Repairing Guides

how to repair rear bumper crack

by Donny Corkery Published 2 years ago Updated 1 year ago
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For fixing a cracked bumper, flatten the bumper weld with sandpaper. At this point, the plastic seems to be unsightly. Start with 120 grit paper, then move to 220, 300, and finally to 500 grit. Fill in any spaces or bumps with a light coat of filler if necessary to preserve the initial contours.

Part of a video titled DIY Bumper Crack Repair - YouTube
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I'm going to take a little bit of 40 grit sandpaper. And rough up the area around the crack. AndMoreI'm going to take a little bit of 40 grit sandpaper. And rough up the area around the crack. And next we can use a little bit of acetone or alcohol to clean the crack both on the inside.

Full Answer

How do you repair a cracked car bumper?

Part 2 of 2: Repair a cracked bumper

  • ¼ inch burrowing tool
  • Air compressor suitable for tool usage (you will only need an air compressor if you are using air powered tools)
  • Angle grinder
  • Body filler such as Bondo
  • Drill or dremel to fit burrowing tool
  • Dust mask
  • Jack
  • Jack stands
  • Masking paper or newspaper
  • Paint brush

More items...

How to fix a cracked plastic bumper?

you are correct, take a 40watt soldering iron and have at it, I've fixed many a broken bumper this way, its just plastic welding, first melt the cracked area together with a fine tip, making sure you get good penetration so the material on either side bonds together, then either shave some material from the bottom or somewhere inconspicuous and use them as a filler rod. harbor freight also sells filler rod and a plastic welder, though i have heard mixed results about it

How much does it cost to fix a bumper Dent?

Whatever the case, now you’ve got a dent on your bumper and you’re wondering how much does a bumper repair cost? Well, a bumper repair will typically cost between $500 – $2,000. However, there will be other factors as well that might affect your total bill. If the damage is minor, then your repair bill might not even reach $500.

How do you remove scratches from a plastic bumper?

  • 80 and 40-grit sandpaper for stripping.
  • 500 and 600-grit sandpaper for finishing.
  • Rubbing alcohol, and abrasive cleaner or stripper.
  • Utility blades.
  • Black Body filler (for deep scratches.)
  • High-quality black bumper polish.
  • Polishing rags (microfiber works best.)

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Can you fix a cracked plastic bumper?

Nearly every cracked plastic bumper can be repaired, and usually for less than half the cost of a new bumper. While almost every cracked bumper can be repaired, it isn't always practical. A plastic bumper crack repair job requires a special plastic welding technique plus the application of structural adhesives.

How do you fix a cracked bumper?

How to Fix a Cracked Plastic BumperStep 1: Clean the Bumper. Examine the damaged area thoroughly using a knife or razor, gently cut any shards of plastic that may be present. ... Step 2: Remove the Bumper. ... Step 3: Align The Bumper Cracks. ... Step 4: Weld the Bumper Crack. ... Step 5: Sand the Bumper. ... Step 6: Paint and Wax the Bumper.

How much does it cost to fix a rear bumper crack?

The exact cost to repair your rear bumper depends on the extent of the damage and what kind of car you own. In general, most people should expect to spend between $225 and $750. But if you need to replace the rear bumper, then you could end up paying up to $2,000.

How do you repair a plastic rear bumper?

0:583:13Proper Repair of Crack or Tear on Plastic Bumper Products - YouTubeYouTubeStart of suggested clipEnd of suggested clipUse a DA with P 80 grit to rough up the backside for the reinforcement repair blow off the repairMoreUse a DA with P 80 grit to rough up the backside for the reinforcement repair blow off the repair with clean dry air and apply a light coat of adhesion. Promoter. Allow ten minutes of drying time.

How can I fix my bumper myself?

2:5516:22DIY Bumper Repair - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow we have a little bit of a high spot still so we're going to use some heat and push it down weMoreNow we have a little bit of a high spot still so we're going to use some heat and push it down we don't want to grind away all the plastic. We just want to make sure we have a level surface.

Can you repair bumper without replacing?

If the bumper on the car is cracked, it typically needs to be replaced, rather than repaired. There are a few exceptions to this, as epoxy and a fiberglass repair kit can be used to repair a bumper. But, for the most part, you want to have it replaced.

Is it cheaper to repair or replace a bumper?

Bumper repair can be performed in-shop and is often cheaper than bumper replacement. Bumper repair normally costs between $100 and $1,000.

How much money is it to replace a back bumper?

Bumper Replacement Costs According to Cost Helper, a new bumper for a passenger car can cost anywhere between $100 and $1,000. Installation and painting the new bumper can cost between $200 and $600. Bumpers for pickup trucks, SUVs and luxury vehicles will have higher costs.

How do you fix a crack in plastic?

Our favourite is Loctite Super Glue All Plastics. This specialty super glue is designed for plastics, including the hard-to-bond-to polypropylene and polyethylene. It comes with an activator which you apply first and need to allow to dry for 60 seconds.

Can a plastic rear bumper be repaired?

Many plastic bumper parts can be repaired, especially bumper covers, which are commonly damaged on a vehicle. By saving your bumper, the technician will also be able to blend the appended paint more efficiently and accurately.

Can I use body filler on plastic bumper?

Body filler and glaze is not meant to flex the way that plastic does, therefore the material would crack. Plastic repair materials should be used when performing repairs on bumper covers. These materials or adhesives, are two-part epoxies, urethanes, or acrylics.

Can I use JB Weld on my bumper?

1:046:47How To Repair A Torn Bumper Cover, Review JB Weld Plastic BonderYouTubeStart of suggested clipEnd of suggested clipThis is a material that I use the jb weld plastic Bhandar. And if you take a look at. It. There youMoreThis is a material that I use the jb weld plastic Bhandar. And if you take a look at. It. There you go so it's body panel adhesive. So this is the really really good stuff for plastic.

Can I use body filler on plastic bumper?

Body filler and glaze is not meant to flex the way that plastic does, therefore the material would crack. Plastic repair materials should be used when performing repairs on bumper covers. These materials or adhesives, are two-part epoxies, urethanes, or acrylics.

How do I fix my cracked Xbox One bumper?

5:366:46XBOX One Controller Lb Rb Bumper REPAIR - YouTubeYouTubeStart of suggested clipEnd of suggested clipFirst put the middle screw. And then grab the rest of the screws. And place them right on the sides.MoreFirst put the middle screw. And then grab the rest of the screws. And place them right on the sides. And i'm going to show you guys how to put the side panels.

Will a cracked bumper fail an MOT?

For example, if your bumper is only lightly scratched or dented, it's unlikely your car will fail its MOT. But if it is detached, that will be classed as a dangerous defect and if it is insecure or has suffered damage which could cause injury when contacted, that will go down as a major fault.

Step 2: Sanding

Next, use a dremel tool to carve a V shaped groove in the back of the bumper along the crack. This is to give the adhesive some more surface area to stick on. Then sand the area around the crack for better adhesion.

Step 3: Apply Epoxy

A clamp was applied at the top of the crack to prevent it from separating.

Step 4: Fill in the Crack

Once the epoxy has dried overnight and cured, the tape and supporting clamps can be removed.

Step 5: Prime and Paint the Bumper

The sanded area of the bumper was then primed with two light coats of primer. It was then wet sanded using 400 grit sand paper and soap water.

Step 6: Reinstall the Bumper

Once the paint has cured and can be handled, the bumper can then be reinstalled on the vehicle.

The Safety Brief

Safety comes first. We want you to get this job done in one piece. This job requires some grinding, sanding, spray painting, and mixing epoxy. To ensure your skin remains unblemished and intact, you’ll want to make sure you wear gloves, safety goggles and EHS/PPE rated dust masks. On top of that, you’ll want to work in a well-ventilated area.

The Tools & Parts You Need

Don’t get stuck in the middle of a job without the parts you need. Gather everything required for the job before you start.

FAQs About Fixing a Cracked Bumper

We can’t read your mind, but we want to try to answer any questions you have before you start the job. We’ve selected common points of confusion from our experience, as well as commonly asked questions from popular search results. We answered those questions below.

Learn More From This Helpful Video Tutorial

Car Bibles editors understand that not everyone is a text-based learner. For those kinesthetic people out there, we have your back with a video showing you exactly how to fix your cracked bumper. We pulled it from one of our favorite, most trusted sources and it’s a great additional resource.

How to weld a platic bumper?

Remove your cracked bumper - This is a picture of our cracked bumper. This is a small crack. With this method, you can repair much larger bumper cracks. We strongly recommend that you remove the bumper to repair the crack. Or at least partially remove it. Bumpers may seem hard to remove, but they are not.

Where to order a custom mixed spray paint can?

We found several listings on eBay that will ship you mixed custom car paint .

Can a cracked car bumper be repaired?

Yes, a cracked car bumper can be repaired. You can use a plastic weld method or epoxy glue. Our favorite method is to use the plastic welding method.

What's the best epoxy glue for a cracked bumper?

If you insist, you can use a 3M Bondo 280 Epoxy Bumper Repair Syringe on the inside in combination with a mesh. On the outside, you will have to use Bondo. We still think plastic weld is easier and cheaper. But hey, it's your bumper.

How much does it cost to repair a cracked bumper?

If an auto body shop repairs your cracked bumper, expect to pay between $350 and $600. The cost to fix a cracked bumper will depend on two things. How severe the crack is. What kind of paint your car has. Car paint is so expensive nowadays. Certain metallic car paint colors are even more expensive.

I cracked my bumper. Should I repair or replace it?

Small bumper cracks can be easily repaired. You don't need to replace the bumper if you got a crack on the lower lip. Take your car to a body shop, and they can fix your bumper without replacing it. If your bumper is cracked in multiple places, you may want to replace the bumper.

Cracked bumper from a hit and run. What should I do?

Well, first, see if there are any cameras where your car was parked that may have recorded the event. If you can find the car's license plate that hit your car, you can file a claim with their insurance policy and a police report, and your bumper will be fixed for free by the other person's insurance.

How much does it cost to buff out scratches on a car?

Any auto body shop or detailing center can buff out scratches for you, and this often works well. Costs typically vary from $50 to $200.

Can you replace bumpers with a pre-painted cover?

Sounds simple, but there are three challenges you need to know about. Replacement bumper covers aren’t cheap, especially if you go with a cover made by the original equipment manufacturer (OEM) and factory pre-painted to match your vehicle.

Can you damage a bumper?

First, there should be no damage to the underlying metal bumper structure. If damage to the cover is small, then patching with conventional, catalyzed auto body compound is an option. That should even work on a big puncture localized in one place.

Do bumper covers need to be stabilized?

The second thing: Bumper covers need to be stabilized before they can be patched, sanded and made to look like new. Bumper covers are flexible enough to bend inwards when you push them. If movement like that happens after patching, it will cause the auto body filler to crack and fall out.

Can you fill the bumper cover with foam?

Filling the area behind the bumper cover with foam in one go will cause too much pressure and an outward bulging of the plastic. Painting and buffing are the final steps to complete a bumper patching job. Originally Published: March 27, 2020.

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