3.9L magnum V6 to 5.2L magnum V8 swap
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Registered User
Joined: Jul 2010
Posts: 28
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From: Detroit, MI
3.9L magnum V6 to 5.2L magnum V8 swap
hey, i just got word that my engine is screwed, and i was wondering if swapping from a 3.9L to a 5.2L is relatively easy, or if its even worth it. Thanks for the help 
Veteran
Joined: Jun 2010
Posts: 328
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From: Omaha, Nebraska
found one ---
https://dodgeforum.com/forum/1st-gen...swap-info.html
or
https://dodgeforum.com/forum/1st-gen...questions.html
or
haha the faqs section
https://dodgeforum.com/forum/1st-gen...-and-more.html
5.2L to 5.9L v8 (LA to LA or Magnum to Magnum)
The 5.2L and 5.9L v8s are externally identical engines, meaning they share the same dimensions and mounting locations. They also share the same heads and intake. The easiest way to do this swap is to get a 5.9L from heads down (long block). You will need the flexplate (or flywheel) and harmonic balancer for the 5.9L because the two engines are balanced different. Everything else from the 5.2 will swap over including wiring harnesses, injectors, and the computer.
Click here for a good article on 3.9, 5.2, and 5.9 engine info and year to year changes.
https://dodgeforum.com/forum/1st-gen...swap-info.html
or
https://dodgeforum.com/forum/1st-gen...questions.html
or
haha the faqs section
https://dodgeforum.com/forum/1st-gen...-and-more.html
5.2L to 5.9L v8 (LA to LA or Magnum to Magnum)
The 5.2L and 5.9L v8s are externally identical engines, meaning they share the same dimensions and mounting locations. They also share the same heads and intake. The easiest way to do this swap is to get a 5.9L from heads down (long block). You will need the flexplate (or flywheel) and harmonic balancer for the 5.9L because the two engines are balanced different. Everything else from the 5.2 will swap over including wiring harnesses, injectors, and the computer.
Click here for a good article on 3.9, 5.2, and 5.9 engine info and year to year changes.
