TruckD

My xj has just over 100k miles on it & it runs fine now, but i was wondering if there were any things that would be smart to do to prevent any upcoming problems? (that you learned the hard way)

COSXJFAN

Regular fluid changes and keep an eye on everything. I have 190,000 on the clock and she still runs like a champ and I know there are guys with WAY more miles than that!! I have heard 300,000 thrown around, that's just sick!!

finneys98xj

220,000 on mine! WATCH EVERYRTHING!!!

usarmy0101

my jeep has 90,000 and the rear main seal is starting to leak i already changed the vauvle cover so yea watch out for the rear main seal. i look under my jeep every day to make sure i didnt loose to much oil

BlueXJ

That is too soon to need a rear main seal IMO. Check the oil filter housing for a o ring leak. They look similar in the point that they will drip oil off of the pan.

JakeWI

my 1993 had 200,000 miles on it and i had no major problems at all. you might need to do some gasket changes. oil pan, valve cover, diff. covers. nothing other than normal wear with mine. best vehicles ive ever bought.

Kyle

Just keep up on the maintenance, thats the best you can do. The 4.0's are known to last a very long time. Some would say your motor is just broken in

finneys98xj

The highest mileage I have seen on a 4.0l is 300,000+ on my uncles GC. And it is still goin. I would say the 4.0L is probably the second toughest motor I have seen, right behind the Ford 300-6. I have seen them run till the motor falls out and still am to run!

aircruiser

204,400+ on mine and still running strong. has a rear seal leak and randomly had a pressure leak in the cooling system once (think it was the radiator cap but hasnt happened since..all the coolant randomly overflowed.). other than that, im replacing the front axle u-joints soon along with the u-joints on the driveshaft but my jeep was babied its whole life by the previous owner since it was new.

c-loss

my first xj a 92 had 272,000+ on in when i finally killed it and the motor still fired up but the tranny was shelled and i was 16 so didnt know any better about replacing it. just keep up on maintanance and shell do just fine

kmehrtens

My 99 Cherokee has 257k and still running with no problems.

TrueBlueXJ

I love hearing these stories. My 1996 just rolled past 99k, and I'm starting to worry about stuff going wrong, but thus far the only things I've had to change have been the radiator and water pump, but those are expected.

BH1014

My Cherokee just turned 230,000 yesterday,keep the RPM's under 6,000 and the fluids changed you should have no problems.

okcjeeper

Mine just turned 147k oh wait but that's just 1800 miles on the new motor..

ColoradoJeepXJ

I have a 90 with 171,000. It has some some blow-by issues at high RPMs but is manageable with my home-made blow-by oil recovery system.When I bought the XJ, I replaced the rear main seal, pan, head and valve cover gaskets because of oil leaks. Now it runs strong, quiet , smooth and is leak free (other than the blow-by).