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Turning a 4.6 into a 5.4

  • Thread starter Thread starter Green mustang
  • Start date Start date Jun 10, 2025
G

Green mustang

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Jun 10, 2025
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Ganado
Jun 10, 2025
#1
  • Jun 10, 2025
  • #1
I got a 5.4L block right now and wanted to build this one, could my 4.6L rods and piston work on the 5.4L crankshaft, is it possible

And my 4.6L is trashed, had a huge crack and is not save able so I found me a 5.4L iron block and cleaned it up and hone the cylinder walls like brand new but the engine I got didn't have piston or rods with it, that why I was wondering if my 4.6L piston and rods will work
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
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Jan 4, 1985
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Jun 12, 2025
#2
  • Jun 12, 2025
  • #2
These parts are not interchangeable. Bore size may be similar but the connecting rod locations differ between the two dissimilar strokes.

It's a recipe for carnage.
 
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