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Unread 05-05-2013, 04:42 AM   #1
eagsc7
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1994 ZJ 
 
Join Date: Apr 2013
Location: Sweetwater Cyt, WY
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Passing 300K Miles...What now?

I've searched on the forums, (here and others), and haven't found this non-issue yet...

My 94 ZJ is at 294,000 Miles and I'm prepping for the 300K mark. It'll be right on time for an Oil change, and general inspection, but what else should I "change out" at the same time?

What's been done in the last 2 Months:
Spark Plugs, SP Wires, Cap&Rotor, Ign Coil, cleaned battery terminals, and Oil change at 293K.

Already Planned for this summer:
Lift(7" IRO Longarm), SYE, new Oil pan seals(leaks 1 drop/min) when Lifting, and new bumpers.


Thanks in advance

Ben

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Unread 05-05-2013, 04:48 AM   #2
eagsc7
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Ohh, and the other thing Definately worth mentioning is that my Great Sister was the Previous Owner and my Entire family's Maintnence schedue is "Run it til it breaks, then get it fixed". I asked when the Spark Plugs were done prior, and they had NEVER been done in 293K Miles. I could tell they hadn't been done in at least 50K, but yeah...

I also have used SeaFoam to clean the fuel and oil systems directly before oil changes.

Engine is 4.0 I6 with no 'abnormal' sounds coming from it yet. Tranny is solid, and Air Filter was replaced last week as well.

Ben
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Unread 05-05-2013, 04:49 AM   #3
Bigdjs123
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I would definitely give the axles some attention since your going to be putting a 7in lift on it
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Unread 05-05-2013, 06:36 AM   #4
stubburnjdh
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Congrats on almost hitting 300,000. My 95 is at 310,000 with original 5.2 I would think you would want to service the trans and pull covers on axles inspect and refill. Change diff fluid.
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Unread 05-05-2013, 05:37 PM   #5
Bigdjs123
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I would also check the entire cooling system especially the radiator. Mine was rotting out at 165k and it spent mosy of Its life in the south and the past 5 years in a garage
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Unread 05-05-2013, 06:01 PM   #6
9859limited
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Location: Woburn, Ma
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Quote:
Originally Posted by eagsc7 View Post
I've searched on the forums, (here and others), and haven't found this non-issue yet...

My 94 ZJ is at 294,000 Miles and I'm prepping for the 300K mark. It'll be right on time for an Oil change, and general inspection, but what else should I "change out" at the same time?

What's been done in the last 2 Months:
Spark Plugs, SP Wires, Cap&Rotor, Ign Coil, cleaned battery terminals, and Oil change at 293K.

Already Planned for this summer:
Lift(7" IRO Longarm), SYE, new Oil pan seals(leaks 1 drop/min) when Lifting, and new bumpers.

Thanks in advance

Ben
At 300k mine needed a third gear band, torque converter, got the dif fluids changed preventatively, had timing cover and valve cover gaskets replaced. And then shocks. Will yours need all this? I can't tell you over the internet but that's what I had to do hope it helps.
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Unread 05-05-2013, 06:24 PM   #7
AMCJAVELIN
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Join Date: Mar 2013
Location: West Paris, Maine
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I know mine at 244000+ miles the valve cover gasket needs to be replaced and third gear is starting to slip a little, I have the 4.0 litre and 42re also i'd change the u-joints would need probably replacing too
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Unread 05-06-2013, 02:38 AM   #8
eagsc7
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Location: Sweetwater Cyt, WY
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Summary thusfar:

Thusfar for 300K overhaul:
ALL Fluids drain and fill(Oil, Tranny, Transfercase, and Difs)
Filters(Oil, Tranny)
New Tranny Seal
Valve Cover gasket

When Lift is done:
Lift
SYE
U Joints
Shocks
?Axles
Engine Oil Pan Seal
Power Steering Pump(What about replacing the full system with Hydro?!)

~~Quotes and comments~~

Quote:
Originally Posted by Bigdjs123 View Post
I would also check the entire cooling system especially the radiator. Mine was rotting out at 165k and it spent most of Its life in the south and the past 5 years in a garage
My sister replaced the radiator when the deer hit the front end 2 years ago. When I pull the Front bumper, I'll be looking at it real good. It may get replaced, but its not leaking yet?!?

Quote:
Originally Posted by 9859limited View Post
At 300k mine needed a third gear band, torque converter, got the dif fluids changed preventatively, had timing cover and valve cover gaskets replaced. And then shocks. Will yours need all this? I can't tell you over the internet but that's what I had to do hope it helps.
I Unf. had to do the shocks like 3 months ago. Wished they would have lasted til the lift kit(would have saved almost $500), but they didn't.


Quote:
Originally Posted by 9859Limited
At 300k mine needed a third gear band, torque converter...
Quote:
Originally Posted by AMCJAVELIN View Post
I know mine at 244000+ miles the valve cover gasket needs to be replaced and third gear is starting to slip a little, I have the 4.0 litre and 42re also i'd change the u-joints would need probably replacing too
I just thought about it, and my 3rd gear May be starting to slip a bit. Its Very sporadic and only for about 1/2 of one second. I'm assuming that the 3rd gear band, the only way to do that is to actually pull out the tranny and have a shop do it. Is there a "Easy way" to do it at home with basic mechanical ability, and Without having to pull the engine out at the same time...
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Unread 05-06-2013, 07:12 AM   #9
zonkerd
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Quote:
Originally Posted by stubburnjdh View Post
Congrats on almost hitting 300,000. My 95 is at 310,000 with original 5.2 I would think you would want to service the trans and pull covers on axles inspect and refill. Change diff fluid.
wow! 310,00 on a 5.2! i just picked up my 95 with 5.2 (only with 115,000) that is nice to hear!!!!
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Unread 05-06-2013, 08:54 AM   #10
ZJMatt
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Curious how people from New England are getting that many miles out of their jeep (AMCJAVELIN, 9859limited). I've got 220k on mine now, still runs like a champ. Put about 1000 miles on it this week. Just got back from a 300 mile trip to northern Vermont last night and it gave me no issues. But the "frame" is cracked in 2 places from rust (had it welded as a temp fix till I get my new jeep on the road) and bottoms of the A-Pillars are non-existent. If it wasn't for rusting out I'm curious how many miles I'd be able to get out of it.

My new jeep has 199k on it and it's at the point now where underneath you can tell its from New England but it's not rotted. I'd like to save this one before it's too late!
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Unread 05-06-2013, 11:44 AM   #11
9859limited
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Quote:
Originally Posted by ZJMatt View Post
Curious how people from New England are getting that many miles out of their jeep (AMCJAVELIN, 9859limited). I've got 220k on mine now, still runs like a champ. Put about 1000 miles on it this week. Just got back from a 300 mile trip to northern Vermont last night and it gave me no issues. But the "frame" is cracked in 2 places from rust (had it welded as a temp fix till I get my new jeep on the road) and bottoms of the A-Pillars are non-existent. If it wasn't for rusting out I'm curious how many miles I'd be able to get out of it.

My new jeep has 199k on it and it's at the point now where underneath you can tell its from New England but it's not rotted. I'd like to save this one before it's too late!
Bought t with 290k on it and it's been coated before but starting to show some minor rust on frame. Body a couple of spots too but other than that she's good.
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Unread 05-06-2013, 10:44 PM   #12
eagsc7
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I was at Home Depot tonight and in the Spray Paint section, they have Spray on Bed Liner and Undercarriage Sealant. Looked like that'd work for those spots that are starting to rust. Sides that, Pick up some sheetmetal and a welder... Picked up the can of Bed liner to try a few coatings randomly to see IF I like it better than the carpet/Plastic that I have now. I also saw a can of RED Spray on Engine Paint... Hmmm?!?!?
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Unread 05-06-2013, 11:47 PM   #13
dnuccio
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Quote:
Originally Posted by eagsc7 View Post
I Unf. had to do the shocks like 3 months ago. Wished they would have lasted til the lift kit(would have saved almost $500), but they didn't.




jeez where did you spend almost 500 on shocks? if i knew i was lifting it soon, id just throw some cheapys on it to get me by.
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Unread 05-07-2013, 01:16 AM   #14
eagsc7
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Quote:
Originally Posted by dnuccio View Post
jeez where did you spend almost 500 on shocks? if i knew i was lifting it soon, id just throw some cheapys on it to get me by.
Yes, I Know its a ripoff, but it included the labor. I wasn't set up to do them at home myself. I ALMOST didn't even have them do them.

Ben
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Unread 05-07-2013, 08:08 AM   #15
stubburnjdh
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Quote:
Originally Posted by 9859limited View Post
Bought t with 290k on it and it's been coated before but starting to show some minor rust on frame. Body a couple of spots too but other than that she's good.
Mines got minor rust underneath. I just bought it from its second owner who has had it since 97. It has spent its whole life in northern Virginia. Its in excellent shape for 310,000 miles.
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