4.0-4.6 Swap

[Hxwielol]

Good Morning, I am curious for some opinions on a 4.0 to 4.6 swap in a 2007 mustang. I have done some research and most say its pointless for the price and to simply do a coyote swap for more bang for your buck or to sell the 4.0 and buy a 4.6. This I completely understand but under my circumstances I feel its a little considerable to do the 4.0 to 4.6. Let me explain. I am in the mix of purchasing a 2008 4.6 3v engine with nothing but a timing issue for around $600. I also have TR-3650's from 05-09 lined up as well for around $600. The prices Im getting seem to create a bit of a vision where the swap could be worth it. I am aware that I would need more things (Driveshaft, rearend, Clutch, etc.) But I could simply find a parts car or junkyard car and get most things for about another $600-$1000 at most. Along with a timing fix for another $100 and miscellaneous things like brakes and things of that nature for another $500 it almost seems like $2.5k for all needs. Not to mention the $800-$1000 I could get back from my current 4.0 Engine and manual transmission. Is this worth it or should I hold off?

 

[Dino Dino Bambino]

You're going to need at least $1000 in parts alone (Ford Performance camshaft drive kit, Ford Performance cam follower/lash adjuster kit, new oil pump, new valve stem oil seals) to refresh that 4.6. That's if it isn't hiding any other problems. You'll also need the ECU, engine harness, body harness, gauge cluster, TR3650 transmission, driveshaft, rear axle, and brakes from an 05-09 GT. Therefore you really need a complete parts car in order to finish the project properly. You'll also need several days or even weeks in labor, a two-car garage, and a lift. If you're going to pay someone else to do the work, don't bother because it'll cost an arm and a leg. Just trade up to an 05-09 GT and save yourself a lot of hassle as well as money, especially if your 07 V6 is a daily driver.

If you only use the car occasionally, another option is to buy a complete 11-14 GT parts car and swap the 412/420hp Coyote 5.0 engine plus other mechanicals, electrics, and interior into your car.

A third, and cheaper, option is to buy a complete 11-14 V6 parts car and do the same procedure but with the 305hp 3.7 V6. @TARA-fied1 successfully did this swap and here's his thread:

4.0 to 3.7 V6 swap

Hey all, I am new here but not new to Mustangs. I couldn't find an actual swap thread for the 3.7 Cyclone replacing the 4.0 SOHC so I thought I'd document my project here. Back story, the 07 4.0 auto was originally my wife's car. We bought it used but it was only a year or two old and in great...

www.s197forum.com

 

[TexasBlownV8]

In case you haven't seen my writeup (there's also a link in here somewhere), details on all what is needed. Getting all the parts is the biggest challenge. Finding a complete donor car is optimal, but sounds like you have a good lead on a lot of the parts already. It's pretty easy to do the swap, once you have what you need

4.0L V6 to 4.6L V8 swap how-to - 2005-2010 - MustangForums.com

Motor Swap Section - 4.0L V6 to 4.6L V8 swap how-to - 2005-2010 - (this is a copy of my writeup from How to Do 4.0 to V8 swap - on Mustang Collective (http://www.mustangcollective.com/showthread.php?t=38141)) This thread is intended to be a comprehensive how-to on doing a 4.0L V6 to V8 swap...

mustangforums.com

 

[whitmanink]

Yep .. I too had a 4.0 slow and wanted to do a v8 and the main goal . A v8 on3 turbo...
I was gonna kinda go your route..
Until I realized I'd need the ECU and harness.ect..

That said .
I opted to go to copart online and get a wrecked gt ...
I was very very lucky tho . In the sense I was able to take the doors and hood and fender off my v6 and swap it to the v8 for the ultimate easy peesy swap...

Regardless of how you are able to do it..
The only realistic way . Is a donor car

And even then..
You might still need a part or two because what you wanted from the donor car turned out to be no good or trashed...

so some spare cash is always good

 

[Juice]

"Just a timing issue ..". Sure....