Updated at: 20-07-2022 - By: Lucas

Having a car today has many advantages, but it also has some drawbacks. When it comes to car repairs and maintenance, it’s one of the most aggravating.

As a result, it’s important to know the level of damage before deciding what to do and how much to pay.

Fortunately, there is a wealth of useful information on car maintenance issues and how to resolve them available on the internet. Specifically, cracks in the coolant reservoir are a concern for car repairs and maintenance.

It is therefore necessary to know the answers to queries such as, “What causes coolant reservoirs to crack?” when conducting research.

If you have a repair problem, the answer to this question varies from one case to the next. So, here are some of the most prevalent causes of coolant reservoir tank cracks.

  • Degradation from the heating cycles;
  • Overheating due to its position next to a hot engine;
  • Old Age;
  • Polyethylene tank materials (plastic) expands and contract and eventually crack;
  • Excessive pressure from extremely cold temperatures.

When it comes to maintaining your vehicle, it’s not always as straightforward and easy. Cracks in the coolant reservoir tank may not be noticed until the damage has already been done, unless you are an expert in this area.

As a result, here are a few things to keep in mind about your coolant reservoir. Your coolant reservoir must first and foremost be checked on a regular basis for wear and tear.

A worn-out reservoir tank, for example, could indicate that it’s time for a new one. You may save yourself a lot of time and money if you inspect your automobile for signs of overheating early on.

Symptoms that a driver should be aware of if the coolant reservoir is cracked

What Causes Coolant Reservoir To Crack

Because the coolant reservoir is a crucial component of your cooling system, you need to know when it’s time to make repairs or replace it. As a result, you must be familiar with the warning signs and symptoms of a fractured coolant.

1. Reservoir is constantly low on coolant

If you pay great attention to the level of coolant in this plastic tank, you can immediately discover a damaged or failing coolant reservoir. You should check for cracks, for example, if the coolant level is constantly low. This could suggest a leak.

2. Coolant leaks

A fractured container is the most likely cause of fluid leakage under your car if you notice any of the previously stated colors (green, orange, pink, blue, etc.) coming from your reservoir.

3. Engine overheats

The engine may overheat if the coolant reservoir container has cracks or damage. To avoid engine overheating, the coolant must be replenished regularly. Otherwise, the engine would quickly become too hot.

Also, this is a critical issue that must be addressed right once in order to prevent the engine from smoking, burning, or suffering other costly problems as a result of inaction.

How do you repair a cracked coolant reservoir?

Is it repairable or would it be preferable to get a new one?

There are times when a fractured coolant reservoir tank can be repaired. Repairing the coolant reservoir container may be achievable if its age isn’t too high. It’s a lot less expensive than having to buy a new appliance.

After removing the reservoir from the car, you should check the tank for any cracks that could need to be repaired. It’s best to replace the reservoir if the cracks are severe enough.

Using epoxy as a repair option if this inspection shows that a crack can be fixed is a realistic alternative.

What are the costs to replace or repair the coolant reservoir?

What Causes Coolant Reservoir To Crack-3

As a last resort, if the coolant reservoir tank cracks can no longer be repaired using epoxy, you may need to look for an other remedy. The coolant reservoir tank must be replaced to avoid the engine from overheating.

In most cases, the components and labor for this type of repair will cost between $403 and $425 (i.e. $59 to $74 on average for parts and $345 to $351 on average for labor). In addition, any taxes or fees associated with the repairs are not included in these estimates. This should be taken into consideration.

Can I drive with a cracked coolant reservoir?

Leaving a fractured coolant reservoir uncorrected might result in catastrophic engine damage. As a result, before continuing to drive with a fractured coolant reservoir tank, always take the appropriate safeguards.

Repair or replacement of the tank should be done before driving in the event that the leak is large enough to cause streams and puddles.

Can a cracked coolant reservoir cause overheating or bubbling?

Cracks in the reservoir might lead to overheating or bubbling if the coolant cannot be retained in place.

It could also happen if the cooling system’s tank coolant is unable to pressurize the system properly. Regardless of the situation, the engine can overheat if one or both of these problems exist.


Cracks in a coolant reservoir tank can occur for a variety of reasons. Damage to a reservoir tank can occur for a variety of reasons, including old age or severe pressure from extremely cold temperatures.

People need to know the symptoms of a cracked coolant reservoir tank, including how to spot a coolant puddle under their vehicle.

The right safeguards can be taken before the engine overheats and causes major damage if this information is acquired early. Corrective measures can be taken before an engine overheats thanks to the availability of repairable and replaceable cooling reservoir tanks.