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How do you determine if the engine head gasket is leaking?

Look for signs of blown head gasket:

- Milky or chocolatey-looking oil.

- Bubbles in the coolant.

- Low engine coolant.

- Overheating engine.

- Rough idling.

- Loss of power.

- White or gray smoke from exhaust.

Test for head gasket leak:

- Perform a compression test.

- Check for hydrocarbons in the coolant.

- Inspect the head gasket for signs of damage.