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How To Fix A Cracked Radiator Plastic

If you’re like most people, your car is one big source of joy. It’s a place where you can go to escape the cold, or to take care of business. But sometimes, not everything goes as planned. Maybe your car breaks down, and you have to call a tow truck to take it away. Or maybe your radiator bursts into flames. In any case, if your car has a busted radiator plastic, you’ll need to fix it as soon as possible. Here are some tips on how to do just that.

Identification of the Issue

The issue:

Your radiator may have a crack in it that is causing leaks. This can be a major problem because not only is the water staying inside the car, but it’s also creating anoxic conditions that can damage your engine. There are a few things you can do to try and fix the issue:

1. Repair the crack if possible. If the crack is small, you may be able to seal it with a hot glue gun or some other adhesive. If the crack is larger, then you’ll need to replace the radiator.

2. Replace the radiator if it’s damaged beyond repair. Not only will this stop the leaks, but it will also protect your engine from damage.

3. Add insulation around the radiator to help keep heat in during cold weather conditions.

Removal of the Damaged Part

If you have a cracked radiator plastic, it is important to take care of the repair as soon as possible. The longer the crack remains, the more likely it is that the entire radiator will need to be replaced. Here are four easy steps to take in order to repair a radiator plastic:

1. Clean and dry the area around the crack. This will help prevent water from getting trapped and leading to further damage.

2. Use a metal ruler or a straight edge to create a line down the center of the crack. This will help with precision when applying sealant or adhesive later on.

3. Apply adhesive or sealant along both sides of the line you just created. Make sure to press down firmly so that the adhesive or sealant covers all of the cracks in the plastic surface.

4. Let the adhesive or sealant set for at least 30 minutes before proceeding with any further steps.

Cleaning and Repair of the Radiator

A cracked radiator can be a major annoyance and cause a lot of trouble. It’s important to get it fixed as soon as possible so you don’t have to deal with the heat being trapped inside the engine. Here are some tips on how to clean and repair a cracked radiator plastic:

To clean the radiator, start by removing any excess debris with a vacuum cleaner. Once everything has been cleaned off, use a degreaser to remove any residual grease or oil. Make sure to rinse off the degreaser thoroughly before moving on to the next step.

Next, dry the radiator thoroughly using a hair dryer on low heat. This will help prevent water from seeping through the cracks and ruining your engine. once the radiator is completely dry, apply a layer of sealant around each crack using a brush or spray bottle. Make sure to evenly coat each crack and allow the sealant to cure for at least 24 hours before installing your radiators back in your car.


If you’re experiencing a cracked radiator plastic, there are a few things you can do to try and fix it. Some people recommend using hot water and soap to clean the crack and then filling the crack with resin; while this is an effective repair, it’s not always easy or affordable to do. Others recommend using a metal patch that can be glued into place; again, this is an option that may be less than ideal depending on the location of the crack. If you don’t have access to any of these options or if they aren’t desirable for some reason, you may want to consider having the radiator replaced entirely.