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View Poll Results: What engine?
4.0L 18 22.22%
5.2L 63 77.78%
Voters: 81. You may not vote on this poll

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Unread 06-24-2013, 09:11 PM   #76
XJ90
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I had to sell mine back when gas prices blew up

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Unread 06-24-2013, 09:34 PM   #77
jeeepguy
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Quote:
Originally Posted by Yoda95 View Post
I am new to the forum, but not new to Jeeps or 4x4s....and I felt I had to chime in. I have the 4.0, and I can already say I am glad it is the six, not the eight. I have been reading some history, and AMC designed these things to take the 4.0 six, Chrysler stuffed the V-8 into them to keep up with the Explorers and 'Burbans. There was a story on the web a while back about some guys who took a pair of ZJ's all the way to Central America, and they had 4.0s. Everyone I know says the 4.0 is the engine to have, and there are a ton of them out there for parts.

My vote is 4.0, and I shopped for one that way. I wouldn't get a ZJ with a V-8, it seems like overkill. Mine is quick and powerful, and comes off the line with plenty of power. Does 70 on the highway without breaking a sweat, and has oomph for passing.

On a side note, I am doing the valve cover gasket soon...and I only have to do one!
OT...
The ZJ is an all Chrysler design... AMC designed the Cherokee
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Unread 06-24-2013, 10:56 PM   #78
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Quote:
Originally Posted by jeeepguy View Post
OT...
The ZJ is an all Chrysler design... AMC designed the Cherokee
chrysler bought AMC because they wanted the ZJ design...
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Unread 06-24-2013, 11:06 PM   #79
SLOspeed
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Quote:
Originally Posted by jeeepguy View Post
OT...
The ZJ is an all Chrysler design... AMC designed the Cherokee
NOPE. The ZJ was a completed design before Chrysler bought AMC. The ZJ project dates back to 1983. AMC had running prototypes of the ZJ in '87. Chrysler shelved it for 5 years so they could concentrate on their minivans.

http://en.wikipedia.org/wiki/Jeep_Gr...ee#Development
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Unread 06-25-2013, 07:30 AM   #80
Yoda95
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I like the fact that it is the last AMC designed vehicle...nostalgic. The more I read about AMC the more I like the company...the little car company that tried really hard to compete with the Big Boys. Most of what I have read points out that if they had been able to hang on for another year or two, the ZJ would have been a smash hit and they might have survived!

Does anyone know the difference between the 4.0 and the 4.0 "HO" I have seen in some YJs? Probably covered somewhere else, but I just thought I would ask.
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Unread 06-26-2013, 10:15 AM   #81
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Quote:
Originally Posted by Yoda95 View Post
Does anyone know the difference between the 4.0 and the 4.0 "HO" I have seen in some YJs? Probably covered somewhere else, but I just thought I would ask.
the HO had multi port injection and IIRC the "open" cooling system. the eariler 4.0 was the "renix" system (this is discussed in depth in the cherokee forums). it was TBI if im not mistaken
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Unread 06-26-2013, 12:09 PM   #82
LunaMoona
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Quote:
Originally Posted by L_Kilkenny View Post
That has to be the most DS comparison someone could make. Military Humvees need 4WD a heck of a lot more than all but hardcore Grands do. FT on a dedicated play rig, fine i can go with that. On anything that see's the road? Heck no.

And why anyone would want 4WD that automatically kicks in is besides me. That's worse than FT for Lord's sake. Getting into stuff you might need 4WD for....... throw the lever. It's not rocket sceince, the lever is 4" from my knee. Then guess what.... It's like having FT. Wow. I'm not waiting till I start spinning and don't want my rig to do it for me either Thank you very much..
You realize that with the 242, the driveshaft is still spinning, right? So even when you're in '2wd', you're not really doing anything except maybe reducing wear on parts.

The 249 is a superior transfercase. The only flaw is VC failure, which is an easy fix.
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Unread 06-26-2013, 12:42 PM   #83
dnuccio
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Quote:
Originally Posted by LunaMoona View Post
You realize that with the 242, the driveshaft is still spinning, right? So even when you're in '2wd', you're not really doing anything except maybe reducing wear on parts.

The 249 is a superior transfercase. The only flaw is VC failure, which is an easy fix.
sure the driveshaft is still spinning. thats because its connected to the axle. its not receiving ANY power when the 242 is in 2wd.
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Unread 06-26-2013, 02:11 PM   #84
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Which xfer case is the one with the partial CV axle? I have read that the V8 models have a partial CV joint from the xfer case to the front dif?

It seems there are pros and cons to a V8 setup. Sure, power, power...but it seems the six is easier to maintain, and the 242 xfer case is, too. All I know is that if I really need full-time, I pop it into Low and blame the open difs if I get stuck.
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Unread 06-26-2013, 02:46 PM   #85
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Yes the v8 has cv axles as well instead of u joint ones but those are an easy swap as is a u joint front shaft and a 242 case. Most of us mod our jeeps anyway these cheap strength swaps are nothing for the basic backyard mechanic. The v8s do have stronger transmissions tho in general. Plus the stronger rear axle in certain years. Both much more expensive things to fix than any of the v8s weaknesses.
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Unread 06-26-2013, 03:11 PM   #86
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Quote:
Originally Posted by Yoda95 View Post
It seems there are pros and cons to a V8 setup. Sure, power, power...but it seems the six is easier to maintain, and the 242 xfer case is, too.

Exactly what maintenance is easier on the 4.0 that is harder on the V8?

And what maintenance are you doing on the 242 that is harder to do on the 249? The drain and fill ever 24,000 must be tougher on the 249 I guess.
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Unread 06-27-2013, 03:43 AM   #87
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Stock, DD, occasional lightweight tow. 20-24 mpg. get the 4.0


If your friend plans to lift it, put 33/35+ tires, bumpers, winches, skids, plans to wheel it, tow heavy **** with it, pack it up with 5 people/equipment and a roof rack then by all means get the v8. the 4.0 would be absolutely terrible for this. If your friend wants a lot of power get the v8.


It really depends on his wants, needs, and plans for the vehicle.
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Unread 06-27-2013, 08:40 AM   #88
Yoda95
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I agree with dean, and mine is also my DD. WhiteOut, is the 249 the one with the partial CV axle? I dunno, maybe I was thinking it was harder to do than a U-joint.

As far as ease of maintenance, I was thinking of the spark plugs, valve cover gasket, more room in engine bay for working on other stuff. And, of course, it takes less of everything, like 2 less plugs, fluids, etc. I imagine exhaust manifold gaskets on that V8 can be a pain, too.
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Unread 06-27-2013, 08:46 AM   #89
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Quote:
Originally Posted by Yoda95
I agree with dean, and mine is also my DD. WhiteOut, is the 249 the one with the partial CV axle? I dunno, maybe I was thinking it was harder to do than a U-joint.

As far as ease of maintenance, I was thinking of the spark plugs, valve cover gasket, more room in engine bay for working on other stuff. And, of course, it takes less of everything, like 2 less plugs, fluids, etc. I imagine exhaust manifold gaskets on that V8 can be a pain, too.
Doesn't 4.0s take more oil than the 5.2? 5.2L exhaust manifolds don't have gaskets from the factory. When I put the new 5.2L motor in, it came with gaskets so I threw them on....I have an exhaust leak now...
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Unread 06-27-2013, 09:55 AM   #90
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The exhaust gaskets are harder to reach on the 5.2 than the 4.0 with the engine installed, Scopez.
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