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How to Fix a Cracked Coolant Reservoir

How to repair a Coolant Reservoir tank: a comprehensive guide

Coolant Reservoir

A crack in your car’s Coolant Reservoir tank can spell bad news for the safe and efficient operation of your engine. When the engine heats up during operation, the coolant tank acts as a temporary container for your vehicle’s coolant, which is pushed out of the radiator. If the engine temperature drops, the coolant stored in the radiator itself is replenished.

Although it is relatively easy to diagnose and even repair a crack in the radiator tank, extreme caution must be exercised due to the high pressure that this component is subjected to during operation. It’s almost always best to replace a cracked tank entirely, but below are steps you can use for a quick fix.

If you have a cracked coolant tank in your car, don’t panic. This is a common problem that can be solved without breaking the bank. In this post, we will give you a step-by-step guide on how to repair a cracked coolant tank.

What is a Coolant Reservoir Tank?

A coolant tank is a small plastic tank that sits next to your car’s radiator. In the process, excess coolant accumulates, which expands as the engine heats up. This helps to maintain the correct level of coolant in the engine and prevent overheating.

Signs of a cracked coolant tank:

The most obvious sign of a cracked Coolant Reservoir  tank is a visible crack or leak. You may also notice that your car is losing coolant faster than usual. In some cases, the engine may overheat or the engine light may come on.

What causes the coolant tank to explode?

There are several reasons why a coolant tank can burst. Over time, plastic can become brittle and weaken. Constant heating and cooling of the engine can also put pressure on the tank, causing cracks. Accidents or collisions can also damage the tank.

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Steps to Repair a Cracked Coolant Reservoir Tank

Here are the steps you need to follow to repair a cracked coolant tank:

Step 1: Gather the necessary tools

Before you begin, you need to assemble the necessary tools. You’ll need a set of socket wrenches, pliers, a flat-head screwdriver, a hose clamp, a razor blade, and a plastic welder or epoxy resin.

Step 2: Draining the cooling system

The first step is to drain the coolant from the system. To do this, locate the drain plug at the bottom of the refrigerator and open it. Place a bucket underneath to catch the coolant as it drains.

Step 3: Remove the tank

Using a set of slots and pliers, loosen any screws or clips holding the tank in place. You may also need to use a flat-head screwdriver to remove it.

Step 4: Clean the tank

Clean the tank thoroughly with soap and water. Use a razor blade to scrape away any excess plastic or dirt around the crack.


Step 5: Seal the crack

Using a plastic welder or epoxy resin, apply a small amount of material to the crack. Flatten with a spatula and allow to dry according to the manufacturer’s instructions.

Step 6: Replace the tank

Once the crack is repaired, the tank can be reinstalled. Use the same screws or clips you removed earlier to fix it.

Step 7: Flood the cooling system

Fill the system with the appropriate type of coolant. Recommended type and quantity, be sure to refer to the instruction manual.

What is Archivebate?

What is the cost of replacing or repairing the refrigerant tank?

If the cracks in the coolant tank can no longer be repaired with epoxy resin, you may need to choose a different course of action or solution to solve the problem. Simply put, you need to replace the coolant tank to avoid overheating the engine.

In general, the average cost of parts and labor for this type of repair work can range from $403 to $425 (i.e., the average cost of parts is $59 to $74 and the cost of labor is $345 to $351). It’s also important to note that these estimates don’t include taxes or fees that can be reported on these repairs.

Can you drive with a cracked coolant tank?

A cracked coolant tank can cause serious damage to the engine if it is not repaired as soon as possible. Therefore, you should always take the necessary precautions before proceeding with a cracked coolant tank.

For example, if it’s a serious leak that’s causing drafts and potholes under your car, the tank will need to be repaired or replaced before you can continue your journey.

Final Thoughts:

A cracked coolant tank should not be taken lightly, as it can cause serious damage to the engine. Therefore, it is important to repair it as soon as possible to avoid further damage. By following the steps in this article, you can successfully repair a cracked coolant tank at home without spending a lot of money. Remember to be patient, follow the instructions carefully, and take all the necessary precautions to ensure your safety. With these tips and a little effort, you’ll be back on the road in no time.


There are many different causes of a cracked coolant tank. From age to overpressure due to extremely low temperatures, there are several reasons why a tank can withstand this type of damage.

As a result, everyone needs to be aware of the warning signs and symptoms of a damaged coolant reservoir tank, as well as how to spot coolant fluid puddles beneath cars.

Early knowledge of this information will allow the proper safety measures to be implemented before the engine overheats and causes significant damage. The right adjustments can be made before an engine overheats because cooler reservoir tanks are repairable or replaceable.

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