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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 engine

5.4 to 4.6 engine swap possible?

 
  #16  
Old 09-12-2010, 01:03 PM
FlyByNight
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Originally Posted by thumper477 View Post
Good idea on the head swap.I will have to do some resesrch on that to see if it is possible.
Good luck with whatever you decide to do.
 
  #17  
Old 09-12-2010, 11:15 PM
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Originally Posted by Beechkid View Post
A sales job if I ever heard one before!!!!!!!!!!!!!!!!!!!


1500-3000 doesn't seem too terrible to replace the engine to me? Ive got a lot of miles on my 5.4 and its great (but you've heard enough in the 5.4's defense) The real thing that you need to consider is just HOW bad the price is for the replacement engine, how much money are you really saving with a 4.6? how much of that money will go towards misc parts for the swap? is it worth saving the money for all the extra time and effort of swapping a different engine?

You sound like the kind of person who knows his stuff and would maintain whatever new engine you chose for your truck. I think it would be easiest to go with another 5.4 and just keep up on the regular maintence and you should have no problem getting over 200k+ miles out of your new engine. start fresh
 
  #18  
Old 09-13-2010, 10:42 AM
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Well,the more I think about it,keeping the 5.4 is probably the best way to go.If it was 20 years ago and there was'nt so intermingling of engine control systems with EVERY other system in the truck,I would consider swapping in a different engine.I am just fearful that even after I might spend countless hours researching every possible problem with the swap,something will show up AFTER the swap is done to throw a monkey wrench into the equation.Especially since I might be the first person to consider the swap or actually do one.It is bad enough to do this job once let alone finding out in the end that the 4.6 will not work and then having to do it over again with a 5.4.I guess a quality reman with a good warranty might be the best way to go in the long run.Thanks for all the input and suggestions from all of you on this forum.I will update as the job progresses.Has anyone here had any experience with the installation of a reman 5.4? 3v engine?I have heard that there have been some problems.
 
  #19  
Old 09-13-2010, 12:02 PM
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Don't rule out Ford's remanufactured engines, either. They are competitive with Jasper and the reputable builders out there. But I would go with a long block either way. Good luck on the outcome whichever way you go. I've always wondered how difficult stuffing a 460 in there would be. I'm sure it would be a electronic nightmare.
 
  #20  
Old 09-13-2010, 07:48 PM
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I'm trying to figure out how a used 5.4 3v is more expensive than a used 4.6 2v with all of the goodies for a swap.


just rebuild your current block. machine it .010 to .020 over, get new pistons and new bearings. you should be able to re-use alot of the OEM parts. Even replacing most everything but the block and heads, you can rebuild a motor for under $1,000.


The 5.4 3v is hardly a hand grenade. It's a solid motor that has been around for a long time with a proven track record. It does have oiling issues with the cam phasers, which is why you need the oil filter with anti-drainback. Otherwise, the 5.4 3v is rock solid. I think you are confusing an abuse issue with a reliability issue. And you are only flaming the fire by listening to sales reps who are pushing a product
 
  #21  
Old 12-14-2014, 09:45 PM
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doing a 5.4 to 4.6 swap did u complete it? im doing it myself.any advice?

Originally Posted by thumper477 View Post
Well,the more I think about it,keeping the 5.4 is probably the best way to go.If it was 20 years ago and there was'nt so intermingling of engine control systems with EVERY other system in the truck,I would consider swapping in a different engine.I am just fearful that even after I might spend countless hours researching every possible problem with the swap,something will show up AFTER the swap is done to throw a monkey wrench into the equation.Especially since I might be the first person to consider the swap or actually do one.It is bad enough to do this job once let alone finding out in the end that the 4.6 will not work and then having to do it over again with a 5.4.I guess a quality reman with a good warranty might be the best way to go in the long run.Thanks for all the input and suggestions from all of you on this forum.I will update as the job progresses.Has anyone here had any experience with the installation of a reman 5.4? 3v engine?I have heard that there have been some problems.
I'm going to do a 5.4 to 4.6 engine swap. I have an f250 with a 5.4 that seized up. My other truck has a blown tranny but a real strong running 4.6 in an f150.so I want to swap the 5.4 out for the 4.6,did you do this and were you sucsessful
 
  #22  
Old 12-14-2014, 09:47 PM
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doing a 5.4 to 4.6 swap did u complete it? im doing it myself.any advice?

I'm going to do a 5.4 to 4.6 engine swap. I have an f250 with a 5.4 that seized up. My other truck has a blown tranny but a real strong running 4.6 in an f150.so I want to swap the 5.4 out for the 4.6,did you do this and were you successful in doing this? I want to do it soon so any advice would be greatful.or am I waisting my time cause it won't work? I'm hopeful it will as I love my 250. Please email me with any advice you can give to [email protected]
 
  #23  
Old 12-18-2014, 06:28 AM
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I recall from reading other threads going/swapping from 4.6 up to 5.4;

Torque converter has to be changed to match the engine, issues relating to the 2V vs 3V computers (beyond my ken).
 
  #24  
Old 05-15-2019, 11:13 PM
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HEY 60DRB. To do the swap from a 5.4 to a 4.6. I have the 4.6 in the truck also junkyard computers for the 4.6 I've tried multiple ECM's but the truck will not start. It turns over. It has spark. It also has fuel pressure. The timing is good because this 4.6 came from a 1999 year truck and it has 30,xxx miles I know this because the gauge cluster has that mileage on it and so does the transmission that came with the motor. but it plainly wont start.
 
  #25  
Old 05-16-2019, 08:44 PM
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Originally Posted by Alex2546 View Post
HEY 60DRB. To do the swap from a 5.4 to a 4.6. I have the 4.6 in the truck also junkyard computers for the 4.6 I've tried multiple ECM's but the truck will not start. It turns over. It has spark. It also has fuel pressure. The timing is good because this 4.6 came from a 1999 year truck and it has 30,xxx miles I know this because the gauge cluster has that mileage on it and so does the transmission that came with the motor. but it plainly wont start.
Why did you use an older engine? Did the one you swap with have a 2v to begin with?
 
 
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