Car Bumpers, Functions And How to Repair

A dented bumper makes the vehicle look ugly. Apart from body repair shops, it turns out that a dented bumper can be repaired by yourself.

Caring for a car is not only about the engine, but also the body, including the bumper. Bumpers that are on the front and back of the car are often the part that does not escape from abrasions and even dents.

A dented bumper makes the vehicle look ugly. Apart from body repair shops, it turns out that a dented bumper can be repaired by yourself. But, let’s get to know what a car bumper is, along with the functions of the materials it contains.

What is a Car Bumper?

A car bumper is a car component that has hinges or is built in. It is located at the front or rear of the car.

The shape and place of installation of the car bumper depends on the design of the car manufacturer, but in general this design will support the shape of the car body to be more complete and emphasize the exterior appearance of the car to make it more stylish and elegant.

In the past, car bumpers have not become a mandatory component that must be in a car. At the beginning of its presence, the car’s bumper was still made of thick steel pieces that were rigid and mounted on the front of the car only. In terms of safety, the bumper is still not too strong as a shock absorber because it only uses bolts and spring hangers.

It’s different with the bumpers of today’s cars which are designed to be more modern and stronger because they have guaranteed hardiness.

Car Bumper Function

The main function of the car bumper is to protect the body, frame, and engine of the car in the event of a collision. Therefore, at the beginning of its appearance the car bumper was only on the front of the car.

Because, logically when a collision occurs, it is the front that will hit first and have a significant impact as a collision barrier.

However, the potential for collisions at the rear of the car is higher, so some cars are also equipped with a rear bumper.

As a collision barrier, it can be said that the car bumper protects the engine or car fuel tank to minimize damage when a collision occurs.

In addition to protecting car components, car bumpers also protect the driver and passengers in the event of a collision besides the seat belt.

In the past, car bumpers were still rigid and made of steel, now there are many types of materials for making car bumpers that are safe but can add aesthetic value to the appearance of the car.

Car Bumper Materials

Considering the function of car bumpers is increasing, namely as car accessories to emphasize the appearance and identity of the car brand, the material for making car bumpers can use plastic and fiber materials.

Car bumpers made of plastic or fiber also reduce the weight of the vehicle so that fuel consumption will be much more efficient. Here are the materials for making car bumpers.

Polypropylene (PP) is the most widely used synthetic plastic in car bumper manufacturers. This type is rugged and the most resistant to various types of chemicals as well as environmentally friendly.

2. Polyvinyl Chloride (PVC)
Polyvinyl chloride (PVC) is one of the thermoplastics that has flexibility against hot and cold temperatures.

3.Polystyrene (PS)
Polystyrene (PS) is a polymer with the monomer styrene, a liquid hydrocarbon made commercially from petroleum. At room temperature, polystyrene is usually a solid thermoplastic and can melt at higher temperatures. Pure solid polystyrene is a hard, colorless plastic and has the flexibility that it can be shaped in a variety of ways

4.Thermoplastic polyurethane (TPU)
This type has the characteristics of being elastic, transparent and resistant to low temperatures without changing shape.

It is one of the easiest types of plastic to mold and mold. The advantages of this material also tend to be heat resistant.

6.Polybutylene rephthalare (PBT)
This material is classified as one of the thermoplastics used as a conductor in the electrical, electronics and automotive industries. The advantage of this material is heat resistance.

7. Polyxymethylene (POM)
POM has stiffness and tends to be stable at low temperatures.

How to fix a dented bumper

The bumper is dented with minimal damage, although it doesn’t really affect function, it does interfere with the beauty of the vehicle. If the dent is only small, it can be repaired by yourself. No need to go to the workshop. Here’s how to fix a dented bumper yourself.

1. Using hot water
A dented car bumper can be repaired with hot water. The trick, the dented part of the car is poured slowly with hot water. Because, basically hot water will make the plastic fiber material soft and can return to its basic shape. Although there is no guarantee the shape will return to its original state.

2. Using a hair dryer
Apart from using hot water, some people also think that repairing the bumper can be done using a hair dryer. The heat released by the hair dryer is believed to be able to overcome the dent bumper.

The trick, heat the bumper with a hair dryer. If it’s hot and slightly melted, immediately push it gently so that it returns to its original shape.

3. Using a rubber mallet
A rubber mallet can also be a tool to repair a dented bumper. The trick, just by tapping the dented part until it returns to its original position. But you have to be careful and do it slowly.

4. Using a heater gun
The next way to deal with a dented bumper is to use a tool called a heater gun. Proper repair of dented bumpers can be done using this tool in hot temperatures around 150 degrees Celsius.

This is done in line with the body on dolly repair method so that the bumper surface can achieve maximum results.

Even so, it’s better to repair the car bumper directly at the body repair shop so that the dents on the car are really resolved by the experts. Each body repair shop sets a different service fee. Therefore, do some research first, how much is the estimated cost of servicing a car bumper.

The cost of repairing a car bumper in a repair shop
The estimated cost of servicing a bumper car at an official repair shop ranges from IDR 800 thousand to IDR 1 million, while at a specialist repair shop it starts from IDR 200 thousand to IDR 900 thousand.

Ideally, the cost of repairing a car bumper is calculated based on how long the damaged part of the bumper is in centimeters and per panel and how severe the damage is.

For example, if a damaged car bumper is 10 to 20 centimeters long, the price is set to range from Rp. 100 thousand to Rp. 150 thousand.

If the car bumper has a fairly severe level of damage such as torn, then the costs required will be much higher. In general, the cost of painting the bumper of the Avanza and other small cars that have been repaired is IDR 350 thousand per panel, while MPV and SUV cars start from IDR 450 thousand per panel.

Meanwhile, if the bumper repair is carried out at a duco paint shop, the repair fee starts from Rp. 500 thousand and the cost can still be negotiated.

If we make repairs using the PDR technique, the costs start from IDR 200,000. The PDR technique is a technique for repairing a car body without repainting and doing it from the inside using a special tool inserted into a dented panel plate.

Causes of broken or dented car bumpers
The cause of the car bumper can be broken, damaged or dented due to several factors, including:

  • Collisions with other vehicles that create scars on a minor scale or damage that is quite fatal, such as broken parts of the body and bumper of the car.
  • Hitting a hard object or object other than a vehicle can also cause a dent in the bumper to break.
  • Got hit by something pretty hard.
  • The habit of carelessly storing or parking a car so that it has the potential to scratch up to dents on the car.
  • The best-selling car bumper modifications
  • Especially for cars that don’t have a car bumper, usually car owners will look for a place to vary the front and rear bumpers.

However, not infrequently car owners who already have a bumper in their car continue to modify the bumper with the aim of emphasizing the sturdiness, valor, and luxury of the car. The following are the types of car bumper modifications.

Car bumper made of plastic or fiber
As previously mentioned, apart from iron or steel, car bumpers can be made of plastic or fiberglass (fiber).

In fact, car bumpers with fiber and fiberglass mold materials are highly sought after because they can be shaped according to the wishes of the car owner at a fairly affordable price.

Even though the price is cheap and this material is flexible, fiber material is actually recommended as a chassis support for ladder or monocoque type so that it is safer in the event of an impact.

Car bumper made of metal or metal
The advantage of a car bumper made of metal or metal is that it emphasizes the strong and dashing impression on the exterior design of the car. However, the drawback is that this material is still less safe than bumpers made of plastic or fiber.

Bull bar (ARB) car bumper
This type of ARB bumper modification is quite familiar in rural areas which are prone to collisions with hard objects such as livestock crossing the road. This type of modification is suitable as a Carry pick-up car bumper.

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