Unfamiliar with 5.4

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09-09-2022, 02:56 PM

Clutchbuster

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Unfamiliar with 5.4

Hello everyone, I have a question regarding a 98 F250 5.4 I’m unfamiliar with. How can I tell if I have the 2 valve or 3 valve? What’s the difference between them?

Thanks in advance.

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09-09-2022, 04:45 PM

Conanski

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The 3v didn't appear until about 2004 so unless somebody swapped one in(not a simple job) you most likely have a 2v motor.

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09-10-2022, 04:40 PM

STOFFERJ

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Quote:

Originally Posted by Clutchbuster

Hello everyone, I have a question regarding a 98 F250 5.4 I’m unfamiliar with. How can I tell if I have the 2 valve or 3 valve? What’s the difference between them?

Thanks in advance.

you have a NPI (non power improved) two valve

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