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Old Feb 11, 2025 | 09:42 AM
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Compatibility

Hi I'm new and not a mechanic by any means but have a question.
I have an 04 F-150 lariat crew cab 4x2 with a good engine . I also have an 04 F-150 fx4 4x4 with a blown up engine. The question is Are the engines interchangeable. I'm talking about plug n play interchangeable. I realize if you have the tools time and money you could fit that engine on a lawnmower chassis.
Any help is appreciated
 
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Old Feb 11, 2025 | 12:15 PM
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Unless Ford threw some sort of mid-year curve, the engines should swap just fine if they are both 3V engines.

Even if they don’t, swap what need to be swapped to the transplant vehicle engine.
 
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Old Feb 11, 2025 | 02:26 PM
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Are they both NBS or Heritage?
There are differences starting in 2004.

You also have to look & see if they are both Triton 3v or both 2v engines.
Are they both the same displacement? 5.4L vs 4.6L
The answers will not necessarily be deal breakers, it will likely determine if you need to bring sensors & computers & not reuse whats in there.
 
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Old Feb 11, 2025 | 04:45 PM
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Originally Posted by G2IC_Wraith
Are they both NBS or Heritage?
There are differences starting in 2004.

You also have to look & see if they are both Triton 3v or both 2v engines.
Are they both the same displacement? 5.4L vs 4.6L
The answers will not necessarily be deal breakers, it will likely determine if you need to bring sensors & computers & not reuse whats in there.
They are both NBS both 5.4 I don't know if they are 2v or 3v . How do I find that info
 
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Old Feb 11, 2025 | 09:31 PM
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I don’t see many 5.4L 2v engines but according to vin would be the fastest:
8th digit: L, its a 2-valve engine; N, its a 3-valve engine.

Also on top of the air intake should say either 5.4L 3v Triton or 5.4L Triton.
The first one is a 3v engine & the other is likely a 2v.
 
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Old Feb 12, 2025 | 05:16 AM
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they will swap just fine.
 
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Old Feb 13, 2025 | 09:50 AM
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Originally Posted by G2IC_Wraith
I don’t see many 5.4L 2v engines but according to vin would be the fastest:
8th digit: L, its a 2-valve engine; N, its a 3-valve engine.

Also on top of the air intake should say either 5.4L 3v Triton or 5.4L Triton.
The first one is a 3v engine & the other is likely a 2v.
The 8th digit of VIN on lariat and the FX4 is 5
 
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Old Feb 14, 2025 | 06:38 AM
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same...same
 
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