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Spark plug thread repair
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<blockquote data-quote="FIREBALL" data-source="post: 16912559" data-attributes="member: 178539"><p>I cant guarantee it but the steel inserts should be good--the spark plugs are steel!! Most of the reason the plugs pop out is not because of few threads but because the original factory torque specs of 14lb was not enough and is why they would back out to last couple threads and then blow out. My f150 blew 2 plugs out and now they are torqued to 28lb (with a dab of anti sieze) and my Mustang as well----no more blown out plugs. here is the kit I used <a href="https://www.toolsource.com/spark-plug-rethreading-c-1321_684_685_763/ford-spark-plug-insert-installer-set-p-100849.html" target="_blank">Mountain 9200 Ford Spark Plug Insert Installer Set</a> There will be shavings in the cylinder after you ream out and thread the hole, I reduced down my shop vac to a large vacuum hose to suck out the shavings, I kept plunging the hose until I could not hear any more shaving coming out. Trying to blow out the shavings with a compressor will not get them all out.</p></blockquote><p></p>
[QUOTE="FIREBALL, post: 16912559, member: 178539"] I cant guarantee it but the steel inserts should be good--the spark plugs are steel!! Most of the reason the plugs pop out is not because of few threads but because the original factory torque specs of 14lb was not enough and is why they would back out to last couple threads and then blow out. My f150 blew 2 plugs out and now they are torqued to 28lb (with a dab of anti sieze) and my Mustang as well----no more blown out plugs. here is the kit I used [URL="https://www.toolsource.com/spark-plug-rethreading-c-1321_684_685_763/ford-spark-plug-insert-installer-set-p-100849.html"]Mountain 9200 Ford Spark Plug Insert Installer Set[/URL] There will be shavings in the cylinder after you ream out and thread the hole, I reduced down my shop vac to a large vacuum hose to suck out the shavings, I kept plunging the hose until I could not hear any more shaving coming out. Trying to blow out the shavings with a compressor will not get them all out. [/QUOTE]
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