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pshoremo
06-19-2018, 12:54 PM
Can anyone confirm for me what the correct thread size is on the spark plug?

Thanks!
DMC-81
06-19-2018, 02:48 PM
According to this link the OEM plug thread size is 17mm.
https://m.autozone.com/external-engine/spark-plug/bosch-silver-spark-plug/315300_199221_0
DMC-81
06-19-2018, 09:15 PM
According to this link the OEM plug thread size is 17mm.
https://m.autozone.com/external-engine/spark-plug/bosch-silver-spark-plug/315300_199221_0

Sorry, here is a better link with more info on the Specs tab. According to this, the thread size is 14mm and the thread pitch is 1.25 .

https://www.sparkplugs.com/product.aspx?zpid=8261

Perhaps someone can confirm this by actual measurements. I don't have one nearby.
cis6409
06-20-2018, 09:40 AM
Yes it is.. M14x1. 25
pshoremo
06-29-2018, 06:08 PM
Thank you! I ordered a tap for it and now will just have to get the courage to do it. Thanks again.
SS Spoiler
06-29-2018, 06:27 PM
Did you cross thread the spark plug?
Is it going to hold?
David T
06-30-2018, 10:40 AM
If the threads are damaged typically you do not try to "repair" them with a tap. The preferred method is to get a Heli-Coil kit or one like it. It comes with a drill, a tap, an insert, and a tool to install the insert. You drill the threads out, retap and install the insert. Makes it better than new. Most auto stores will have a kit or can get you one quickly. To prevent this from happening most mechanics use a drop of Never Seize when they install new plugs.