How-to » Engine » Mechanical, Lubrication & Cooling » How to Replace a Freeze Plug

How to Replace a Freeze Plug

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Note: This is a general guide for all vehicles.

Parts
  • Freeze Plug
Tools
Difficulty

Hard

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Steps

Safety Tip:
Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes.
1
Locate the round freeze (expansion) plugs on the sides of the engine block.
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2
Pressurize the cooling system using a radiator pressure tester.
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3
Check for leaks at the freeze plugs.
4
Place a drain pan under the radiator. Open the drain valve or remove the lower radiator hose to drain the engine coolant.
5
Strike the inside edge of the leaking freeze plug with a hammer and punch. Remove the leaking freeze plug.
6
Clean the engine block hole with emery cloth. Place a small amount of high-temp sealant on the plug outside edges.
7
Using a large socket (that fits snugly into the plug), hammer in the new freeze plug evenly.
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8
Close the drain valve or reconnect the lower radiator hose and fill the radiator with coolant.
9
Pressurize the cooling system and check for leaks.
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Guide Contributors

  • ARZ at AutoMD.com
  • Jimm at AutoMD.com
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