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How to Add Coolant to Jeep Wrangler

how to add coolant to jeep wrangler

Maintaining the proper level of coolant in your Jeep Wrangler is crucial to ensure the optimal performance of the vehicle. Coolant helps regulate your engine’s temperature and prevents overheating, which can lead to engine damage and costly repairs.

As a responsible vehicle owner, it is important to know how to add coolant to Jeep Wrangler to avoid any potential issues in the future. This article will provide a comprehensive look at the step-by-step process of adding coolant to your Jeep Wrangler.

What You’ll Need:

  • A Jug of Coolant (Check the owner’s manual to determine the correct type of coolant)
  • A Funnel
  • A Rug or Towel
  • Gloves (Optional)

Before we begin, it is important to note that adding coolant should only be done when the engine is cool. Attempting to add coolant while the engine is hot can result in a serious injury. Additionally, it is important to only use the manufacturer-recommended coolant for your specific Jeep Wrangler model.

Step 1: Locating the Coolant Reservoir

preparing to add the coolant

The coolant reservoir in a Jeep Wrangler is typically located near the front of the engine bay, on the passenger side. It is a plastic container with a cap that has a coolant symbol on it. However, depending on the model and year of your Jeep Wrangler, the location of the coolant reservoir may vary slightly.

Another option is to locate the owner’s manual for your Jeep Wrangler should have information on the location of the coolant reservoir. The owner’s manual will provide the assistance you need when locating the coolant reservoir.

You can also look for coolant hoses that run from the radiator. Follow these hoses to locate the reservoir, which should be located nearby.

Step 2: Checking the Coolant Level

Once you have located the coolant reservoir, you can check the coolant level to determine if you need to add more. You can look at the side of the coolant reservoir to see if there are marks indicating the minimum and maximum level of the coolant. The coolant level should be between these markings. If the level is below the minimum mark, you need to add more coolant.

If your Jeep Wrangler does not have markings on the coolant reservoir, you can use a coolant tester to check the level. To use a coolant tester, simply insert it into the coolant reservoir and squeeze the bulb. The tester will draw in coolant, and you can read the level on the side of the tester.

Lastly, if the coolant reservoir is opaque and you cannot see the coolant level, shine a flashlight through the side of the reservoir to get a better view.

Step 3: Preparing to Add the Coolant

To prepare to add the coolant, you will need to first make sure that the engine is cool. Do not attempt to add coolant to a hot engine, as this can be dangerous. If the engine is warm, wait for it to cool down before proceeding.

It is important to check the coolant level when the engine is cold, as checking it when the engine is hot can result in inaccurate readings. Make sure your Jeep has been parked for at least an hour before checking the coolant level and adding the coolant.

Step 4: Adding the Coolant

adding the coolant for jeep wrangler

Once the engine is cool, you can start adding the coolant. First, remove the cap from the coolant reservoir. Then, insert the funnel into the reservoir opening. Slowly pour the coolant into the funnel, being careful not to overfill the reservoir. Keep pouring until the coolant level reaches the “MAX” mark. Always remember to use the correct type of coolant recommended by the Jeep’s manufacturer.

Step 5: Replacing the Caps and Checking the Leaks

After adding the coolant, replace the cap on the reservoir and tighten it securely. Then, start the engine and let it run for a few minutes. Check for any signs of leaks around the reservoir or hoses. If you notice any leaks, turn off the engine and address the issue before driving the vehicle.

Step 6: Disposing the Old Coolant

If you are replacing old coolant, make sure to dispose of it properly. Do not pour it down the drain or in the ground, as it can be harmful to the environment. You can check with your local waste disposal facility to find out how to properly dispose of the old coolant.

Step 7: Checking the Coolant Level Again

After driving your Jeep for a few days, check the coolant level again to ensure that it is still at the proper level. If you find out that it is low, repeat the process of adding more coolant again.


Learning how to add coolant to Jeep Wrangler is a must if you own the vehicle. It is a simple process that can be done at home. By following the steps outlined above, you can ensure that the vehicle stays running smoothly and prevent costly engine damage. Always remember to use the correct type of coolant and to never attempt to add coolant when the engine is hot.

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