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Re: 05 Ford F150 Spark PLug
Posted to Technical Discussion Forum on 3/16/2018

Hello, Timothy

Here's one I pulled out a long time ago. [melted spark plug shell] As you can see, there's no register mark on the tapered seat due to lack of torque.

The plug looks really bad because it overheated and burned away. I'd look at the piston do... Login to read more.

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