Spark plug thread cleaning

Hi Paco,

Do not use a tap to run down in there. It will cut the metal and leave metal down inside the cylinder.

Use a 12mm thread chaser. All it does is clean and or reshape the threads without cutting the metal. Apply some of your spark plug thermal paste to to the thread chaser to help lube and make it easier to insert. No need to glob it on. If it meets a little resistance threading down work it back and forth some. Don't just try and muscle it down inside. Be gentle.

https://www.amazon.com/Lang-Spark-Thread-Restorer-LNG-1013A/dp/B007TX0966/ref=sr_1_13?crid=1Y1TMZTC9WZSS&dib=eyJ2IjoiMSJ9.FDpUxvg5lldWfCo3encHtecKmGmUe7adeAl3VwFrA8bommNL1oaUQlO_M7i65z8WwdxdJ0EAm7eBaYZ2oONt36TnxDEFxJ0HtalY8lYh_pol9TC1m7YF6sTLqoIHXZPnMu88YZ88SUb_A-mo2LI3NHqdzFbXMJJmS6XMX2tUEuxG3qutzTTyxMw-6Lxr83Ymo5rgTC2aE-3Y2F9B0h1jCM5t6MWol8Pe66s1v7gjtD4DjgEs9eDRR-32PN238YByzkXZgYQJUKaHgj6zyEF1LZuAXQkYuhjR2_8hG_k5zq0.vlH78fzby_0bUOp-SNoZdLBog9QG2ePvHQWZu8Rr0YE&dib_tag=se&keywords=12mm+thread+chaser&qid=1714680249&sprefix=12mm+thread+chaser%2Caps%2C169&sr=8-13

https://www.amazon.com/ARES-Oxygen-Sensor-Rethread-Threads/dp/B073WJLXQR/ref=sr_1_6?crid=1Y1TMZTC9WZSS&dib=eyJ2IjoiMSJ9.FDpUxvg5lldWfCo3encHtecKmGmUe7adeAl3VwFrA8bommNL1oaUQlO_M7i65z8WwdxdJ0EAm7eBaYZ2oONt36TnxDEFxJ0HtalY8lYh_pol9TC1m7YF6sTLqoIHXZPnMu88YZ88SUb_A-mo2LI3NHqdzFbXMJJmS6XMX2tUEuxG3qutzTTyxMw-6Lxr83Ymo5rgTC2aE-3Y2F9B0h1jCM5t6MWol8Pe66s1v7gjtD4DjgEs9eDRR-32PN238YByzkXZgYQJUKaHgj6zyEF1LZuAXQkYuhjR2_8hG_k5zq0.vlH78fzby_0bUOp-SNoZdLBog9QG2ePvHQWZu8Rr0YE&dib_tag=se&keywords=12mm+thread+chaser&qid=1714680249&sprefix=12mm+thread+chaser%2Caps%2C169&sr=8-6

Thanks a lot Roger,

I will do that way. Thanks!