90 ranger spark plug thread problems.

[Jodygoodwin704]

I own a 90 ranger 2.3 liter. Never have I had such a difficult time with a spark plug. Changed the plugs about 2 months ago. The one plug on the driver's side in the back keeps blowing the plug. Put in a heli coil and it did it again! Other than this issue the truck runs like a top. I am at a loss as to what to do now. Any advice is greatly appreciated.

 

[Dirtman]

Unfortunately sounds like it's time for a new head... not much you can do if a helicoil fails.

 

[black_demon69]

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no experience with this but might work

 

[Eddo Rogue]

Try a time-sert.