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Old 08-24-2010, 08:58 PM   #31
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Did someone say American muscle? If my Challenger were to ever die, I would put its motor in my Jeep. Although, I think my Hemi would twist my Jeep in half. LOL
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Old 08-24-2010, 09:37 PM   #32
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I owned both, for street you'd be happier with the 6. Off road it's no big deal.

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Old 08-26-2010, 06:50 PM   #33
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I didnt build my 99 tj to see how much faster i could run next to a 4.0,but Ill go anywhere in my 2.5 that any 4.0 will go.
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Old 08-26-2010, 11:27 PM   #34
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Hmmm I think I smell a challenge
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Old 08-28-2010, 10:52 AM   #35
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no challenge just saying 2.5 is reliable and pretty tough for a fourcylinder, i know of plenty with over 250,000 300,000 miles with no problems.
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Old 08-28-2010, 11:23 AM   #36
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That may be stretching it a bit, I've had about 10 in the last year that either had the motor replaced or it was blown up and I had to replace it.
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Old 08-28-2010, 01:34 PM   #37
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Depends on how well the motor is taken care of... I have had minimal problems with my 4 cylinder and I'm at 138,000.
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Old 08-28-2010, 02:46 PM   #38
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Properly maintained, the 2.5L has a good reputation for reliability. It's been around forever, any claims it is not reliable are highly exaggerated. Offroad in the type of wheeling I do, they do as well as the 4.0L engine does.
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Old 08-28-2010, 03:31 PM   #39
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I owned my 99 tj for 10 years now as far as the 2.5 it has started every time I turn the key, and thats weeling hard mud,rock,sand.
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Old 08-28-2010, 06:02 PM   #40
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Yeah, well....I can tell you from a parts perspective, they aren't that reliable and blow up alot.
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Old 08-28-2010, 06:48 PM   #41
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Its like aneything you get ones and you get bad ones,ive had good luck plus the lack of power results with less breakage.
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Old 08-28-2010, 06:51 PM   #42
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Quote:
Originally Posted by Ibuildembig View Post
Yeah, well....I can tell you from a parts perspective, they aren't that reliable and blow up alot.
You have turned into quite the Jeep expert here since recently buying your first Jeep.
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Old 08-28-2010, 06:55 PM   #43
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And you can also make your rig strong.
Ive seen shitty 4.0s, and I've seen shitty 2.5s. It's your preference... Mine has had no problems. I've taken mine on logging trails up in the Blue Ridge parkway/mountains.
And it also deals with tires and blah blah blah
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Old 08-28-2010, 07:11 PM   #44
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I have two 4 cyl. yj's and a 4 cyl. tj. The tj is the slowest, and I attribute that to being automatic. All 3 have 30 in. tires, and with the two yj's, both standards, I have no problem going 60 mph on all the hills in my area...the tj is lucky to get 45 up the hills...I like my 4 cyl., especially in the snow. Less wheel spin with less power, especially when plowing snow. If I want to run fast, I just hop in my 1972 cj5 with the stock AMC 304 V8. It's all in what you want and what you use the machine for. I know when I went on the Jamboree last year, my 4 cyl yj was gearing was recognizably lower than all the 6 cyl I was running with ( I was the only 4 on our trail). I had an easier time crawling than the others through the woods.
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Old 08-29-2010, 09:51 AM   #45
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I have alot of buddys that have the 4.0 in there rigs,In the woods they dont go anywhere I dont in my 2.5.Im running 5 speed 4.88 with 35/12.50km2 very surprised how the four banger has done and has held up, ten years and still ready to go when I am.
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Old 08-29-2010, 10:26 AM   #46
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Quote:
Originally Posted by Jerry Bransford View Post
You have turned into quite the Jeep expert here since recently buying your first Jeep.
Recently?

Jerry I have owned more jeeps, built more jeeps, and taken more apart than you have.
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Old 08-29-2010, 10:47 AM   #47
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99' TJ 2.5L. 146k Miles. I drive it every single day over 70+ miles and it has been nothing but reliable (knock on wood!). I cruise between 75-80 on the freeway with 31" tires. I've been to the sand dunes 2 years in a row and climbed every hill there and have even seen some air time.

All that being said, when the motor goes I will most likely look into a 4.0L swap. When the Jeep is loaded down with camping gear/firewood and I hit a steep incline on the freeway it won't go over 55-60. Makes the 2.5 hour trip up north seem that much longer.

Just my 2 cents
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Old 08-29-2010, 10:53 AM   #48
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Here's the 2.5 I pulled last week...124K, no lift and stock tires..this makes 6 in the last 12 months that have either done this or broke but not come outside the block. Now, you have to realize this is what I do for extra money...so I'm looking for the stranded and blown up jeeps to rebuild. There are alot more 2.5's with blown motors than 4.0's. Everyone has good luck now and again, but the numbers speak for themselves unfortunately.
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Old 08-29-2010, 11:05 AM   #49
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I have no doubt the 4.0L has a longer life than the 2.5L, afterall the 4.0L doesn't have to work as hard as the 2.5L does. I never said anything that would disagree with that.

MY disagreement with what you have been claiming is your attempt to make it sound like the 2.5L has a bad reputation for premature failures. It does not. If the 2.5L had a bad reputation for failures, I'd be in your court backing you up. However, it does not. I could post photos of nearly any engine out there with holes in the block but that wouldn't prove anything.
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Old 08-29-2010, 11:48 AM   #50
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As long as the four banger still kicking im sticking with it,sounds like theres alot of people dont know how to change oil or do the up keep necessary to keep there motors alive
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Old 08-29-2010, 11:53 AM   #51
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Proof is in numbers...I rest my case
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Old 08-29-2010, 12:25 PM   #52
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Getting back to ? 6 cant conquer anything that 4banger cant proof is about twice a month when Im in the woods enjoing myself doing everything or more that the big 4.0 or the big v8

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