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Unread 02-28-2008, 01:41 AM   #1
jeepsurf
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New life for a neglected YJ

I've bought a YJ thats been sitting for 6 years. (pics on 2nd page) I'm getting ready to start it this weekend. I've changed plugs, wires, cap, rotor, air, oil, and fuel filters. I've changed the oil, coolant, dropped the gas tank and cleaned it out. The engine turns by hand so I think I'm good. Have I forgotten anything? Or any recommendations?

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Last edited by jeepsurf; 03-01-2008 at 11:21 AM..
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Unread 02-28-2008, 01:49 AM   #2
That1guy
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Pictures are nice
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Unread 02-28-2008, 05:01 AM   #3
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Diffs, tranny, transfer case, wheel bearings.
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Unread 02-28-2008, 05:07 AM   #4
rustywrangler
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Quote:
Originally Posted by pacodelahoya View Post
Diffs, tranny, transfer case, wheel bearings.
. also break out your grease gun and you really should look at those brakes. They prolly should just get replaced all around.

Also, take a look at your clutch res. and brake fluid res.
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Unread 02-28-2008, 05:59 AM   #5
dell2028
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Quote:
Originally Posted by rustywrangler View Post
. also break out your grease gun and you really should look at those brakes. They prolly should just get replaced all around.

Also, take a look at your clutch res. and brake fluid res.
Defiantly, going is great, but stopping is better.
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Down the line a bit...engine swap, the list goes on.
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Unread 02-28-2008, 08:20 AM   #6
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another good thing to look at is to make sure all of the hoses are not dry rotted a lot of this stuff goes overlooked. I've seen them blow up after being stored for so long. The person forgot to look at dry rotted hoses.
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Unread 02-28-2008, 08:56 PM   #7
jeepsurf
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My objective for now is to get it started. I've got lots to do before I drive it. I'm gonna change the trans, tc, and diff fluids. The drum brakes (hardware) was so rusted the wheels wouldnt turn. When I took off the driveshaft, the caps and needle bearings came off, so I guess I'm buying new Ujoints. I've held off on the trans and TC fulid due to the PO said he parked it cause he thought there was a problem w/ the clutch slave. I'ma get it running and go from there. I guess this will become my offical build thread
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Unread 02-28-2008, 09:02 PM   #8
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U joint question. I've got a 1990 yj 2.5, np231, with a d35. What size rear ujoint? Will this one work http://www.quadratec.com/products/52302_100.htm ?

Does anybody have a link to a write-up for changing ujoints? Or any advice?
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Unread 02-28-2008, 09:57 PM   #9
ZonaWrangler
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Quote:
Originally Posted by jeepsurf View Post
U joint question. I've got a 1990 yj 2.5, np231, with a d35. What size rear ujoint? Will this one work http://www.quadratec.com/products/52302_100.htm ?

Does anybody have a link to a write-up for changing ujoints? Or any advice?
You've got the carbed 4 banger? Everyone here is gonna tell you ... yank the whole deal. The fuel injected 4 banger is another story, but the 1990 4 banger had a carb ... I've never had one ... just know it's bad.

You might be able to pick up a 4.2L with trans pretty cheap of you look around. Yer talking about a whole new fuel sending system to switch to a 4.0 though.

If you have a broken ujoint, I believe you can upgrade to the largest size available without any issues. Someone correct me if I'm wrong.
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Unread 02-28-2008, 10:05 PM   #10
pat8942
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Thats the right joint and I think if you do a Google search you can find a how to.
Quote:
Originally Posted by jeepsurf View Post
U joint question. I've got a 1990 yj 2.5, np231, with a d35. What size rear ujoint? Will this one work http://www.quadratec.com/products/52302_100.htm ?

Does anybody have a link to a write-up for changing ujoints? Or any advice?
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Unread 02-28-2008, 10:07 PM   #11
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1990 was TBI
Quote:
Originally Posted by ZonaWrangler View Post
You've got the carbed 4 banger? Everyone here is gonna tell you ... yank the whole deal. The fuel injected 4 banger is another story, but the 1990 4 banger had a carb ... I've never had one ... just know it's bad.

You might be able to pick up a 4.2L with trans pretty cheap of you look around. Yer talking about a whole new fuel sending system to switch to a 4.0 though.

If you have a broken ujoint, I believe you can upgrade to the largest size available without any issues. Someone correct me if I'm wrong.
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Unread 02-28-2008, 10:09 PM   #12
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The only issue with larger joints is replacing all the yolks so IMO it's an issue.
Quote:
Originally Posted by ZonaWrangler View Post
You've got the carbed 4 banger? Everyone here is gonna tell you ... yank the whole deal. The fuel injected 4 banger is another story, but the 1990 4 banger had a carb ... I've never had one ... just know it's bad.

You might be able to pick up a 4.2L with trans pretty cheap of you look around. Yer talking about a whole new fuel sending system to switch to a 4.0 though.

If you have a broken ujoint, I believe you can upgrade to the largest size available without any issues. Someone correct me if I'm wrong.
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Unread 02-28-2008, 10:14 PM   #13
pat8942
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No such thing as a carbed 2.5 YJ except in Egypt or Argentina.
CJ's had a carbed Iron Duke 151 CI but not the YJ.
Quote:
Originally Posted by ZonaWrangler View Post
You've got the carbed 4 banger? Everyone here is gonna tell you ... yank the whole deal. The fuel injected 4 banger is another story, but the 1990 4 banger had a carb ... I've never had one ... just know it's bad.

You might be able to pick up a 4.2L with trans pretty cheap of you look around. Yer talking about a whole new fuel sending system to switch to a 4.0 though.

If you have a broken ujoint, I believe you can upgrade to the largest size available without any issues. Someone correct me if I'm wrong.
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Unread 02-28-2008, 10:21 PM   #14
ZonaWrangler
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I just know that in '95 they switched to larger ujoints. Maybe not a direct swap, 95 YJ to 90 YJ but I can't imagine it's hard to make it fit.

Also, I know that my 95 2.5L 4 banger, with a Helix TBS and an AEM Brute Force cold air intake, platinum plugs, Accel wires ... it does 95 MPH on the freeway, and gets 21+ MPG in the summer, in the city, with the AC blasting.

But ... yer talking like $500 in mods, and it still wont be as fast as a 6 cyl.

Far as EFI goes ... the MPG on the 4.0 is not much differnt from the 2.5. Like anything else, it depends how you drive it. Keep your foot out of the pedal.

Point is ... for the pre EFI 4 bangers ... there's nothing you can do with it to make it better besides a carb upgrade or custom exhaust ... and that's a waste.
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Unread 02-28-2008, 10:46 PM   #15
pat8942
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Yeah all you gotta do is change the front and rear diff yolks and get different drive shafts and different yolks for the front t-case outputshaft.
It's not just a matter of putting different joints in as they wont fit in your drive shaft.
It's not worth the trouble, just get the stock one's and don't believe poeple who don't know the facts.
No dis to Zonawrangler but he doesn't understand the dynamics of this stuff.
Quote:
Originally Posted by ZonaWrangler View Post
I just know that in '95 they switched to larger ujoints. Maybe not a direct swap, 95 YJ to 90 YJ but I can't imagine it's hard to make it fit.

Also, I know that my 95 2.5L 4 banger, with a Helix TBS and an AEM Brute Force cold air intake, platinum plugs, Accel wires ... it does 95 MPH on the freeway, and gets 21+ MPG in the summer, in the city, with the AC blasting.

But ... yer talking like $500 in mods, and it still wont be as fast as a 6 cyl.

Far as EFI goes ... the MPG on the 4.0 is not much differnt from the 2.5. Like anything else, it depends how you drive it. Keep your foot out of the pedal.

Point is ... for the pre EFI 4 bangers ... there's nothing you can do with it to make it better besides a carb upgrade or custom exhaust ... and that's a waste.
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