Early Triton engines (both V-10 and V-8's) were known to spit out spark plugs.
Around 2001ish Ford changed the design to include more threads holding in the spark plugs.
In addition: High mileage Tritons are also known for breaking exhaust manifold bolts.
I'm on my 3rd V-10 (a 1999, 2008, and 2014). Had no issues with the 1999 for 138,000 miles. The 2008 broke the exhaust manifold bolts but otherwise was great for 70,000+ miles.
Now on the 2014 (which is in our Axis) has served us well for a meager 20,000 miles and counting.
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