[mitak1]

I'm looking at replacing my 4.7l V8 motor which has catastrophically failed. Im looking for a good company to buy a remanufactured motor from. Anyone have any good information? Thanks very much!

[landmarkbuilder]

had to get a 4.7 for my 2002 Ram last halloween. I got it from ATK engines for $2400 and change. Good motor, warranty of 3 years, unlimited miles. Just have to find a good mechanic then, or do it yourself. Not sure how the warranty would work out if it is self installed though

[Rickyb]

screw the 4.7, go with the 5.9 or at least the 5.2.

[horatio102]

Why would he want to take a step backwards?

Please... the Magnum engines have a ton more problems than the 4.7s while offering similar power levels at lower fuel economy.

[Rickyb]

Originally Posted by horatio102

Why would he want to take a step backwards?

Please... the Magnum engines have a ton more problems than the 4.7s while offering similar power levels at lower fuel economy.

never had one problem with my 5.2, 150k miles, no major engine service done ever.

[landmarkbuilder]

Not that simple if it already has a 4.7 (nothing in profile). Computer and all sorts of stuff would need changed i believe

[horatio102]

Originally Posted by Rickyb

never had one problem with my 5.2, 150k miles, no major engine service done ever.

Fantastic. You might have issues you don't know about.

I'm at 147k with no problems on my 4.7 so far.

The Magnum series of engines - 3.9/5.2/5.9 don't have hardened valve seats and crack the heads between the valves. This is a well documented and common problem. They also have a stamped tin intake plenum cover that tends to blow gaskets, causing pinging, oil consumption, poor fuel economy, etc.
My 5.9 Dakota required the intake plenum gasket to be fixed at about 45k miles and again at 65k miles, and the heads had to be replaced at 115k miles. 5 out of 8 cylinders had cracks between the valves that were visible to the naked eye.


They're extremely old designs, dating back to what, the mid-50's? It's old technology. Great engines to build for low-tech power, but they're not better than the current series of engines by any means.

And yes, switching would require a new transmission, new ECU, new wiring harness. It's not as simple as just bolting up and being done with it.

[xJoshxx]

the 4.7 puts out more than 5.2 and the 4.7HO puts out more than the 5.9 with less displacement and better MPG.

[horatio102]

Shhhhhh! Dont get those 5.9 fanbois started. They refuse to admit that the 5.9 is slower to 60 than the 4.7 HO...


When my 4.7 needs replacement, I'm tempted to try and pick up a 2010 Ram 4.7 and ecu to stuff in my jeep. 300+ hp and torque would be nice.

[landmarkbuilder]

When my Ram 4.7 died, it had 165,000 miles. It died due to a timing chain jumping. More than enough power for a big tug boat like a ram QC 4x4, so i can imagine it is a hot rod in a GC. Now, how can i get that in my TJ......

[xJoshxx]

Originally Posted by landmarkbuilder

When my Ram 4.7 died, it had 165,000 miles. It died due to a timing chain jumping. More than enough power for a big tug boat like a ram QC 4x4, so i can imagine it is a hot rod in a GC. Now, how can i get that in my TJ......

Mopar makes a DIRECT swap in 4.7 Inline 6 Stroker now.

http://www.jeepforum.com/forum/f19/mopar-4-7l-stroker-772587/

[horatio102]

If they can stuff a 5.7 in the TJ, the 4.7 will fit in easy.

I don't know why Dodge doesn't do more with the 4.7


SRT8 Wrangler where a friggin 400+hp engine would be just stupid, but a 300hp engine would make things fun

IMHO it would go nicely into the sedans too - or into the compacts as an SRT8 variant. Forget about the SRT6, just go straight to a decent v8.

If they used it in more vehicles, there would be more demand for aftermarket stuff.

[Jeeples]

Originally Posted by horatio102

If they can stuff a 5.7 in the TJ, the 4.7 will fit in easy.

I don't know why Dodge doesn't do more with the 4.7


SRT8 Wrangler where a friggin 400+hp engine would be just stupid, but a 300hp engine would make things fun

IMHO it would go nicely into the sedans too - or into the compacts as an SRT8 variant. Forget about the SRT6, just go straight to a decent v8.

If they used it in more vehicles, there would be more demand for aftermarket stuff.

I have the HEMI in my '09 Charger and a 4.7 in my wife's WJ, and the 4.7 is much wider than the HEMI. It would be a snug fit in a fullsize car like the Charger, but there is no way that the 4.7 would fit in a SWB Jeep. Think about, the reason there are no headers for WJ's is due to lack of space between the frame rails, how are you gonna fit that engine in a vehicle that is even narrower?

Good luck fitting the 4.7 in a mid-size or compact car, from the get go it was never designed to fit in anything less than SUV's or trucks, plus the iron block would just add more weight to the front of the vehicle, severly affecting handling, which is something the SRT guys strive for.

[keith20mm]

Rebuilt Engines - Engine Rebuilders - Engine Restoration Services

You won't be unhappy.

[horatio102]

Originally Posted by Jeeples

I have the HEMI in my '09 Charger and a 4.7 in my wife's WJ, and the 4.7 is much wider than the HEMI. It would be a snug fit in a fullsize car like the Charger, but there is no way that the 4.7 would fit in a SWB Jeep. Think about, the reason there are no headers for WJ's is due to lack of space between the frame rails, how are you gonna fit that engine in a vehicle that is even narrower?

Good luck fitting the 4.7 in a mid-size or compact car, from the get go it was never designed to fit in anything less than SUV's or trucks, plus the iron block would just add more weight to the front of the vehicle, severly affecting handling, which is something the SRT guys strive for.

It's lighter than the 5.2/5.9, but I'll give you that it's a fairly wide engine. The Hemi is an iron block as well though, which I don't hear too many SRT guys complaining about...