LS1 Spark Plug Inserts
#4
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Does a heli-coil serve as a form of insert to fill the extra gap of the enlarged hole? Also, does the welding involve lining a stripped hole with molten aluminum and tapping it after it has cooled?
On a stock thread, what's the spark plug torque threshold before the thread goes? Does the entire engine have to be out of the bay in order for a stripped hole to be worked on?
Thanks a lot.
On a stock thread, what's the spark plug torque threshold before the thread goes? Does the entire engine have to be out of the bay in order for a stripped hole to be worked on?
Thanks a lot.
#5
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Hi- not sure about the actual breaking point of the threads, but it is way beyond the point that a reasonable person would wrench it. Most of the time, the problem happens when threads are crossed when inserting the spark plug. (One reason to insert them quite a bit by hand, not a socket right away!)
You need to remove the heads to repair the threads, not the entire engine.
You need to remove the heads to repair the threads, not the entire engine.
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Jegs and a few others sell a tool to repair stripped spark plug threads with the head still on the car. here it is
http://www.jegs.com/i/JEGS/555/80595/10002/-1
that's the page . If the threads are too bad for that to work then removal is recommended for a threaded insert. but it is possible to do it with the head still on the car just use a lot of grease to catch the metal shavings before they get into the engine.
http://www.jegs.com/i/JEGS/555/80595/10002/-1
that's the page . If the threads are too bad for that to work then removal is recommended for a threaded insert. but it is possible to do it with the head still on the car just use a lot of grease to catch the metal shavings before they get into the engine.