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Thread: How many miles will a 2.5 4 cylinder last? Reply to Thread
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Topic Review (Newest First)
09-18-2012 05:21 PM
brokeagin 95 with 220K plus. I had a piston skirt break off of number three cylinder, snatched the head off, replaced the piston & rings and stuck the head back on it. Still ticking along and just gotta keep it running until I finish gathering parts and scatter the whole Jeep...
09-18-2012 03:13 PM
BrandonYJReed 154,200 runs great no leaks, the ax-5 is a bastard tho...
09-18-2012 09:00 AM
DARKSLAYER56 1990 @ 290,000. Valve cover gasket has been removed so, probably been rebuilt at some time.
09-18-2012 08:21 AM
punchesdfw Just over 200K. Original engine, 2nd transmission. Driven every day.
09-18-2012 01:23 AM
Jedholmes Right now im sitting at 115K in my 94YJ. The PO didnt seem to take care of it to well as the coolant was the worst I had ever seen. Flushed the coolant, Did a complete Tune-up: Plugs(which actually looked pretty good) Wires, Dist, Fuel Filter, Sea Foam. She seem to be running pretty strong. I do have some tapping going on and I think I am going to have to put new rings in, but hey I'll drive it until it dies.
09-17-2012 09:42 PM
Defcon 1
Originally Posted by bangingears
i owned a 91 2.5 that i sold with 405,045 miles on it, it didnt burn a drop of oil and ran like a champ.

they are gutless wonders, but they are SUPER durable. keep oil and water in them and they will run forever
Awe man that's not very inspiring knowing that I'm only 1/2 way threw its life cycle, I'm waiting for it to die so I can get something bigger lol. But I do love my little 4-banger to death
09-17-2012 07:18 PM
bzar13 Exactly!
09-17-2012 05:30 PM
Carlsbad0331 A gazillion miles...
09-17-2012 03:25 PM
bzar13 Have a 93 4.0 w/ 225000mi , still runs like a champ
09-17-2012 03:19 PM
bangingears i owned a 91 2.5 that i sold with 405,045 miles on it, it didnt burn a drop of oil and ran like a champ.

they are gutless wonders, but they are SUPER durable. keep oil and water in them and they will run forever
09-17-2012 02:55 PM
Surfinglbi23 Mine has 178k on it, '95. Runs great, about to do a tune up this weekend. Done nothing besides regular maintenance.
07-31-2012 08:20 PM
Defcon 1 My 91' has 210,000 and it doesn't burn a drop of oil, (it does have a case of lifter-tick though, but what YJ doesn't)
07-31-2012 07:49 PM
honeaj My 95 2.4 has almost 255,000. Previous owner said it was rebuilt at 150. Runs great. Grinds going into 2nd.
07-26-2012 10:24 PM
UberJeep Purchased my 94 in Sept '11 with 114,000. Now it just turned 123. My Bayliner (boat) has the same engine (boat is carburated and Jeep is fuel injected) and it runs awesome! Boat has 100 hours on it but if I use it as replacement itl would be like new! 2.5 has been around for very long time for a good reason.
07-26-2012 07:17 AM
VinceTj So far im a 245 xxx and its running strong. Planning on building a stroker out of a 4 banger actually, the weak link with the 2.5 its the AX-5
07-26-2012 07:08 AM
95YamJam 95' yj, 183 k right now. Runs strong. Sounds like it's gonna come apart anyday lol! but has never given me trouble and doesn't burn oil.
07-25-2012 10:28 PM
OverkillYJ I looked at one when i was shopping for mine, 800,000 with two rebuilds. And it ran like a top.
07-25-2012 09:33 PM
DirtyRob Mine had a new engine at 112,000. From what I have seen 200,00 is luck on a 2.5. while 300,00 + is not uncommon on a 4.0. I have had 3 with over 300,000 and ran great, but this is my 1st 2.5 (90 YJ) and I am not impressed at all
07-25-2012 09:27 PM
Originally Posted by aalmutawakil View Post
as long as you want it to
07-25-2012 07:08 PM
not a jeep but

I know it isn't a JEEP but the Jeep I6 and I4 along with the vernable Buick 3.8L are certainly every bit as good and durable as the Saab. A Wisconsin salesman donated his Saab to the museum with over 1,000,000 miles on it. It had the transmission replaced ata bout 200,000 miles but the engine had no major repairs,

I know a cab company in Minneapolis concentrated on Ford ex police cruisers and they would routinely get over 500,000 on the Ford engines.

The thing that Jeep Wrangler's have against them is that they are not typically used for long, continuous interstate driving. short, off road driving is hard on longevity.

Again, regular maintenance and no extreme encounters, such as major overheating.
07-25-2012 06:25 PM
jeep30 169,000 here - no oil burning or leaks what-so-ever.
07-25-2012 06:19 PM
MickeYJ 92 2.5L manual with 103,000
07-25-2012 05:12 PM
JYD Mines a 93 2.5 with 127K and still running great.
07-25-2012 04:21 PM
red93yj I have a 93' 2.5 with 100,535 miles!
07-25-2012 03:36 PM
DARKSLAYER56 1990 2.5l 290,000 Who knows if it's been rebuilt though. Runs like a champ. Doesn't leak anything. (Which is kind of amazing)
07-25-2012 01:48 PM
Smirksmirk 95 YJ 2.5 4cyl 328k
Still running strong!!
03-26-2012 02:04 PM
CaseAce000 '95 2.5L with 116k

burns oil and blows gaskets every 3k but runs and shifts great
03-26-2012 12:59 PM
chainlake In theory, any engine with a parts source is immortal. It's your checkbook that has the finite number attached to it and your tollerance for pain that sets the time line.

125k on Edith, (my 2.5 95 YJ) Runs perfect. YJ series motors are anchient, time tested engineering. X2 on fluids and maintenance and above all else, know the diffrence between driving hard and abuse.
03-26-2012 12:38 PM
denisbaldwin In saying what everyone else said, doing maintenance and keeping a conscious eye on issues as they come up with keep any engine running a long time. The 2.5 is a tank but even it can be killed if not maintained.
03-26-2012 12:22 PM
P0234 The 2.5 can last every bit as long as the 4.0 with good maintenance. I think most are killed by overheating. Always trust the gauge unless you have MEASURED it being wrong. As soon as it starts running hotter than normal, pull over and figure out what is wrong. Once the needle goes past its normal point its going to keep climbing till your head gasket goes pop and other fun stuff starts to go.
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