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Discussion Starter #1
I have a 94 with a manual 5 speed NV4500. The 5.2 that is in it is pushin 126k miles and I would rather upgrade than simply rebuild when the day comes. I just bought the wife a 98 Jeep Grand C that has the 360 in it and have fallin in love with all that power.
Question is: Has anybody done this conversion? Will it bolt right up to my Manual (I would hate to have to go to a auto trans.). What about the wiring harnesses, computers, all of the "extras" like the PS pump, AC pump ect...can I simply take them off of the 5.2 and slap them on the 5.9? Anyone want to take a guess at how much this conversion would cost? You get the idea....Anybody have any experiance or ideas?
 

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You wont have a problem getting the tranny to bolt up. If the new engines are like the old... its basically the same block just a little bit different of a configuration. You would need to change the appropriate electronics though (ie. computer, injectors, etc) One more thing to worry about is smog. depending on what state you live in, you will have to make sure it is all smog legal, otherwise youre gonna have to keep that 5.2 around to swap in when the checkup time comes around. your "extras" should bolt right up also. you might as well upgrade the engine while you have it out. mopar has some R/T heads that would help out nicely. raise the compression to a healthy 9.5:1. The total cost shouldnt be more than just the price to rebuild an engine plus a little for the core since its not the exact same block, blah blah. i would guess if you go cheap as possible you could do it for well under $2000. Let us know what you decide.
 

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The 318 and 360 blocks are the same thing. From the outside there is no way to tell the difference between the two engines.
Everything from one should bolt on to the other.
The only issue I could see is that the 360 may have bigger fuel injectors and a different computer from the factory. I dont know if they really do or not but they should.
 

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I think it would better to rebuild the 318. My 318 has 172k miles on it and it shows no sign of stopping because the 318 is a bulletproof engine. I have expierience in rebuilding engines and I think it would be the best way to go since in emissions states its illegal to swap the original engine for a bigger one. The last engine I rebuilt I was able to squeeze out 30 extra hp just by boring, port and polish, and putting in some performance parts. Swapping wouldn't be a bad idea but rebuilding does have its advantages.
 

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Discussion Starter #5
Thanks for the input guys. I will be moving to VA so the smog thing is bye bye. (I have thought about wrapping a chain around my CC and to the "Welcome to California" sign on my way out and driving off. <IMG SRC="/board/images/smilies/icon_smile.gif">.
I know I can tweek the 5.2 but in teh end you still have a 5.2. there is no comprimise for cubic inches. well, maybe nos...<IMG SRC="/board/images/smilies/icon_smile.gif">
right now the motor seems healthy minus a pesky low oil pressure. It tends to fluctuate at idle, sometimes reading 1/4 pressure. As soon as I tap the gas it will come back up but after it sits at idle for a bit it will go back down. Really doesn't give me the warm and fuzzies.
On the flip side, I wouldn't mind getting a replacment 5.2 to nickle and dime until the one thats in dies. I think it would be fun to tinker on one and gradually as time and money permits, build a real bulletproof motor. When the time comes, slap it in and bolt everything right up. Could be fun. <IMG SRC="/board/images/smilies/icon_smile.gif"> But tough to do when you live in an apartment. <IMG SRC="/board/images/smilies/icon_razz.gif">
thanks for the help guys.
 

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Actually if you bore a 318 its bigger displacement than it was before <IMG SRC="/board/images/smilies/icon_smile.gif">
 

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On 2001-12-04 11:27, Bill_L wrote:
The 318 and 360 blocks are the same thing. From the outside there is no way to tell the difference between the two engines.
Everything from one should bolt on to the other.
The only issue I could see is that the 360 may have bigger fuel injectors and a different computer from the factory. I dont know if they really do or not but they should.

they arent the same motor. the 318 is internally balanced and the 360 is externally balanced. so to make the switch you would have to get a new flexplate or flywheel(depending on auto or manual tranny) and the correct harmonic balancer. and if you look at the drivers side of the block it says 318 or 360.
 

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On 2002-01-05 10:23, Anonymous wrote:
Why would you want to do the swap to get 15hp and 30pds of tq. Just rebuild with some head work headers and good exhaust and you wount be worring about a 360 anymore

never heard the saying, "theres no replacement for displacement!"
you could do a stroker kit to both. could make the 318 a 380'ish, and the 360 a 406'ish(i dont know the exact numbers but i know it is possible and will cost about 2,000 bucks for the parts or 4,000 for a short block.
 
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