Blown Spark Plug Coil Nightmare

[sean mclain]

I blew a spark plug about 2 years ago on my 2001 4.6 gt.
I ordered time-sert kit #4412e
the blowout happened and I immediately grounded the car, not much damaged to the threads was done, the tap alone fixed it and no coil was needed, so i put the plug in torqued to spec and put the time-sert kit away.
2 years later (now) i have another blow out in the same plug, it needed to be coiled. but the coil after tapping and boring, was the "deep hole" kit and i needed the shallow one. when putting it in it looked like it was supposed to go deeper and i ended up stripping the coil out of the head. (the coil pulled the new threads in the head out)

is there any way to fix this by going with a bigger size coil? I am completely lost as what to do, the engine is older and not worth the head work. any coil experts have any advice?

here are the time- sert specs

m14x1.25
spark plug kit
deep hole
part # 44122


thanks for any advice in advance!

 

[trombonedemon]

Same happened to me, but a local mechanic drilled to much aluminum and ended using a tapped in Helicoil. Come time to replace the plugs, had to take the helicoil out. So I had a Mustang specialist do a full Time Sert install. All of the plugs were fine except the one that was put in with to much aluminum removed by the previous mechanic. Kept blowing the Time Sert out. 2-3 Time Sert repairs later, it was determined I needed a refurbished Cylinder Head. And the Time Serts redone.

 

[Rusty67]

You might want to just junkyard a head, recondition that one and swap it in.