What is the average life for a 4.0 Engine - JeepForum.com

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post #1 of 58 Old 04-28-2010, 04:11 PM Thread Starter
critmuncy99
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What is the average life for a 4.0 Engine

Just got a XJ cherokee 4.0 the other day just wondering what is the average life for these engines..Mine sounds like a deisel anyway lol

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post #2 of 58 Old 04-28-2010, 04:13 PM
Manche87
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my 87 comanche has 233,000 miles and my 98 xj has 165,000 miles

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post #3 of 58 Old 04-28-2010, 04:14 PM
Manche87
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if you take care of it, it should last up to 300k, but that depends how hard you drive/wheel it

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post #4 of 58 Old 04-28-2010, 04:26 PM
wes97
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my 94 had 255,xxx when i sold it, i still see it running around sometimes. its been over two years. it was driven very hard and wheeled the same way. the 4.0L will last along time when properly maintained. my current 98 has about 150K on it, so its baraly broke in
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post #5 of 58 Old 04-28-2010, 06:33 PM
carkook
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My 4.0 has 173,xxx miles. Redlined regularly and still runs like a champ!
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post #6 of 58 Old 04-28-2010, 06:33 PM
jeepxjadam
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i wouldnt worry about mileage. the entire jeep will rust out before the motor dies

1999 XJ Sport
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post #7 of 58 Old 04-28-2010, 06:34 PM Thread Starter
critmuncy99
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Well mine has 114k and im the second owner of it..The previous owner was a 48 year old woman..thats a little good news lol
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post #8 of 58 Old 04-28-2010, 11:43 PM
Dbiked
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Quote:
Originally Posted by jeepxjadam View Post
i wouldnt worry about mileage. the entire jeep will rust out before the motor dies
haha like an old honda. . . haha

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post #9 of 58 Old 04-29-2010, 01:31 AM
kirbWJ
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my XJ has 120,xxx miles, been beat to hell by the previous owner, he jumped it, smashed it, crawled it overheated it, its running with no cat, TPS is bad, something with my alternator circuit...blah blah needless to say the motor still purrs like a kitten... no joke the 4.0 HO in my 94 XJ is quieter than my WJ 4.0 powertech. and to think i got my XJ for $500, sure it breaks every law in the book when you drive it down the road, but who cares? its not illegal until you get caught! i would say you can get 300,000 out of a 4.0 if maintained well... my dads 89 XJ ran for 323,xxx... still ran and drove when he sold it for parts!
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post #10 of 58 Old 04-29-2010, 08:50 AM
COLOUXJ
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150k (if you dont do anything to take care of it) all they way to infinity. These things can last forever i think on this forum there is someone with 400k on the motor? i have for sure heard of 300k with no rebuilds.


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post #11 of 58 Old 04-29-2010, 02:40 PM
4low4fun
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Quote:
Originally Posted by critmuncy99 View Post
Just got a XJ cherokee 4.0 the other day just wondering what is the average life for these engines..Mine sounds like a deisel anyway lol
haha I thought I was the only one who said my XJ sounded like a deisel!

but I've got 183k on the clock and am very confident that it will for for 300k+
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post #12 of 58 Old 04-29-2010, 02:45 PM
Xerxes
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mine is at 206,xxx and runs like it was born yesterday. Im hoping to get it over 300k myself

Originally Posted by melk:
"Either more or less lube may change the moaning!"

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post #13 of 58 Old 04-29-2010, 02:57 PM
FairlanePhil
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Quote:
Originally Posted by 4low4fun View Post
haha I thought I was the only one who said my XJ sounded like a deisel!

but I've got 183k on the clock and am very confident that it will for for 300k+
Nope, mine sounds that way too. Not all the time but at startup it does
Been wondering what oil weight to start using. No clue what the PO used but the filter on it is a cheap generic POS. (just bought it)

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post #14 of 58 Old 04-29-2010, 03:00 PM
Nick
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My 00' is at 183K. All original parts.

2001 WJ | 4.7L V8 |
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post #15 of 58 Old 04-29-2010, 03:04 PM
RockMonster
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summing it all up, plain and simple, nobody will ever live long enough to find out haha

God... my spelling sux.... +++++++++++++++++++++++OIIIIO+++++++++++++++++++++ ++++
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