2012 Durango 392 Swap

5853 Views 67 Replies 7 Participants Last post by Tim M, 9 mo ago

Tim M

Discussion Starter · 12 mo ago

4

Well I have a 2012 Durango RT that I purchased and quickly (like a week later) it developed the Hemi tick. So rather than cam and lifter that, I have purchased a 392 out of a 2012 SRT8 Chrysler 300 to put in it. I have the old 5.7 out and the transmission and torque converter mounted back up to the 6.4. I also have my short runner lock out that I purchased from MMX, on the back of the intake manifold...I just got my Jeep SRT8 Exhaust manifolds today so I can start moving forward with getting this engine back in the Durango. I am doing this project on my own and in my own garage so it is taking me a little time however I have been pretty motivated to get this up and running. Appreciate any suggestions or comments.

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Tin Foil Hat

· #2 · 12 mo ago

What and why did you weld onto the flywheel?

Reactions: 4

Tim M

Discussion Starter · #3 · 12 mo ago

2

Tin Foil Hat said:
What and why did you weld onto the flywheel?

Lol,, there is a pilot bushing that is in the 6.4l cars... that the torque converter fits into that bushing has to be removed for the Durango torque converter and transmission to mount up too.

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the one without the bushing is the old 5.7,the one with is my 6.4L

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Tim M

Discussion Starter · #4 · 12 mo ago

That pilot bushing has been the worse part of this process up until this point. I tried everything to get it out... pullers.. the grease trick.. the bread trick... nothing worked I even bought a 1 inch pipe tap to try that but it didn’t work either... I ended up buying a small flux welder for about $150 bucks and that worked.... along with a slide hammer

Centex16

· #5 · 12 mo ago

Sawzall? I'm being semi serious. Cut through it almost all the way and then tap it out with a cold chisel.

Tim M

Discussion Starter · #6 · 12 mo ago

Centex16 said:
Sawzall? I'm being semi serious. Cut through it almost all the way and then tap it out with a cold chisel.

Well that welder and the slide hammer worked... I could not think of a way to grind that sucker down to hit it with a chisel,, just couldn’t get to it with the Sawzall.. plus I didn’t want to damage the crank.. so kinda had to be careful..

StuckOnDurango

· #7 · 12 mo ago

Tim M said:
That pilot bushing has been the worse part of this process up until this point. I tried everything to get it out... pullers.. the grease trick.. the bread trick... nothing worked I even bought a 1 inch pipe tap to try that but it didn’t work either... I ended up buying a small flux welder for about $150 bucks and that worked.... along with a slide hammer

I gotta ask.... what is the "bread trick"?

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Tim M

Discussion Starter · #8 · 12 mo ago

Ha,,, well it’s the hillbilly trick that actually works if your getting out a pilot BEARING as in if you have a standard shift vehicle That has a needle bearing in the crank shaft,, and in some cases it will work with a bushing... fill the hole full of bread then use a socket or something that Fits perfect in the hole and beat it in there with a hammer

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Tim M

Discussion Starter · #9 · 12 mo ago

2

Exhaust manifolds are on and this thing is almost ready to drop back in. Note ( DO NOT put the starter and motor mounts back on until AFTER you put the exhaust manifolds on) because even with the engine out of the vehicle this costed me time. Bottom bolts are very hard to get to.

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Tim M

Discussion Starter · #10 · 12 mo ago

Once I get this engine in I am having trouble deciding on an exhaust system for it... I think I am gonna go with stainless works cat back system.. I really wanted flowmaster but I dont think they make one in 3 inch for the Durango.. I looked for 2018+ SRT Durango flowmaster system and can’t find one.. At least if they do I can’t find it.. I suppose I could take it to an exhaust shop and have theM bend up a system with flowmasters for it.. However if I buy the stainless works cat back I can just bolt it up myself.

kevinski118

· #11 · 12 mo ago

I vote for custom exhaust. You've come this far, right?

I went with a kooks 3" mustang h pipe, flowmaster outlaws, and srt tailpipes. I don't have a pipe bender so cutting and welding helped get around that. Just an idea

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Tim M

Discussion Starter · #12 · 12 mo ago

Good idea, thanks.. I am gonna kick it around for a few. I am pretty excited to get this 392 engine back in there this weekend... then that exhaust will be my only real issue.

Tim M

Discussion Starter · #13 · 12 mo ago

3

Well with some help from my son and my wife I got this engine in and now I have to finish all the little stuff and figure out that exhaust system

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Tin Foil Hat

· #14 · 12 mo ago

You have a very interesting way of lifting a motor and trans.

Tim M

Discussion Starter · #15 · 11 mo ago

Well that second strap helps me keep the tail of the transmission high enough where I could get it in and not grab any power steering lines or other lines whiles pushing it back in place ... it actually worked out well. I could raise and lower the transmission without raising and lowering the engine.

Tin Foil Hat

· #16 · 11 mo ago

Yes, pretty smart. I presume the yellow one is to avoid trying to lift from the plastic intake?

Tim M

Discussion Starter · #17 · 11 mo ago

Correct, I have it wrapped All the way around the bottom of the motor then back up the other side... I just removed a coil pack from each side so I didn’t damage those... I just wanted it secure since the only help I had was my son and I surely didn’t want it getting loose. Oh and I definitely didn’t want to damage my new headlights.. ha

11srtclone

· #18 · 11 mo ago

Tim M said:
Well I have a 2012 Durango RT that I purchased and quickly (like a week later) it developed the Hemi tick. So rather than cam and lifter that, I have purchased a 392 out of a 2012 SRT8 Chrysler 300 to put in it. I have the old 5.7 out and the transmission and torque converter mounted back up to the 6.4. I also have my short runner lock out that I purchased from MMX, on the back of the intake manifold...I just got my Jeep SRT8 Exhaust manifolds today so I can start moving forward with getting this engine back in the Durango. I am doing this project on my own and in my own garage so it is taking me a little time however I have been pretty motivated to get this up and running. Appreciate any suggestions or comments. View attachment 121769 View attachment 121766
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Hey so I’m doing the same swap on my 11 now this weekend. I see the trans doesn’t mate at the bottom. What did you do for that ?

Tim M

Discussion Starter · #19 · 11 mo ago (Edited)

Well, there is a small cover plate the closes Up that access to the flywheel...from the 6.4, that the 5.7 does not have. I will figure out how to put that on the bottom of the transmission and as for the two bottom bolts In the transmission I‘m not sure yet I have to look at it some more to figure that out. Kinda still stuck on the exhaust issues... but I can fix those bottom bolts on the transmission while it is in the truck. Did you use your starter and cover plate from your 5.7? I would assume you did since your using the transmission

11srtclone

· #20 · 11 mo ago

I will be reusing the starter . As of now I have the old motor out and trans out. We were going to install it all today but the trans held us up. Did you just bolt the top half and use the 5.7 trans gasket instead of the 6.4 ? Did that close the gaps on the side where it’s a different shape ? I want to drop it in tomorrow but don’t want to have to pull it back out . I went with long tube stainless works headers and mids .

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