Quote:
Originally Posted by MyFirstZ
I'm pretty sure this was a common issue with the 4.6 motors. Not a spark plug being left loose but the plugs blowing out from the head. I had to do a few of the repairs on this at a private shop I worked at
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I thought it was the 5.4s with the short threaded plugs because engineers know its best to mix things up when its worked forever
Don't forget the ones that did the opposite, you know, stayed stuck in the head!