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George 8/29/2012
2002 Ford Explorer Sport Trac XL 6 Cyl 4.0L - Preventive Maintenance
200,000 miles on original plugs. Still running good . Should I change?
200,000 miles
1 Answer
  • Jimm
    Jimm 8/30/2012
    Yes, go ahead and change the spark plugs. Even if running OK - no noticeable problems, there is risk of the spark plug threads corrosion over time - meaning the spark plug change possibly will involve cylinder head thread repair for damaged threads. Be sure when changing the spark plugs to place a small amount (one-two threads) of anti-sieze on the new spark plug threads.

    Try the many on-line auto parts sources, such as;, or for the replacement parts.
    George 9/5/2012

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