Spark plug unscrewed itself?
A couple months back I was driving my truck and all of a sudden a loud air shooting noise starting coming from under the hood. So I pulled over and tried to find the problem and it sounded like it was coming from behind the intake manifold so I putted the truck to autozone right down the street and the employees there came out an said it was probably a crack in my exhaust manifold, they tried to get me to order one from them but I held off good thing I did cause it was a spark plug that had came loose that I only had to replace. Has this ever happen to anyone else??
4.6 only had 4 threads in the heads and the plugs like to back out. A lot of times it will mess up the threads and you have to use something like a timesert so you don't have to replace the head.
This happened on my ol B2200 and I had to helicoil the thread. If you still got threads, torque the plugs down to spec. And recheck in a 100 miles or so. Then hope that it doesn't happen again haha
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This happened on my 06 a few months back but I caught it before anything bad had gotten to happen. I was lucky because I was in the middle of a plug change and it happened on 2 plugs on the passenger side dropped my socket into the cylinder head put my extension in and was scared real bad because it just started to spin by hand.... Thankfully the threads were fine I torqued them to spec checked them again after 120k and they were good! Just regular maintenance and some anti seize does wonders


