Should You Use Anti-Seize on Spark Plugs? Key Facts
Learn if using anti-seize on spark plugs is necessary and the best practices for installation.
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Using anti-seize on spark plugs is often recommended to prevent threads from seizing in the cylinder head, especially in aluminum heads. However, some spark plug manufacturers coat their plugs to avoid this issue. Refer to your vehicle's manual or spark plug manufacturer guidelines. If recommended, apply a small amount of anti-seize to the plug threads only, avoiding the electrode area.
FAQs & Answers
- What is anti-seize and why is it used? Anti-seize is a lubricant that prevents parts from bonding or seizing together due to rust or corrosion, especially in high-heat environments.
- Do all spark plugs require anti-seize? Not all spark plugs need anti-seize; some are pre-coated by manufacturers to avoid seizing, so check manufacturer guidelines.
- How do you apply anti-seize to spark plugs? If recommended, apply a small amount of anti-seize to the threads only, avoiding the electrode area to ensure proper function.
- What happens if you don't use anti-seize on spark plugs? Without anti-seize, spark plugs can become stuck in the cylinder head, particularly in aluminum heads, leading to difficulty in removal.