter, then grab a different section of the fret between the jaws and cut it again.
Drill a hole in the slot where the 13th or 15th fret was on the guitar neck. After you take the fret off, you’ll be able to see a small slot or mark where it used to be attached. Use a drill bit that has a diameter equal to the width of the slot so you don’t make your hole too big. Position the drill bit in the center of the slot and slowly drill a hole straight down into the neck. The hole will allow you to access the pocket and soften the glue holding the neck in place. Be careful not to drill into the body of the guitar since you could damage it.
Heat the fretboard and the drilled hole with steam to loosen the glue. Fill a clothes steamer with water and turn it on so it starts heating up. Direct the steam at the hole you just drilled and the fretboard that extends onto the body of your guitar. Keep spraying steam onto the guitar to heat the glue inside the neck joint and under the fretboard so it will come loose easily. Continue applying steam for about 5 minutes so the glue comes completely undone. You can buy a steamer online or from a home goods store. Wipe off any steam or standing water that’s on your guitar since it could cause damage if it’s left to dry.
Shimmy the old neck out of place once the glue is softened. At the same time as you’re applying the steam, twist the neck from side to side to loosen it from place and separate it from the softened glue. The longer that you apply the steam to the guitar, the easier it should be to move the neck. Once the glue is completely broken, lift the neck straight up and out from the pocket so you don’t cause any damage. Avoid pulling the neck out horizontally from the body of the guitar since the neck has a tapered end that could break the body. Don’t try to force the neck out if the glue hasn’t completely softened, or else you may break pieces of the neck and make it difficult to clean.
Clean and sand out the neck pocket on your guitar. Once you remove the guitar’s neck, there will be some glue and wood residue left inside the pocket. Use 180-grit sandpaper or a sanding block to gently scrape residue that’s left over. Blow out any sawdust so you can see the area you’re working on and stop when you don’t see any more glue or bits of wood.Tip: If pieces of the neck broke off and are stuck inside the pocket, carefully use a chisel to chip the pieces out.
Dry-fit the new neck into the pocket to ensure it’s flush. Order a new neck that fits your brand and style of guitar or else it won’t be compatible with your instrument. Push the new neck into the pocket from above until it’s flush with the body of the guitar. Adjust the neck so the center lines up with the middle of the instrument or else the strings may not lay correctly and make it difficult to play. Make a small mark on the body with a pencil so you know the correct positioning. You can buy guitar necks made from the manufacturer or you can order a custom neck. You may need to sand the base of the new neck so it fits snugly into the pocket.
Apply glue onto the dovetail joint on the new neck. Use a coin-sized dot of wood glue and spread it over the joint at the base of the neck with your fingers or a small paintbrush. Make sure the entire joint has an even application, or else the glue won’t be as strong. Check that there aren’t any large blobs of glue or else they will take longer to dry and won’t set as well. Work quickly after you apply the glue since it can start to dry quickly and make it more difficult to fit in the joint. You can also apply a little glue inside the pocket of the guitar, but you don’t need to.
Slide the neck into the pocket and clamp it in place so it can dry. Position the neck above the pocket on the guitar and push it into place. Make sure the neck lines up with the marks you made earlier or else it won’t set in the right place. Once you have it in position, secure a C-clamp onto the neck and body to hold it in place so it can’t shift around while it’s drying. Leave the guitar for at least 24 hours so the glue can set.
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