Question

How do you stop a motorcycle spark plug from seizing?

Answer 1

If you're experiencing a seized spark plug on your motorcycle, it can be a frustrating issue. Here are some steps you can take to try and free a seized spark plug:

1. Spray penetrating oil: Apply a high-quality penetrating oil, such as WD-40 or PB Blaster, to the area where the spark plug threads into the cylinder head. Let the penetrating oil sit for a few hours or overnight to allow it to work its way into the threads and loosen any corrosion.

2. Heat the area: Use a heat gun or a propane torch (carefully) to apply heat to the spark plug and the surrounding area. The expansion and contraction caused by heating and cooling can help break up any corrosion and loosen the seized spark plug.

3. Use a spark plug socket and a breaker bar: Use a spark plug socket that fits snugly around the spark plug and attach it to a breaker bar for added leverage. Slowly and carefully try to turn the spark plug counterclockwise (lefty-loosey) to loosen it. Apply steady, even pressure while turning, but avoid excessive force to prevent damaging the spark plug or cylinder head.

4. Alternate directions: If the spark plug does not loosen in one direction, try turning it clockwise (righty-tighty) slightly to break up any corrosion before attempting to turn it counterclockwise again.

5. Apply more penetrating oil: If the spark plug is still stuck, apply more penetrating oil and repeat the heating process. Allow the oil to penetrate for a longer period this time.

6. Seek professional help: If all attempts fail, it may be best to seek assistance from a professional motorcycle mechanic. They have specialized tools and experience in dealing with stubborn spark plugs and can prevent any further damage to your motorcycle.

Remember, when dealing with a seized spark plug, patience is key. Applying excessive force or using improper tools can lead to further complications, such as damaging the spark plug threads or breaking the porcelain insulator. If you're unsure about the process or uncomfortable performing the steps yourself, it's always recommended to consult a professional.