1gn r/t head,intake,etc. on a 2002 se...possible...?

02goldse · Post by **02goldse** » Tue Nov 11, 2008 10:18 pm

well guys now is the time i need break open the piggy bank i guess.

there is a 1gn rt in our local yard with the whole engine assembly in it. i was wondering if i took that out which at our yard 4cly. motors are $75 yes 75 would everything bolt up like the head and everything because if this is possible im going out bright and early to pull the engine...another question woul i need to keep the header and everthing to or can i use my 02 one..?

if there is a write-up on here explaining this process or someone comes across this thread and knows what i need and what i have to do please let me know..

from what i understand any r/t head will bolt up but i want to get the manifold and all that happy stuff but guys help me out so i can get this asap b4 it is gone....

not really sure if i want to do this.but if i get good responses i will but if not its another project scrapped..

Donkeypuncher · Post by **Donkeypuncher** » Wed Nov 12, 2008 12:05 am

That's a tough question. I know the 1g r/t is the dohc 420a motor as opposed to our sohc r/t. The head should bolt up fine, but the timing belt is different as well as the pcm. I would think it's possible if you swap the engine wiring harness as well, but I couldn't say for sure. I think there was some info on the .org about a dohc head swap, but I can't find it at the moment.

02goldse · Post by **02goldse** » Wed Nov 12, 2008 12:13 am

i cant find it either

Donkeypuncher · Post by **Donkeypuncher** » Wed Nov 12, 2008 1:04 am

This is the only post I could find on here about the swap: viewtopic.php?t=34470

It sounds like it will work, but there might be a few modifications that need to be done. It seems the coolant sensor would need to be lengthened, but all the sensors should work fine. I'm wondering about the intake manifold, do you use the 1g or the 2g. And if you use the 1g, are the sensors the same for the throttle body?

Not a lot of info about this kind of swap, probably because most people opt for the srt swap.

02goldse · Post by **02goldse** » Wed Nov 12, 2008 9:01 am

so what if i jsut do the whole r/t motor swap..would it just be eaiser..? then i guess i would use any dohc pcm and the harness but mount wise would i just use the 02 mounts or no..?

Post by **occasional demons** » Wed Nov 12, 2008 9:54 am

Pull the MTX also. Very good chance of it being the 3.94 ratio prolly a guarantee as it's an R/T. Unless it's an ATX. I don't think the MTX only in R/T's/DOHC applied for the 1gn's. The whole harness can be swapped, but I'm not sure how much work is needed to get it to work with the 2gn interior. I know 2gn clusters have been in stalled in a 1gn car, but that was an SRT swap. But yes it will all swap, you would just need all the DOHC timing gear/brackets/exhaust mani or header, etc. The fun part is getting the electronics figured out. But turboing it will be a little easier as the OEM mani will be a bolt on. I'm not 100% sure on the IM side as to what fits/can be made to fit. I think with some mods the SOHC IM can be made to fit the DOHC.

02goldse · Post by **02goldse** » Wed Nov 12, 2008 10:32 am

well there is some good info for me to run with but this is going to be an ongoing process and hopefully over winter break from college ill be able to start this swap... or what about and mtx r/t tranny swap..? how would that go about like what would i need..? cuz i dont want to scrap all my mods on my 2.0 in my car now...

Post by **occasional demons** » Wed Nov 12, 2008 12:07 pm

Hmmm, if you have an ATX, then the speedo sender has to be worked out. there have been a few here that have put the MTX into '02-up ATX cars, but I haven't seen/read if they ever got the speedo/VSS to work properly. As far as mods, swapping to an MTX shouldn't have anything but positve results for them. Now swapping the head may take some reworking of a CAI to get it to work with whatever IM you use. You will need new plug wires for the DOHC also. (unless you don't mind the SOHC ones sticking up too high)

02goldse · Post by **02goldse** » Thu Nov 13, 2008 2:53 am

well im not doing the head swap im doing a tranny swap now because its too much trouble..but if ne1 finds tinks write up about his mtx swap post me the link cuz i cant find it newhere

Post by **occasional demons** » Thu Nov 13, 2008 8:39 am

Meh, still get the head/related parts for the swap and sell them on here, Heck if you can get the whole motor for $75 then you could easily make some cash to help pay for the MTX swap. I'm sure some one would pay at least $150-200? for complete head swap parts.