# Spark Plug Exploding **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** sparkplugs, plug\ **Created:** [January 9, 2008, 6:09pm UTC](https://community.cartalk.com/t/spark-plug-exploding/9202 "2008-01-09T18:09:23Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Jannifer](https://avatars.discourse-cdn.com/v4/letter/j/8baadc/32.png) [@Jannifer](https://community.cartalk.com/u/Jannifer)\ **Post date:** [January 9, 2008, 6:09pm UTC](https://community.cartalk.com/t/spark-plug-exploding/9202/1 "2008-01-09T18:09:23Z")
2002 Kia Sedona, middle spark plug exploded, threads in the head are gone, anyone know the cause? ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [January 9, 2008, 6:12pm UTC](https://community.cartalk.com/t/spark-plug-exploding/9202/2 "2008-01-09T18:12:18Z")
“Middle spark plug”? Did the plug explode, or did it blow out of the head? The latter I’ve heard of, not the former. The usual cause of a plug blowing out is improper installation, either by installing it too loosely or by cross-threading it and stripping out the threads. ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [January 9, 2008, 6:14pm UTC](https://community.cartalk.com/t/spark-plug-exploding/9202/3 "2008-01-09T18:14:38Z")
Should have added: The repair is usually pretty straightforward. The hole is drilled and tapped, and a Heli-coil or similar gizmo is installed. The new spark plug screws into the Heli-coil. ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [January 9, 2008, 6:16pm UTC](https://community.cartalk.com/t/spark-plug-exploding/9202/4 "2008-01-09T18:16:25Z")
Or overtorquing it and overstressing the threads. Yeah, I agree. The good news is that it can be repaired readily and permanently. The hole gets a helicoil. ---
**Author:** ![cappy208](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cappy208/32/31_2.png) [@cappy208](https://community.cartalk.com/u/cappy208)\ **Post date:** [January 10, 2008, 12:21am UTC](https://community.cartalk.com/t/spark-plug-exploding/9202/5 "2008-01-10T00:21:01Z")
did you have the plugs replaced recently? if you did, take it back there and have them replace/ repair the hole they messed up. if you have never had the plugs replaced, then this is an unfortunate oops which you need to fix anyway. (or have fixed)