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engine swap 4.7 to 5.7

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  #1  
Old 08-10-2007, 09:29 PM
wardog wardog is offline
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Default engine swap 4.7 to 5.7

I own a 2002 dodge ram 1500 4x4 with a 45rfe trans 4.7l and my engine is dead but the trans is great. I would like to put a 5.7l hemi in it but i need to know if this will work before i buy a hemi. I have been told that all dodge small blocks have the same bell housing bolt pattern, is this true???????

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  #2  
Old 08-10-2007, 09:37 PM
Jr. Mechanic Jr. Mechanic is offline
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Default RE: engine swap 4.7 to 5.7

Bell housing should be the same, but you will also need the pcm, wiring harness, possibly motor mounts, and some other things. Shouldnt be too bad of a job though.
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Old 08-10-2007, 10:02 PM
OldMoparMan OldMoparMan is offline
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Default RE: engine swap 4.7 to 5.7

Take a nap instead.....

If you took the money that would be involved in buying the engine and all the necessary parts like sensors,ECU, manifolds,exhaust and what notto make it a flawless, reliable vehicle, it would be a nice downpayment on a new Hemi truck.

OR

You happen to come across a killer deal of a wrecked Ram WITH a Hemi already in it. And those days are all but gone, anyway.....
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Old 08-10-2007, 10:11 PM
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Default RE: engine swap 4.7 to 5.7

Rebuild the 4.7, would be a lot cheaper, and as you're doing it you can do some things to get added power out of it like cam, headers, etc...
Won't be a Hemi, but it could still be an asskickin' powerfull ride...
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Old 08-10-2007, 10:15 PM
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Default RE: engine swap 4.7 to 5.7

I have thought about a rebuild but I am able to pick up a 5.7 hemi for 1800 bucks so I am still headed that way. My last resort is to do a rebuild.
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Old 08-10-2007, 10:45 PM
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Default RE: engine swap 4.7 to 5.7

Unless the 4.7 was put into your 2002 aftermarket you had a 5.2 or a 5.9. 2002 options were V6, 5.2 and 5.9.

One of the above posts is correct. You are better off getting rid of your truck, use the money on a new or newer truck.
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Old 08-10-2007, 11:03 PM
OldMoparMan OldMoparMan is offline
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Default RE: engine swap 4.7 to 5.7

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ORIGINAL: 94rt10ohio

Unless the 4.7 was put into your 2002 aftermarket you had a 5.2 or a 5.9. 2002 options were V6, 5.2 and 5.9.

One of the above posts is correct. You are better off getting rid of your truck, use the money on a new or newer truck.
Not completelytrue. I have a 2002 with a 4.7, MFG'd January of 2002.

http://www.automotive.com/2002/09/do...500/index.html












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  #8  
Old 08-11-2007, 12:16 AM
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Default RE: engine swap 4.7 to 5.7

exactly...the 5.2 was canned in favor of the 4.7

but you'd be better off to rebuild it or put a down payment on a newer truck.....too much cost involved in doing that type of swap when you figure in the computers and all that **** your gonna need to make it work
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Old 08-11-2007, 01:03 AM
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Default RE: engine swap 4.7 to 5.7

Quote:
ORIGINAL: wardog

I have thought about a rebuild but I am able to pick up a 5.7 hemi for 1800 bucks so I am still headed that way. My last resort is to do a rebuild.
Welcome to da forums,

The easiest way would be a rebuild with lots of HP extras added as you go thru the 4.7, however...

$1800 is a good price and I can see why that is drawing you to it, but what condition is the hemi in?

If you have the cash - time - tools - access to crunched rams - and will power to make it work, I say go for it.

Oh and either way post pics cuz we love pics here.
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  #10  
Old 08-11-2007, 07:41 PM
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Default RE: engine swap 4.7 to 5.7

I have decided that I am going to take everyones advice and rebuild my engine with hp parts.
I would like to thank everyone for their input.

Wardog
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Old 08-11-2007, 08:49 PM
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Default RE: engine swap 4.7 to 5.7

Me thinks that is a wise decision, It's tempting when you can get a Hemi for that price, but I don't think you fully understand ALL the other components you'd need. Good Luck with the re-build and keep us up-to-date...
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Old 08-12-2007, 11:41 PM
ttuguy1983 ttuguy1983 is offline
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Default RE: engine swap 4.7 to 5.7

http://cgi.ebay.com/ebaymotors/03-05...QQcmdZViewItem

saw this. thought you might like to see. looks like this guy can get you everything you need including the 5 speed auto for about 3000 grand. looks like a once in a lifetime deal. Or it could be opening up a can of worms trying to get it to work.
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Old 08-12-2007, 11:50 PM
HighDuke1911 HighDuke1911 is offline
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Default RE: engine swap 4.7 to 5.7

Well, put in a new tranny (Allison), brand spankin' new headers, CAI, plugs, etc... Do it all. Just go for the gold with modding the crap out of the truck now. And do not forget to put a HEMI badge on there.
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  #14  
Old 08-13-2007, 01:03 AM
ttuguy1983 ttuguy1983 is offline
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Default RE: engine swap 4.7 to 5.7

3 grand buys alot of beer too. lol
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  #15  
Old 08-15-2007, 12:26 PM
wardog wardog is offline
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Default RE: engine swap 4.7 to 5.7

Thanks for the info
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  #16  
Old 08-15-2007, 01:03 PM
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Default RE: engine swap 4.7 to 5.7

Id go for the engine swap, even when you add in all the extra parts you need to convert it to a hemi it will still be about the same price as the rebuild with all performance parts. And even with all the performance parts it still would only end up with about the same amount of power as a very lightly modded hemi. It just seems like a waste of money to do a rebuild.

Now on the other hand if you were to do the rebuild but only do it back to stock parts (save you alot of time and money for parts) and buy the hemi as well and work on it every now and then until it is built up and is a complete power house and stick it in at a later date that would deffinatelywork in my book...

Also how did the engine die? What exactly happened to it? And can it be rebuilt? Depending on the damages it may not be able to be rebuilt and then you would be kicking yourself for not buying the Hemi. $1800 is dirt cheap (if it is working).
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Old 08-15-2007, 01:48 PM
ttuguy1983 ttuguy1983 is offline
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Default RE: engine swap 4.7 to 5.7

if you surpass even an unmodded hemi in terms of power with a 4.7 your spending some serious cash. there is a huge difference in power to the between the 4.7 and 5.7. It'll take alot to get there. And then youd run up against a hemi with a comp cam and be in trouble. or better yet, one with forced induction.
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Old 08-15-2007, 01:57 PM
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Default RE: engine swap 4.7 to 5.7

Quote:
ORIGINAL: ttuguy1983

if you surpass even an unmodded hemi in terms of power with a 4.7 your spending some serious cash. there is a huge difference in power to the between the 4.7 and 5.7. It'll take alot to get there. And then youd run up against a hemi with a comp cam and be in trouble. or better yet, one with forced induction.

that being said, there is the fact too that your hooking it to a tranny that may be a good one, but not one that was designed for the motor. The weakest link will go next, so if there is any flaw or wear issue, that hemi will find it for sure. then there are other components that will be effected the same way. good luck on the rebuild.
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Old 08-15-2007, 02:15 PM
ttuguy1983 ttuguy1983 is offline
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Default RE: engine swap 4.7 to 5.7

exactly. i'm looking for a cam now, but i think im going to beef m tranny up a bit before i instal anymore performance parts. I dont know about the rest of you, but i'd hate to take it in to try to repair the tranny under my exstended warranty and have them say NO! "your transmission failed because of non oem parts and modifications."
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Old 08-15-2007, 02:15 PM
 
 
 
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02, 1500, 2002, 2004, 47, 47l, 57, 57l, 59, challenger, dodge, engine, hemi, ram, rebuilding, swap

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