Many manufacturers recommend the replacement of spark plugs at intervals from 30,000 to as high as 100,000 miles. The plugs, however, can become so stuck into the cylinder head due to the dissimilar metals (steel plug threads and aluminum cylinder heads) that corrosion is very possible. To prevent this, we recommend the following:
- Remove existing spark plugs at an earlier service.
- Use anti-seize compound on spark-plug threads before inspecting and reinstalling
- Always allow the engine to cool completely before removing spark plugs.