4.7L to 5.7L HEMI Engine Swap - 2004 Dodge Ram
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- čas přidán 7. 09. 2024
- WIRE DIAGRAMS: drive.google.c...
In this video, I explain how I swapped a 5.7L Hemi engine into my 2004 Dodge Ram 1500. I believe this is the first video created that covers in detail everything you need to successfully do it. This same method can be used for other years too. There’s a lot of information packed into it, so hopefully it goes a long way helping people out.
Big thanks to my friends Liam and Nick for giving me a hand taking things apart and teaching me how to weld, and to my parents for giving me the space to work.
NOTE ON CRUISE CONTROL: The ABS module was not on the shopping list, but you will need it for cruise control to work in the 5.7L because they're a different part number from the 4.7L to 5.7L, otherwise cruise control will not work properly or at all. Pulling the ABS module and PCM from the same truck is the simplest way to avoid the ABS module "VIN Mismatch" code which will cause the ABS and Parking Brake lights to be on in the dash.
Good luck!
Question how much you think you would’ve been charge if you went to a mechanic
Some unbelievable amount, I’m sure. A normal labor rate is around $100/hr, multiplied by my rough estimate of 60 hrs I spent that week it’s $6000 in labor alone. And there would have to be time figuring it out since it isn’t a standard job. Rather then just replacing a part, they’re re-installiing almost all of the exterior electrical and having to make sure it functions correctly.
(Some mechanics please chime in here!)
Nice job. I would liked to seen this in a series of videos. And more of a step by step.
I have personally done several projects with this guy, he’s an absolute genius. Amazing quality video as well!
You came in clutch on a couple of those! Always fun working with you Sir 🤝
Plan on doing this when my 4.7 blows thank you
Cool! No problem
Brother…you have given me an insight on my 5.7,..I thank you for your service
i have question how did cost you to buy 5.7 hemi at junkyard cause i want it
I got my 5.7 for $1,500 from a guy whose truck was t-boned. I got to see it run before buying and it only had 94,000 miles. That was through Facebook Marketplace. At the full-service junkyards they were selling for almost $3000 or more in some cases. I was quoted $2,800 by another shop. These were used at about 130,000 miles.
If you pull one from a junkyard yourself it will normally cost you $500-$1000 but remember: there’s a reason it’s in the junkyard. It could be damaged.
If you can’t find a good running one like I did, there is also eBay ($2000ish) or remanufactured ($5000+). Do some looking around. You can probably find a deal!
Now I want do this to my truck. I'm already having problems with my 4.7
My 2011 4.7 has almost 300k
@lavarunner5057 Damm, that's alot. I've been taking good care of my 4.7 but I think the dude before me skimped out on basic maintenance.
Since this is fairly new post believe it or not you do not need any extra wiring or anything the 4.7 pcm and harness will run and plug straight in to the 5.7 hemi with a few modifications to the throttle body as in manual throttle body hope to hear from you soon
This is technically true, but with some issues. I once read about someone in Germany running a 5.7 off a 4.7 setup like you’re saying but the issue was the programming for the crankshaft and camshaft timing was incorrect (and maybe some other sensors). You may be able to flash a 4.7 PCM with 5.7 programming (maybe) but to get everything to work properly and run any additional/different wiring correctly is very difficult. It can be done, and I considered doing it, but with 5.7 harnesses available at a scrapyard for $50 and a couple hours time, the minimization of variables that could go wrong is 100% worth it. It would cost significantly more time to be sure all the wiring is good if you use a modified 4.7 wiring setup.
I also wanted to keep my truck completely stock to retain its value. My engine may not match the VIN on the door, but the build is a stock build
Systems can be modified and implemented like you’re saying for sure though. I got rid of my manual 4x4 shifter and installed the electronic 4x4 dial switch (switch, module, wiring, and transfer case) simply to give me the footspace on the floor because I make long drives. Like this hemi swap, there was no clear documentation on the internet on how to. I just used the wire diagrams and traced the wires on a scrapyard truck to map it out and do the install. $300 worth of parts and I’m loving it.
If you get a 5.7 working properly on a 4.7 harness, definitely document it and share it on youtube! People will be impressed and enjoy it
@@Jonathan-Vasquez that is where you are 50% correct I ran it with the 4.7 pcm and wiring while I waited to go to the junkyard to get the right 5.7 harness and computer and it ran fine no additional programming or anything just hooked the pedal to a ghetto manual 5.7 throttle body me and my buddy fabricated didn’t have any issues other than it probably wasn’t being ran efficiently and fueling might’ve not been proper and it’ll work fine until whoever is doing the swap has enough money or whatever to get the pcm and harness
Great job then!
@@Jonathan-Vasquez yeah it was experimental I plugged in all the sensors and everything and it somehow worked and I was like well this works and I drove the truck for a little while like that
Good job Jonathan.
Thanks Grandpa!
BR0 might just be a life saver for me
Good to hear!
@@Jonathan-Vasquez 4.7 head blew and i been wanting to do this but really didnt know what i had to get and replace
Me too on the wanting to do it for a long time. I wanted to for 5 years and finally decided to go for it. I learned what all I needed to do at the scrapyard on a junk truck and seriously did my homework. I didn’t know for sure it would all work out because I didn’t have a video like this to reference which is why I made it! It’s a good list of parts you’ll need but once you have them it’s 100% possible and very rewarding
There seems to be a lot of unclear info out there on this 4.7-5.7 swap for 3rd gens so this clears things up and I bet a lot of people in similar situations will be a bit more confident putting out the time/money to do it knowing it will work
So wait did u use the 4.7 transmission or it don’t matter ?
Yes! The 4.7 and 5.7 transmission is the exact same hardware. They are called 45RFE and 545RFE, respectively, but are identical in construction. What changes is the programming such as the shift points when you plug in a different PCM. So, the 5.7 bolts right up to the transmission.
@@Jonathan-Vasquez thank you 🫡
this is so cool!
Hi man...i have 2009 grand cherokee 4.7 i wona swap to 5.7 hemi what i need to do ...thanks
I don’t know. It’s probably very similar but you’ll have to do the research. My schedule is booked. Good luck!
so my 07 dodge has a v6 will the wiring harness connect the same to the inside of the vehicle?
I don’t know but you can find out by checking wire diagrams or physical comparison to a hemi of that year
I changed the hole wiring I don my truck
Sweet!
So when i go to the wrench a part and get a pcm do i need the immobilizer too? Confused how to program the key cant find any locksmith with software to reprogram ecu or pcu
Most PCMs from a scrapyard aren’t going to have SKIM equipped at all because SKIM was only used on the Laramie trim. Since mine is a Laramie and had a SKIM I got my 5.7 PCM’s VIN re-written with the VIN my truck came with (that is also in the SKIM) and then my keys automatically worked because the PCM and SKIM both showed the same VIN. Most locksmiths should be able to re-write a VIN because most scan tools over $1k do it. Locksmith shops usually have the fancy $3k+ ones. If they can program keys, their scanners can re-write the VIN in the PCM too. I’ve also used the Autel MS906 scanner to re-write my VIN. Hope this helps!
I would grab the PCM, SKIM, and ABS all from the same truck if you can because they’ll all show the same VIN, then all you have to do is reprogram your keys. That’s usually a few bucks at the locksmith
What fuse box did you use the 5.7 or can I use the 4.7 fuse box? Also can I remove the fuel and evap line without removing motor at the salvage yard?
I used my 4.7 fuse box, it’s identical.
Yes, you can pull the fuel & evap line without removing the engine. I pulled it over top of the driver side valve cover after taking the intake manifold off. There’s a little clip on the bellhousing with two bolts you can see in the video
When removing the cruise control module under the battery box it ties into a t. I have deleted it but the other end of the t goes into the firewall under the wiper cowl and I have researched and found it's called the vacuum reservoir. Did you delete yours or just change the t into a coupling going into the brake booster ?
Will a 5.7 out of an 04 Durango work in a 04 ram 4.7
They should be identical engines except I’ve heard the starter motor is on the opposite side. You may need a Ram starter to account for the opposite shape
Didnt that generation come with the 5.7l hemi...?
Yes, 3rd gen 1500s came with several gas engine sizes. This one was a 4.7L
@@Jonathan-Vasquez interesting
So the 4.7 was never a good engine even worse if you follow the manufacturers oil change service. Going to a used hemi anything after 2007 is destined to self destruction thanks to the lifters, pushrods, and of course cam failure and still never fixed it up to 2024. If you were original owner and dumped oil always bf 5k it would have made more sense to keep the 4.7 and change the rear. Set of 392 gears would be so much better than the 321gears. But if you had the 355 gears it should have done pretty good even with the 4.7. The 4.7 was the new reject design of the 5.2 magnum which would run for ever.
Good info. The hemi I swapped in is from 05 so it ought to last a long time. 97,000 miles on it right now, runs great
@@Jonathan-Vasquez that's cool bro, I would seriously think about the rear if you have the extra cash. If not put it on your bucket list. If gas mileage is not much of a concern the 392's will make a massive difference. Good luck my friend hope all goes well.
Not only is it a power increase but also reliability upgrade. 4.7 are complete garbage and should be deleted from existence. Never have I seen a 4.7 truck for sale that didn’t need head gaskets or have overheating issues.
Because people don’t know how to manage the proper maintenance on em , you can easily find 4.7 at 300000+ miles while the hemi at 150k already has a wiped out cam
Agreed. My 4.7 never failed me in 5 years and I put it through good use. I think they’re solid engines, just lacking power for that size of truck and especially if you do consistent hauling. It goes both ways though. My Dad’s 5.7 has 220k on it and still runs like a dream. Maintenance and operation are key
I bet this was a school project…
I don’t know of any pre-med degrees that require engine work or welding
hemi 👎 neice job, but no one will appreciate it. useless.