How to Fix a Radiator

Intermediate 45 min 13 steps 2112 views Rating: 4.2/5 Published: 2026-02-28

Look for puddles beneath your vehicle.. Check the coolant reservoir.. Pay attention to changes in your temperature gauge.

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Steps

1

Look for puddles beneath your vehicle.

Step 1

Look for puddles beneath your vehicle.

2

Check the coolant reservoir.

Step 2

Check the coolant reservoir.

3

Pay attention to changes in your temperature gauge.

Step 3

Pay attention to changes in your temperature gauge.

4

Visually inspect your engine bay.

Step 4

Visually inspect your engine bay.

5

Allow the engine to cool completely.

Step 5

Allow the engine to cool completely.

6

Jack up the vehicle.

Step 6

Jack up the vehicle.

7

Open the petcock and drain the coolant into a container.

Step 7

Open the petcock and drain the coolant into a container.

8

Flush the radiator using a hose.

Step 8

Flush the radiator using a hose.

9

Refill the radiator with a water and coolant mixture.

Step 9

Refill the radiator with a water and coolant mixture.

10

Replace the radiator cap.

Step 10

Replace the radiator cap.

11

Use a commercial leak sealant.

Step 11

Use a commercial leak sealant.

12

Seal visible cracks with epoxy.

Step 12

Seal visible cracks with epoxy.

13

Replace the radiator.

Step 13

Replace the radiator.

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