How to Fix a Sagging Door on a Classic GM Car: Replace the Hinge Pins and Bushings

Open the driver door on a lot of 50-year-old GM cars and you can feel it happen. The door swings out, drops a quarter inch or so, and then you have to lift it by the armrest and give it a shove to get the latch to catch. Slam it hard enough and it closes, sure. But every one of those slams is chewing up the striker, the latch, the paint on the jamb, and whatever is left of the bushings in the hinges.

That drop is almost always worn hinge pins and bushings. Not a bent hinge, not a body that is falling apart, not a “the frame is shot” situation. It is two little steel pins per door riding in soft bushings that have been rotating every single time somebody got in or out since Nixon was in office. The good news is that a full set of pins and bushings for both doors on most GM cars of this era costs less than a tank of premium, and you can do the work in a Saturday with tools you probably own.

I’m Jay. I started turning wrenches on an ’87 Subaru, and these days I spend way too much time around old Buicks and their GM cousins. I have done this job on Chevelles, a Skylark, a Cutlass that belonged to a buddy, and one full-size Chevy that fought me the entire way. What follows is how to figure out if your sag really is the hinges, how to rebuild them with the door still on the car or off it, and how to get the door hung straight again afterward so the gaps look right and it closes with two fingers.

Most of the specific details here are for GM A-body cars (Chevelle, Malibu, El Camino, Skylark, GTO, Cutlass, and friends) from the middle 1960s into the early 1970s, but the process is close to identical on F-body Camaros and Firebirds, X-body Novas, and the full-size cars. Ford and Mopar hinges are built differently in places, so read along for the method and check the parts for your car.

How to Tell If Your Door Sag Is the Hinges

Before you order anything, prove it. Open the door about halfway, put your hand under the back edge of the door (the latch end), and lift straight up. Don’t yank on it, just lift. If the door moves up and down and you can hear or feel a little clunk at the hinges, the pins and bushings are worn. A good hinge has almost no play at all. You might feel the rubber weatherstrip compress when you push the door in, but you should not be able to raise the latch end of the door.

Here’s a second check that helps. Have a helper lift the back of the door while you watch the hinges from the front of the door opening, down by the kick panel. You will see the hinge halves shift relative to each other at the pin. Upper or lower, sometimes both. On most cars the upper hinge goes first because it is carrying more of the load as the door wants to pivot down and out.

Things that look like hinge sag but are not:

• A loose hinge-to-body or hinge-to-door bolt. Grab the hinge itself and try to wiggle it against the body. If the whole hinge shifts, snug the bolts before you go any further.
• A worn or mispositioned striker. If the door has no play when you lift it but still drags on the striker, the striker may just need adjusting.
• A broken detent roller or spring. The door will swing loose and not hold open, but it will not sag. That is a separate repair, though you’ll usually do it at the same time.
• Rust in the hinge pillar or the door shell. On a rusty car, look hard at the metal around the hinge mounting points. If the pillar is cracked or the door’s inner skin is rotted where the hinge bolts on, new pins won’t fix it. That’s a sheet metal job first.

If you can lift the door and feel the slop, you’re in the right place.

What Actually Wears Out in a GM Door Hinge

A typical GM hinge from this period is two stamped or forged halves, one bolted to the body and one bolted to the door, joined by a single steel pin. The pin rides in two bushings pressed into one half of the hinge. One bushing up top, one down below. So each hinge is one pin and two bushings, and a door is two hinges. That means one door takes two pins and four bushings, and both doors on a two-door car take four pins and eight bushings.

The pins have a knurled or serrated section just under the head. That serration bites into the hinge half it’s pressed into so that piece doesn’t spin on the pin. The other hinge half rotates on the pin through the bushings. When the bushings wear thin, or crack and fall out in pieces, the pin is suddenly flopping around in a hole that is way too big. That is your sag.

The lower hinge on most of these cars also has the door check, which is a roller on a small pin that rides against a cam on the other half of the hinge, plus a heavy coil spring that pushes it there. That’s what gives the door the “click” stops when you open it. The spring is the part of this job that can hurt you, and we’ll get to it.

One thing that trips people up: many GM hinges use one bushing that is bigger than the others. Speedway Motors notes that many GM cars use a larger bushing in the lower hole of the upper hinge, and their kit includes it. On a Team Chevelle how-to, a fellow doing a ’71 Malibu convertible found his kit came with eight small bushings and two larger serrated ones, and then found his particular car needed more of the large serrated bushings in the upper hinge than the kit supplied. Sometimes the factory size bushing just falls into a hole that has been wallowed out by years of a loose pin. Plan for that by buying a couple of extra oversize bushings. They are cheap.

Parts and Tools

Parts

For a GM A-body from 1968 to 1972, the aftermarket kits typically come as four pins and eight bushings. YearOne lists their 1968 to 1972 Chevelle, Monte Carlo and El Camino hinge kit as four pins and eight bushings to repair all four hinges, which is both doors. Some other sellers word it as one kit per door, so read the listing carefully and count the pieces before you check out. You want two pins and four bushings per door, plus a spare oversize bushing or two.

Here’s what I’d have on the bench:

• Hinge pin and bushing kit for your car, with the correct mix of standard and oversize bushings.
• A new detent roller and pin if yours is flat-spotted, cracked or seized. Inspect it before ordering if you can.
• A new hinge spring if the old one is rusted, or if you’re nervous about reusing it.
• Penetrating oil. Kroil, PB Blaster, or a mix of ATF and acetone if that’s your thing.
• White lithium grease or a good chassis grease for the pins.

Tools

• A GM door hinge spring tool. These are cheap. AutoZone lists the OEMTOOLS 25336 door spring tool for GM cars and light trucks for about $15, and it works with a 1/2-inch open end or ratcheting box wrench. TP Tools sells a Titan version for under $10. CTA makes one too. Buy one. Seriously.
• A floor jack and a piece of 2×4 or a folded shop towel to support the door from underneath.
• A 3-pound hammer, a good set of punches, and a pin punch close to the pin diameter.
• A C-clamp, 4 inch or 6 inch, or a bench vise if you pull the hinges off.
• Sockets. On a lot of these GM doors the hinge-to-door bolts take a 1/2-inch socket, with a box wrench for the ones you can’t swing a ratchet on.
• Safety glasses. Not optional for the spring.
• A paint marker or a can of primer to mark the hinge locations.
• A cutoff wheel or grinder in case a pin end is mushroomed and won’t come through.
• A helper, if you take the door off. Doors are heavy and awkward.

On the Car or Off the Car?

You have two ways to do this, and people who have done it many times argue about which is better.

Leave the door and hinges on the car. You support the door with a jack, compress and pull the spring, then knock out one pin at a time, replace the bushings in place, and drive in a new pin before you move to the other hinge. The big advantage is you never move the hinge-to-body bolts, which set the door’s position in the opening. If you don’t touch those, the door goes right back where it was, just without the sag. The downside is you’re working in a cramped space, often on your knees, and pressing bushings in place with a C-clamp is fiddly.

Take the door off, then the hinges. Mark everything, pull the door with a helper, unbolt the hinges, and rebuild them on the bench in a vise. Way easier to work on. Much easier to do the detent roller. Also the right way to go if you’re restoring the car and want to clean and paint the hinges. The cost is that you’ll have to re-hang the door and set all the gaps from scratch, which takes patience.

On a driver that just needs the sag gone, I do it on the car, one hinge at a time. On a car that’s getting paint or a full restoration, I take everything apart. If this is your first time and the car is a nice driver, start on the car. You can always pull it apart later if a pin fights you too much.

Step by Step: Rebuilding the Hinges With the Door on the Car

1. Measure and mark before you touch anything

Close the door and look at the gaps. Front edge to fender, back edge to quarter panel, top edge to the roof or the window frame, bottom edge to the rocker. Take a few pictures. Write down anything that looks off. If the door already sat a little low at the back before you started, you want to know that, because new pins won’t magically fix a door that was hung crooked by someone else 30 years ago.

Then mark around both hinges on the body and on the door with a paint marker. Even if you don’t plan to loosen any bolts, this is cheap insurance. A Team Chevelle member suggested tracing the outline of the hinges and recording the gaps before you start, and that’s the advice I’d give anyone.

2. Roll the window down and support the door

Roll the window all the way down so you don’t crack the glass if something shifts. Open the door most of the way, slide the floor jack under the bottom of the door, and put a 2×4 or a thick folded towel between the jack pad and the door so you don’t dent the bottom lip. Jack it up just until it takes the weight. Don’t lift the door, just support it. If you lift too hard you’ll bind the pins and they won’t come out.

3. Remove the hinge spring

This is the one part that can actually hurt you. The spring on the lower hinge is under real load. If it lets go it can take an eye out or put a hole in the drywall across the shop.

The GM spring tool is a little bar with a threaded rod that hooks the coils and squeezes the spring down shorter. You hook it over the spring, crank it down with a 1/2-inch wrench until the spring is loose in its pockets, then lift the compressed spring and tool out together. Some old-timers put the spring in the tool, compress it, and then wrap a piece of mechanics wire around the coils so it stays compressed, then take the tool back off. That makes reinstalling easier. I like that trick.

People also pry springs out with a big screwdriver. I’ve seen it work. I’ve also seen a spring disappear into a field and never come back. For $10 to $15, buy the tool.

Wear the glasses.

4. Drive out the old upper pin

Start with the upper hinge. Soak the pin with penetrating oil, ideally the night before. Look at both ends of the pin. One end has the head with the serrations under it, and the other end may be peened or mushroomed over a little. If the end is mushroomed, grind it flush so it will pass through the hinge.

Then drive the pin out from the bottom end toward the head, or from the pointed end back out the head side, depending on how it was installed. Use a punch that is just a little smaller than the pin. On some cars the factory installed the upper pin pointing down and the lower pin pointing up. Speedway Motors points this out in their write-up, along with the observation that both pins facing down tends to keep them from working loose. If you’re doing a show car and care about factory correct details, put them back the way they came.

If the pin won’t move, don’t keep beating on it. Add heat. A propane torch is usually enough. An oxy acetylene torch is quicker, and that’s what Hemmings used when they rebuilt the hinges on a 1961 Impala and the detent roller pin wouldn’t budge. Heat the hinge around the pin, not the pin itself, and you’ll often hear it crack loose on the next hit.

If it still won’t come, cut it. A cutoff wheel between the hinge halves will separate the pin, and then you can drive out the two pieces. Be careful not to cut into the hinge.

5. Get the old bushings out

Once the pin is out, look at the bushings. They might be sitting there worn thin and egg shaped. Very often they’re cracked into pieces or already gone. Knock out what’s left with a punch. Hemmings needed nothing more than a 3/32-inch punch and a hammer for one bushing, but the other one fought them, so they ground the head of an old hinge pin down to make a driver that would push the bushing out without slipping through. That’s a handy trick, and you’ll have old pins to spare.

Clean the hole. A round file, a bit of sandpaper rolled into a tube, whatever gets the rust and junk out. Check the hole size. If the new bushing slides in with no resistance at all, the hole is worn and you need the oversize bushing.

6. Press in the new bushings

Lightly grease the outside of the new bushing and line it up square with the hole. Use the C-clamp with a socket on each side to press it in. The flange of the bushing goes on the outside of the hinge.

Two warnings here:

• Bushings are soft. They’re designed to wear instead of the pin and hinge. If you keep cranking the C-clamp after the bushing is seated, you’ll flatten the flange or split it. Hemmings made a point of that, and they’re right. Seat it and stop.
• Larger bushings stick through further. Speedway notes that when pressing in the larger bushing, use a socket over the side without the flange, because the larger bushing sticks through the hinge more than the small one does. If you press it flat against the clamp jaw, you’ll crush it. They’ve had to fix customer hinges because of exactly that.

7. Install the new pin

Grease the new pin, line up the hinge halves, and slide the pin through. If it won’t go through by hand, the hinge halves aren’t lined up or the bushings are a little out of round from pressing. Don’t hammer it through. A forum guy on Team Chevelle used an adjustable wrench to tweak the hinge halves until the pin slid through by hand, and if the pin still wouldn’t go, a piece of emery cloth rolled up and spun in a drill made a quick reamer for the bushing. Take a little at a time. You want it snug, not loose.

Once it’s through, the serrated section under the head needs to be seated into the hinge. Use the C-clamp, with a deep socket over the pointy end of the pin and on the head. Squeeze until the head is down tight. That serration is what keeps the pin from rotating and walking out.

8. Repeat on the lower hinge

Now do the same on the lower hinge. Do one hinge at a time, so the door is always held in place by at least one good pin.

While you’re there, look at the detent roller. If it’s flat on one side, cracked, or won’t spin, replace it. On the Impala job Hemmings needed heat to get the roller pin out, then used a C-clamp to install the new roller and pin, checking that it still spun before going further. If you squeeze the pin too far, the roller binds against the hinge. Grease it and make sure it spins freely.

One thing to double check on Chevelles: a Team Chevelle owner warned that 1966 and 1967 lower hinges look very similar but are a little different. On the ’66, the detent roller sits almost against the cowl support, while on the ’67 it sits about 3/8 to 1/2 inch away. If you buy replacement lower hinges instead of rebuilding, look closely at what you’re getting.

9. Reinstall the spring

Put the spring back in the tool (or leave it wired if you used the wire trick), compress it, set it into its pockets on the hinge with the door partway open, and slowly back off the tool. If you used wire, set it in place and cut the wire with the door supported and your face out of the way.

10. Lower the jack and test

Lower the jack and lift on the back of the door. It should be solid. No clunk. Swing the door all the way open and closed a few times and listen. Then close it slowly and see how it meets the striker. If the door was sagging for years, someone may have moved the striker down to make it latch. Now it’ll be in the wrong spot. Adjust the striker so the door latches without lifting or dropping as it closes.

Rebuilding Off the Car: What’s Different

If you pull the door, you need a helper, period. A Team Chevelle member who documented the job on his ’71 Malibu convertible supported the door with a floor jack and a 2×4, marked the hinges with primer, and removed the hinge-to-door bolts (three per hinge, 1/2-inch socket) with a helper holding the door steady. He took the inner bolts out with a wrench first, then the outer bolts with the ratchet, lower before upper, so the door didn’t twist and fall off the jack. Then he rolled the door away on the jack and set it somewhere safe so he didn’t knock it over.

That’s good advice. Put the door on a blanket, upholstered side down, somewhere you won’t bump into it.

With the hinges off the car, the work is the same but easier. You can put the hinge in a vise to compress and release the spring. Wear eye protection. A Team Chevelle member mentioned that the spring can be removed easily by putting it in a vise. True, but it’s still a loaded spring, so wrap it with a rag and keep your face out of line with it.

Pressing bushings and pins in a vise is much more controlled than doing it with a C-clamp on your knees under a door.

When the Hole Is Worn Too Big

Sometimes you’ll find the bushing hole worn so big that even the oversize bushing is loose. You have three choices:

• Drill the hole out and use a larger bushing. Some guys order extra oversize knurled bushings and drill the hinge holes slightly bigger to fit them. It works if you’re careful to keep the holes in line.
• Glue the bushing in. A Team Chevelle tip: if the hole is wallowed out and too big for the bushing, JB Weld the new bushing in, using the pin to hold it straight while it cures. Grease the pin first so it doesn’t get glued in too. I wouldn’t do this on a car that gets driven hard every day, but on a weekend cruiser it holds up fine.
• Replace the hinge. Reproduction hinges are out there for most popular GM cars. They’re not always as good as the originals. Look at the quality and fit before you install them.

There are also shops that rebuild original hinges. If you’re restoring a car where originality matters, sending the hinges out may be worth the cost.

Re-Hanging the Door and Setting Gaps

If you took the door off, here’s where the patience comes in. If you left the door on the car and didn’t loosen any hinge bolts, you can skip most of this.

1. Pull the striker first. Take the striker off the door jamb before you start adjusting. That way the door isn’t being pulled into position by the latch while you’re trying to set the gaps. A Team Chevelle owner suggested doing all adjustments with the striker removed, and that’s how I do it too.

2. Bolt the hinges back on the body to your marks. The hinge-to-body bolts set the fore and aft position of the door and the height. Get the hinges close to your marks and snug, not tight.

3. Hang the door with a helper. Use the jack and 2×4 to bring the door up to the hinges, start all the bolts by hand, and snug them.

4. Set the front gap and the height first. Close the door gently, with the window down. Look at the front gap at the fender and the rear gap at the quarter. Look at the top and bottom edges. Adjust the hinge-to-body bolts to move the door fore and aft and up and down until the gaps are even.

5. Set in and out. The hinge-to-door bolts let you move the door in or out toward the center of the car. That changes how the door’s curve lines up with the fender and quarter panel. Moving the top of the door in kicks the bottom out, and the other way around.

6. Check the glass. On a hardtop, roll the window up and close the door slowly the first time. The glass needs to seal against the weatherstrip without being crushed. You may need to adjust the door a little or adjust the glass itself.

7. Put the striker back on and adjust it. Install the striker and adjust it so the door latches smoothly without being pulled up, down, in, or out when it closes.

8. Tighten everything. When it’s right, tighten the bolts and check again. Then drive the car and check again in a few days, because things can settle.

Adjusting a door takes several tries. Move one thing at a time, close the door gently, and look. If the hinge-to-body bolts are seized, you may need to remove the kick panel vent and soak them for a while.

How Long It Takes and What It Costs

On the car, one door: plan on two to four hours the first time, depending on how stubborn the pins are. Both doors: a Saturday. Off the car with re-hanging: easily a full weekend, more if you’re cleaning and painting.

Cost: a pin and bushing kit for most GM A-bodies runs about $30 to $40 for both doors. YearOne had their 1968 to 1972 Chevelle kit at about $37. The Hemmings Impala job used a full-size Chevy kit from Shafer’s Classic Reproductions for $28, and that one included the detent pin, roller, and spring. A spring tool is $10 to $15. Rollers and springs, if you need them, are a few bucks to maybe $25. Compare that to new reproduction hinges, which a Team Chevelle member priced at around $80 each.

Common Mistakes

• Not supporting the door. A door that drops when the pin comes out can bend a hinge or crack the paint. Use the jack.
• Doing both hinges at once with the door on. Always keep one good pin in place.
• Crushing a bushing. Seat it, stop squeezing.
• Forgetting the oversize bushing. If your kit didn’t include one and the hole needs it, you’ll be stuck with a car apart. Buy extra.
• Forcing the pin. If it won’t slide through, check alignment and ream the bushing lightly. Hammering a pin through a misaligned hinge just makes a new problem.
• Not adjusting the striker. A sagging door often means the striker was moved to compensate. Fix the striker after fixing the hinges, or the door still won’t close right.
• Skipping the eye protection. That spring.

A Few Words From the Garage

The first time I did this job, it was on a friend’s Skylark that had been parked under a tree for more years than either of us wanted to admit. The driver door was so worn he’d gotten in the habit of lifting it with his knee as he shut it. He didn’t even know he was doing it anymore. We spent a whole Saturday afternoon on that one door, mostly because the upper pin had rusted solid and needed heat and a cutoff wheel before it gave up. But when we were done and he closed the door with two fingers, he just stood there and opened and closed it about six times, grinning.

That’s what this job is. It’s not glamorous like a cam swap or a fresh coat of paint, but you notice it every single time you get in the car. A door that closes with a solid, quiet click makes an old car feel tight again. And it saves your striker, latch, and jamb paint from slow death by slamming.

If you’re chasing other wear on an A-body, I wrote up how to replace the upper control arm bushings on a Chevelle or other GM A-body and how to replace rear drum brake shoes on a classic GM A-body. If your car is headed for paint, do the hinges before the body work, because getting the door gaps right is part of getting the panels straight. Our guide on 1970s muscle car paint restoration covers more of that. And if you’re putting together a full restoration plan, see restoring a rare muscle car in a practical order.

FAQ

Can I fix a sagging door without taking it off the car?

Yes. On most GM cars of this era you can support the door with a floor jack, remove the spring, and replace one pin and its bushings at a time while the door stays bolted on. The door goes back in the same spot because you never loosen the hinge-to-body bolts.

How do I know if I need oversize bushings?

If the new standard bushing slides into the hinge hole with no resistance, or the old bushing was missing entirely and the hole looks oval, you need the oversize bushing. Many GM hinges use a larger bushing in one hole from the factory. Which hole varies by car, so check the kit’s instructions and your old parts.

Do I need the special spring tool?

You don’t strictly need it, but it’s the safest way. The tool costs $10 to $15 and lets you compress the spring so it comes out under control. Prying the spring out with a screwdriver can work, but if it slips, the spring can fly and hurt you.

Which way should the hinge pins point?

From the factory, many GM cars had the upper pin pointing down and the lower pin pointing up. For a concours restoration, match that. For a driver, putting both pins pointing down can help keep them from working loose over time.

Why does my door still not close right after new pins and bushings?

Most of the time it’s the striker. If the door sagged for years, someone may have lowered the striker so the door would latch. With the sag fixed, the striker needs to go back up. Adjust it until the door closes without being lifted or dropped as it latches.

Sources

• Hemmings, how to rebuild a worn-out car door hinge (1961 Impala)
• Speedway Motors, how to replace door hinge pins and bushings
• Team Chevelle, how to repair door hinges (’71 Malibu convertible)
• Team Chevelle, door pin replacement (1966 vs 1967 lower hinges)
• Team Chevelle, door hinges need rebuilt? (oversize bushings, reaming, JB Weld)
• Team Chevelle, door hinge rebuilding
• YearOne, 1968-72 Chevelle, Monte Carlo and El Camino door hinge repair kit
• AutoZone, OEMTOOLS 25336 GM door spring tool
• TP Tools, Titan GM door spring tool

For more maintenance and repair guides, see the Car Maintenance Hub.

Featured image: 1967 Pontiac Firebird interior with the door open, photo by Eric Friedebach via Wikimedia Commons (CC BY 2.0). Inline images via Wikimedia Commons: Sicnag (CC BY 2.0), Vetatur Fumare (CC BY-SA 2.0), Bff (CC BY-SA 3.0), and Les Chatfield (CC BY 2.0).

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