How to Check and Add Radiator Fluid

Beginner 15 min 13 steps 5290 views Rating: 4.2/5 Published: 2026-06-10

Park the car on a level surface.. Raise the hood.. Look for the radiator cap.

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Steps

1

Park the car on a level surface.

Step 1

Park the car on a level surface.

2

Raise the hood.

Step 2

Raise the hood.

3

Look for the radiator cap.

Step 3

Look for the radiator cap.

4

Wrap a rag over the cap and remove it.

Step 4

Wrap a rag over the cap and remove it.

5

Check the radiator fluid level.

Step 5

Check the radiator fluid level.

6

Find the cap to your radiator overflow tank and remove it.

Step 6

Find the cap to your radiator overflow tank and remove it.

7

Check the freezing and boiling point of your coolant.

Step 7

Check the freezing and boiling point of your coolant.

8

Add coolant as needed.

Step 8

Add coolant as needed.

9

Squeeze the hydrometer bulb.

Step 9

Squeeze the hydrometer bulb.

10

Insert the hydrometer's rubber tube into the coolant.

Step 10

Insert the hydrometer's rubber tube into the coolant.

11

Release the bulb.

Step 11

Release the bulb.

12

Remove the hydrometer from the coolant.

Step 12

Remove the hydrometer from the coolant.

13

Read the freezing or boiling point level on the hydrometer.

Step 13

Read the freezing or boiling point level on the hydrometer.

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