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Stripped Spark Plug Hole

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OzzmosisDSM

15+ Year Contributor
57
0
Jul 12, 2004
York, Pennsylvania
OK, I'll try to explain this the best I can. I changed the spark plugs in my talon a couple weeks ago. When I tried to put the new plug in the #3 cylander the plug was very resistant to go in. It looked like it was going in straight and not cross threading at all. I got the plug about halfway in before I decided to pull it out and check things out. When I pulled out the plug the very tips of the threads looked like they were rounded slightly, in other words the tips were no longer pointy. I tried 2 other plugs and had the same result with both. When I threaded it back in, the first half of the way went smoothly until it started getting tight again. Well, I went ahead and threaded it in the rest of the way and torqued it down properly. The car runs fine but I'm worried that I may have stripped the hole in the head permanently. If I pull the plug back out is there any way to check if the hole is stripped? Also, is there a way to clean the threads in the head incase there is like a little shard of metal causing the tips of the threads to round off?
 
Well you could try re-tapping it, but I would do it with the head off the car as little shavings of metal may end up in the cylinder. As long as you aren't losing compression through it and the plug isn't a different color than the other 3, I'd say you'll be alright running it as is. Just be careful when changing them so you don't make it worse.
 
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