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Unread 08-26-2011, 10:50 PM   #1
Wrangler11
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possibly trading for a 89 YJ

I need some advice guys. There is a guy on craigslist with an 89 YJ. It looks amazing from the pictures. 4" lift with 33s. The biggest problem is the engine is blown. It had a 2.5L in it. I have an 97 Acura CL 2.2 that I was considering trading for it. I really do not want a huge project on my hands. How difficult is it to swap another 2.5L in? Is there a better solution other than the 2.5L that will not be a huge project?

http://chicago.craigslist.org/nch/pts/2566929709.html

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Unread 08-26-2011, 11:02 PM   #2
giggityjeeper
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another 2.5 would be easy peasy..... but most will say its underpowered.....I have a carbed 4.2 and LOVE it BUT.... its carbed and has its limits, and living where in winter it hits -45, it is not a happy carb either

about the only advice I will say... after having my YJ for 7ish years.... spending more F#$@#%ing $$ on it then I will ever tell my GF.... doing a SOA, highsteer, many manymods to the engine.... IF and IF I were to start all over again, I would get aYJ with a 4.0


and THAT would be my only thing I would change... so take taht for what its worth.... If your gonna do anything with it outside of pavement, the 2.5 is not gonna work for ya without some steep steep gears

maybe phone him and offer a grand, it after all dotn have an engine and WTF you have almost 2000 posts and you dont even own a jeep.....I R confused
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Unread 08-26-2011, 11:13 PM   #3
tommbstone
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I'm the new noob but I'd say NO get a 4.2 (258) or the 4.0 say 91-92. Having said that my 89 carb 258 has a lot more power than my buddys 91 HO 4.0. I just saw a 258 with howell kit on another site for about 2k all fresh engine too.
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Unread 08-26-2011, 11:13 PM   #4
jhumphrey
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Quote:
Originally Posted by Wrangler11 View Post
I need some advice guys. There is a guy on craigslist with an 89 YJ. It looks amazing from the pictures. 4" lift with 33s. The biggest problem is the engine is blown. It had a 2.5L in it. I have an 97 Acura CL 2.2 that I was considering trading for it. I really do not want a huge project on my hands. How difficult is it to swap another 2.5L in? Is there a better solution other than the 2.5L that will not be a huge project?

http://chicago.craigslist.org/nch/pts/2566929709.html
I have an 89, 4.2L engine. I would have some questions for him. But, lets pause for a minute. Swapping in another 2.5 engine would be relatively easy, but its going to cost you some money. Plus, it will take you a weekend to get the swap done (if you're mechanically inclined and have all the tools/space you need).

Now, the other issue I have is not being able to drive it. How do you know that 4" of lift was properly done? You dont. You could get it and the lift be totally jacked up....more money to make it right.

You'll also want a 4.0/4.2 engine. 4" of lift and 33" tires is hard on a 4cyl engine. Then there's gear ratio...to (numerically) low and it wont rotate those 33" tires, to high and you'll blow an axle (presuming it has a dana 35 rear)....to many questions that cant be answered.

Id shy from this and find a running one to talk trade.
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Unread 08-26-2011, 11:15 PM   #5
FirefighterRobT
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I have an 89 YJ with a Chevy 350... So I kinda have to go with that Lot's of power, and parts are in every junk yard, should I need it.
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Unread 08-26-2011, 11:37 PM   #6
Wrangler11
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Quote:
Originally Posted by giggityjeeper View Post
another 2.5 would be easy peasy..... but most will say its underpowered.....I have a carbed 4.2 and LOVE it BUT.... its carbed and has its limits, and living where in winter it hits -45, it is not a happy carb either

about the only advice I will say... after having my YJ for 7ish years.... spending more F#$@#%ing $$ on it then I will ever tell my GF.... doing a SOA, highsteer, many manymods to the engine.... IF and IF I were to start all over again, I would get aYJ with a 4.0


and THAT would be my only thing I would change... so take taht for what its worth.... If your gonna do anything with it outside of pavement, the 2.5 is not gonna work for ya without some steep steep gears

maybe phone him and offer a grand, it after all dotn have an engine and WTF you have almost 2000 posts and you dont even own a jeep.....I R confused
LOL I've had several jeeps. A tj, 2 YJs, 2 Grand Cherokees, Cherokee, and a CJ7. RIght now I'm building a Land Rover Discovery, but will really like to get another wrangler. I have an Acura CL that I'm trying to trade for one.
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Unread 08-27-2011, 09:02 AM   #7
raynmaker
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since it had a 2.5 it will have the 4:10 gears stock. Putting a 4.0 or 4.2 would be the best route. I personally would go with the 4.2 and add TBI like howell. I say this because it would make wiring easier than trying to wire a 4.0. There are threads to converting from 2.5 to 4.0 so you would have lots of help there.
Good luck
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Unread 08-27-2011, 09:23 AM   #8
MDonovan8
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A few questions arise when reading all the posts. When you say "blown engine', is the crank broke, rod thru the side of the block, mains shot? It sounds like you have mechanical experience if you are building a Land Rover, so rebuilding that engine is also an option, but a 2.5 pushing 33's, that's a big strain. If you drive around town and light off road maybe, but if you put that on the highway, all bets are off. Being in Chi Town, how is the frame and rust on the Heep. It seems like the the Heepers that love their 4.2's live in warm climates, don't know if that is because the carbs don't like the cold air.
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Unread 08-27-2011, 09:57 AM   #9
Wrangler11
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Originally Posted by MDonovan8 View Post
A few questions arise when reading all the posts. When you say "blown engine', is the crank broke, rod thru the side of the block, mains shot? It sounds like you have mechanical experience if you are building a Land Rover, so rebuilding that engine is also an option, but a 2.5 pushing 33's, that's a big strain. If you drive around town and light off road maybe, but if you put that on the highway, all bets are off. Being in Chi Town, how is the frame and rust on the Heep. It seems like the the Heepers that love their 4.2's live in warm climates, don't know if that is because the carbs don't like the cold air.
I have not had a chance to look at it yet. I do not want to waste my time if I decide not to trade for it. He said it had a blown engine. The oil filter or came lose. He said once he realized it, it was too late. I'm not sure if the engine is salvageable or not.

If I went with anything other than a 2.5 wouldn't I have to swap the trans and possible the transfercase? I really do not want a huge project. Not right now at least. I want a wrangler as dd. Great in the snow and a blast in the summer.

I'm starting to lean to not doing this, but the YJ just looks soooo nice. Not to mention I really do not want the Acura.
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Unread 08-27-2011, 11:45 AM   #10
TheRobster
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Would you people read the specs. The 4.2 is a complete POS. It has less horsepower than the 2.5, and right about the same for torque.
Advise him to put in a 4.0. Fine. Uprated drivetrain from something else. Fine. 4.2L read the freaking specs!
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Unread 08-27-2011, 06:20 PM   #11
raynmaker
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Quote:
Originally Posted by TheRobster View Post
Would you people read the specs. The 4.2 is a complete POS. It has less horsepower than the 2.5, and right about the same for torque.
Advise him to put in a 4.0. Fine. Uprated drivetrain from something else. Fine. 4.2L read the freaking specs!
WTF are you smoking? I would put my 4.2 up against a 2.5 anyday!! And if you do simple math 2.5 < 4.2 and by shear volume..... Get the point?

And I would advise you to remember we can all post our oppinions, and that is what they are. If you disagree, fine but you don't have to get snootty about it.
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Unread 08-27-2011, 06:22 PM   #12
raynmaker
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2.5L I4 TBI (fuel injected) - 121 hp @ 5000 rpm, 135 ftlb @ 3500 rpm - used in '87-'90
2.5L I4 MPI (multi-port injection) - 130 hp @ 5250 rpm, 139 ft lb @ 3250 rpm - used in '91-'95

4.2L I6 Carburated AMC 258 - 112 hp @ 3200 rpm, 210 ft lb @ 2000 - used in '87-'90
4.0L I6 MPI AMC 242 "Power Tech HO" (High Output) - 190 hp @ 4750 rpm, 220 ft lb @ 4,000 rpm - used in '91-'95


Please not 2.5 139 ft lb at 2000 4.2 210 ft lb @ 2000
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Unread 08-27-2011, 06:57 PM   #13
TheNewbie
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Originally Posted by TheRobster View Post
Would you people read the specs. The 4.2 is a complete POS. It has less horsepower than the 2.5, and right about the same for torque.
Advise him to put in a 4.0. Fine. Uprated drivetrain from something else. Fine. 4.2L read the freaking specs!
I would agree with you on the horsepower part. But the 4.2 kills the 2.5 in torque.

Plus the 4.2 with a FI setup (as suggested) would put out more HP and torque.
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Unread 08-27-2011, 07:15 PM   #14
Tom95YJ
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Quote:
Originally Posted by tommbstone View Post
I'm the new noob but I'd say NO get a 4.2 (258) or the 4.0 say 91-92. Having said that my 89 carb 258 has a lot more power than my buddys 91 HO 4.0. I just saw a 258 with howell kit on another site for about 2k all fresh engine too.
Your funny this is the biggest load of crap I've seen in a good while on here !

A 4.2l being more powerful than a 4.0l

Let's look at the spec's of the 2 engines.

4.0L 190 hp and 225 lb·ft
4.2L 112HP and 210 lb.ft



I'm not the best person at math but I see a 78hp & 15lb.ft difference #'s dont lie
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Unread 08-27-2011, 07:34 PM   #15
giggityjeeper
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Quote:
Originally Posted by TheRobster View Post
Would you people read the specs. The 4.2 is a complete POS. It has less horsepower than the 2.5, and right about the same for torque.
Advise him to put in a 4.0. Fine. Uprated drivetrain from something else. Fine. 4.2L read the freaking specs!
yes the torque difference is what is the difference, not the HP, who cares about HP, I love the 4.2, low range it idles over most things, lets just look at ease of mods, and ease of upgrades and maintence for some things

my fuel pump is 13 dollars and 12 minutes to change... how mcuh and how long does it toake to do a 4.0 or 2.5 in the tank... hmmmm

I got 8 wires for my computer, and you???

its a great little engine... and its bomb proof to boot,

yep its carbed, I got a weber fires every day from +30 to -50... yep it gets cold in northern BC.... I love my 4.2, would i swap for a 4.0, NOPe, if Im gonna swap it will be a V8,
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Started with some rust repairs ended in a SOA...

http://www.jeepforum.com/forum/f12/h...-jeep-1050879/

family roll bar swap/upgrade..

http://www.jeepforum.com/forum/f12/f...grade-1054753/

1990 YJ. SOA, OME 36R 3.5" lift springs, OME 5/8 greasable shackles, OTT high steer, Custom cage, team Rush, Posi, 33 TSL swampers
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