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 swapping in an 3.8 "Endeavor" engine
#1076787
02/14/15 11:07 PM
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Joined: Feb 2000
Posts: 3,269
OP
Roll Me Over
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I'm thinking of attempting this swap...Used 3.5's are hard to find and expensive.
Its seems as though the 3.8 non mivec engines out of endeavors are a dime a dozen..anywhere between 500-700 bucks. As far as I can tell by researching its the same block as the 3.5 but factory stroked and bored. Same heads as the 3.5 SOHC.
My current engine has a new set of heads but a knock down low, so was contemplating getting a 3.8 out of an endeavor and using the bottom end only.
I know Old Colt did this with a 95 taking a galant 3.8 and swapping on the 95 DOHC heads and accessories so, should work in a SOHC as well..or so the theory goes.
I know it would be easier to go like for like, but if I can gain a little for for less $$ it might pan out.
Thoughts?
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: swapping in an 3.8 "Endeavor" engine
[Re: justice]
#1076788
02/15/15 12:00 AM
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Joined: Jul 2002
Posts: 1,758
Body Damage is Cool
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I like this topic. Hmmm... I don't know enough about the endeavor to know the difference. I guess I'll be doing a little research over the weekend.
89 Raider - V6, Automatic, rear LSD, A/C Retrofit, Cruise Control Retrofit.
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Re: swapping in an 3.8 "Endeavor" engine
[Re: Jay Ayala]
#1076789
02/15/15 01:39 AM
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Joined: Dec 2007
Posts: 2,348
Body Damage is Cool
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I swore Toasty has already researched this and it will work. It is a stand alone engine, you wouldn't need the trans to go with it , so it is basically a wiring swap. I think. <img src="/forums/images/graemlins/scared.gif" alt="" />
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Re: swapping in an 3.8 "Endeavor" engine
[Re: justice]
#1076790
02/15/15 01:43 AM
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Joined: Dec 2007
Posts: 2,348
Body Damage is Cool
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I'm thinking of attempting this swap...Used 3.5's are hard to find and expensive.
Its seems as though the 3.8 non mivec engines out of endeavors are a dime a dozen..anywhere between 500-700 bucks. As far as I can tell by researching its the same block as the 3.5 but factory stroked and bored. Same heads as the 3.5 SOHC This dime a dozen thing is not happening here in Jax FL. All of the Mitsu's here seem to get bought up and shipped to Central America and south for parts. There are a couple my that don't do that, but they are in the minority.
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Re: swapping in an 3.8 "Endeavor" engine
[Re: Mudraider]
#1076791
02/15/15 06:03 AM
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Joined: Feb 2000
Posts: 3,269
OP
Roll Me Over
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The endeavor engines on the net, and local are cheap. If I do it, I plan to use my heads on the 3.8 block so no wiring to do. From what I've researched all outside dims are the same on the 3.5/3.8. Might have to grind a few bosses down on the block to get the brackets all to bolt on correctly.
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: swapping in an 3.8 "Endeavor" engine
[Re: justice]
#1076792
02/15/15 02:41 PM
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Joined: Dec 2007
Posts: 2,348
Body Damage is Cool
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The endeavor engines on the net, and local are cheap. If I do it, I plan to use my heads on the 3.8 block so no wiring to do. From what I've researched all outside dims are the same on the 3.5/3.8. Might have to grind a few bosses down on the block to get the brackets all to bolt on correctly. So this means the ignition system is basically different, which is what would require a completely different wiring set-up? And if you had a V6 truck, the 3.8 physically bolts in, it would just be a matter of wiring, ECU change?
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Re: swapping in an 3.8 "Endeavor" engine
[Re: Mudraider]
#1076793
02/15/15 07:02 PM
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Joined: Feb 2000
Posts: 3,269
OP
Roll Me Over
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I plan on possibly doing this swap into a 99 with a 3.5 SOHC, and using my existing heads and entire intake, so no plans to modify any wiring.
Basically what im trying to do is buy the 3.8 and use it like a short block and bolting everything externally from the 3.5 SOHC onto it before swapping it in.
How will the 3.5 ECU react to the extra .3 liters of diplacemnt? I dont know, but I think it should be fine as charlie used the Factory ECU on his 3.8 galand engine swap and reported good results.
Last edited by justice; 02/15/15 07:07 PM.
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: swapping in an 3.8 "Endeavor" engine
[Re: justice]
#1076794
02/16/15 05:13 AM
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Joined: Jan 2014
Posts: 295
Mudrunner
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If you go this route and end up curious how the engine is running, just slap in a wideband o2 sensor and get readings of your ratios.
My guess is it will run a hair leaner than a 3.5, but some engines like jeep 4.0 run like that stock for 300k miles.
88 Montero, StarQuest turbo, Kormex 5speed +tuff-pan w/phoenix f. stage2 clutch, 4in lift+33' tires, 4.875 lsd, short-throw shifter, Aisin hubs, SR big brakes, gen2 uca's, elantra alt, and so much more... 16g turbo w/hardpipes + 4.90 locking disk-brake axle soon (maybe lsd or aussie front??)
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Re: swapping in an 3.8 "Endeavor" engine
[Re: Malykaii]
#1076795
02/16/15 04:47 PM
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Joined: Jan 2002
Posts: 6,134
Trail Leader
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I really like this idea, i ended up scoring a great deal on a low milage 3.5 SOHC so i never attempted the swap. I was going to run just the intake and things from my 3.5 on the 3.8 and then since i have a late model Gen 2 it has a programmable ECU so i was going to have it tuned as well. I would think it would just work as is though. Go for it and document the process. <img src="/forums/images/graemlins/kewl.gif" alt="" />
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