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> Spark Plug Fired From The Hole
914Bryan
post Dec 26 2011, 05:18 PM
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OK, not directly a 914 problem; Thankfully, my 914 is running fine. (IMG:style_emoticons/default/biggrin.gif)

Can't say the same for my 2005 F150 that decided to fire a spark plug from the #3 cylinder hole. (IMG:style_emoticons/default/mad.gif) Heard a ticking sound that progressively became louder then, kaaPow!. Fired that sucker right out of the threads. Broke the coil and split the spark plug. WOW.

I would like to say that this was unique, but the same thing happened to another cylinder about a year ago. Helicoil solved it. This is getting stupid. Anyone else have this type of problem? Wonder if Ford had a recall regarding this. Only 85K on the engine...Fix and sell? (IMG:style_emoticons/default/smash.gif) Found On Road Dead? (IMG:style_emoticons/default/screwy.gif)
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stugray
post Dec 27 2011, 02:30 PM
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I had this happen on the way to the airport in my 75 Buick Skylark.

I heard the engine getting louder & louder until it sounded like the exhaust had come off.

I looked under the hood, and a spark plug was MISSING.
I thought Cr aP - how will I make my flight now.

I looked around and found the plug jammed in the motor mount.
I screwed it back in finger-tight and was on my way!!!

On another note: "steel plugs in aluminum heads = problem waiting to happen."

In my world (aerospace), it is Absolutely Verboten to put a threaded fastener directly in Aluminum.
Ford should know better - Google 'Thermal Coefficient of Expansion' for Al vs Steel.

Stu
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