V10 which one with issues
So how do you know which engine won't have the spark plug issue? If the C is an 01, how do you tell? Is there something stamped on the engine or some place you can look it up? :? Hubby decided he ...
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Easiest way to tell for sure is to look for the "PI" stamp (with a mirror) on the passenger cylinder head above the front exhaust port:
Above the right-hand port in this pic you see the "PI":
Here is where it is in the engine bay of an F150 (similar, but V8):
After that, 2000+ (PI heads as noted in picture) still have a decent chance of being all right, but can still have problems due to improper machining of the spark plug threads (they increased the number of threads on PI heads, but they can still have problems). 03 or 04+ will be fine. 97-99 would be the ones to avoid, but fixing them can usually be done without tearing the engine down.
Above the right-hand port in this pic you see the "PI":
Here is where it is in the engine bay of an F150 (similar, but V8):
After that, 2000+ (PI heads as noted in picture) still have a decent chance of being all right, but can still have problems due to improper machining of the spark plug threads (they increased the number of threads on PI heads, but they can still have problems). 03 or 04+ will be fine. 97-99 would be the ones to avoid, but fixing them can usually be done without tearing the engine down.
