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Old 01-29-2007, 05:14 PM   #1
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Wrangler 2.5 VS. 4.0

I am in the market for a Wrangler. I have been a mechanic for some time now, but I am very unfamiliar with Jeep products, having not worked on many. What is the dependability of the two different engines? I know the 4.0 is a torqy engine, but does it really matter?? This vehicle will be an everyday driver and I will be doing some hunting in it.

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Old 01-29-2007, 05:17 PM   #2
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the 4.0 is known to go over 200k miles. and a general rule of thumb i like. theres no replacement for displacement

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Old 01-29-2007, 05:20 PM   #3
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Does the 2.5 have many common problems??
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Old 01-29-2007, 05:43 PM   #4
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Both engines are good and will last well over 100k. The main issue most have with the four is the lack of power. The 5spd with the four is okay, the auto is just not fun. If your budget will allow more, get the 6.
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Old 01-29-2007, 05:45 PM   #5
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i know 2 people with the 4cyl and neither have them have had any problems that i know of. and both have them have been dogged pretty hard. both of them are over 10yrs old. my 6 cyl is doin pretty good. it's got some excess oil blow by but it sat for a good long time so thats got a lot to do with that. i even ingested a good bit of muddy water into mine and it still runs good. another fella i no with the same yr model as mine and his runs like a top and has over 200k on his. both of ours are 15-16 yrs old.
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Old 01-29-2007, 05:46 PM   #6
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Does the 2.5 have many common problems??
Not that I can think of at the moment. IMO if its going to be a daily driver to go with the 6 cylinder.
The four just has a bad combination of lack of HP and high gearing. The 3.73 gears coupled with the neon engine make for a lot of downshifting while going into the wind and up hills.
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Old 01-29-2007, 05:49 PM   #7
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i thought the 4cyl comes with 4:10's?
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Old 01-29-2007, 06:30 PM   #8
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Quote:
Originally Posted by rebelBullDawg325 View Post
i thought the 4cyl comes with 4:10's?
i think the 4cyl YJ has 4.88...?
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Old 01-29-2007, 06:55 PM   #9
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hmm. research time. but back to the main question. both engines are great. i personally prefer the 6cyl. its up to you really.
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Old 01-29-2007, 08:49 PM   #10
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i think the 4 cyl. came with 4:10,s (5spd) and 3:73,s (auto)
get the 6 cyl. if you can. much funner to drive!
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Old 01-30-2007, 12:20 AM   #11
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my 2.5L has 4.10. and i know that some of the auto's came with 3.73. I have had no major problems with my 4-banger(knock on wood). it has been a wonderful little engine and at 155K, it continues to run like a champ. however, it does lag a little bit on the highway, but that's it. around town, it's a great little engine. but if i were to do it again....i'd get a 4.0L.
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Old 01-30-2007, 09:42 AM   #12
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Same story again. I have 4 cyl. with 5 speed and 4.10. I love it, drive it daily. Over 100k runs great. Less than desirable at highway speeds. Because of my daily driving, I would choose the 4 cyl. again, but if I had any regular highway driving to do, I'd take the 6 cyl.
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Old 02-03-2007, 07:59 AM   #13
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My understanding is the 6 is based off the old 258's that were in the CJ's for ever. I had huge luck with the old 258's and at 40K I am having the same luck with the 4.0, Injection just makes it better!! I plan on milking 200K out of this bugger!
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Old 02-04-2007, 12:00 AM   #14
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no milking required....just do the regular maintanence
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Old 02-04-2007, 12:14 PM   #15
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Quote:
Originally Posted by tmayes10 View Post
I am in the market for a Wrangler. I have been a mechanic for some time now, but I am very unfamiliar with Jeep products, having not worked on many. What is the dependability of the two different engines? I know the 4.0 is a torqy engine, but does it really matter?? This vehicle will be an everyday driver and I will be doing some hunting in it.

i think the best part about this thread is the fact that you're a mechanic and haven't had to work on jeeps that often.

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