97 2.5L in a 90? - JeepForum.com
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Unread 02-25-2009, 10:56 AM   #1
jeepwrangler97
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1997 TJ Wrangler 
 
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97 2.5L in a 90?

somebody else on the forum might want to buy my 2.5 out of my 97TJ to put in their 90YJ and I thought it wouldn't be too difficult for him to swap his 2.5 for mine. It shouldn't be too difficult, should it?

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Unread 02-25-2009, 05:18 PM   #2
jeepwrangler97
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bump........
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Unread 02-25-2009, 05:30 PM   #3
SteveJcoYJ
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1991 YJ Wrangler 
 
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Quote:
Originally Posted by jeepwrangler97 View Post
somebody else on the forum might want to buy my 2.5 out of my 97TJ to put in their 90YJ and I thought it wouldn't be too difficult for him to swap his 2.5 for mine. It shouldn't be too difficult, should it?
can you rephrase that
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Unread 02-25-2009, 05:33 PM   #4
RedWrangler90
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1990 YJ Wrangler 
 
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He wants to know how difficult it would be to swap a 1990 yj's 2.5L for a 1997 yj's 2.5L
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Unread 02-25-2009, 06:37 PM   #5
SteveJcoYJ
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well in that case i did a write up on the trans swap 97' to 91' if you pull a whole drivetrain - http://www.jeepforum.com/forum/f12/tj-ax5-np231-conversion-write-up-697384/

but in any event, i believe the TJ has a 2.4L that has some differences to the 2.5L. In any event it could result in you needing to swap the TJ ECM along with the motor and everything else
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Unread 02-25-2009, 07:34 PM   #6
jeepwrangler97
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Quote:
Originally Posted by SteveJcoYJ View Post
well in that case i did a write up on the trans swap 97' to 91' if you pull a whole drivetrain - http://www.jeepforum.com/forum/showthread.php?t=697384

but in any event, i believe the TJ has a 2.4L that has some differences to the 2.5L. In any event it could result in you needing to swap the TJ ECM along with the motor and everything else
The Tj has the 2.5L, I thought the 2.5L cylinder head was the same in 97 and 90 and figured all he would have to do is take off my intake manifold and put on his carb/intake manifold. And thanks I'll look at your write up.

I was just wondering because the guy who was asking about buying my engine wanted to know. Thanks again
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Unread 02-25-2009, 07:37 PM   #7
SteveJcoYJ
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Quote:
Originally Posted by jeepwrangler97 View Post
The Tj has the 2.5L, I thought the 2.5L cylinder head was the same in 97 and 90 and figured all he would have to do is take off my intake manifold and put on his carb/intake manifold. And thanks I'll look at your write up.

I was just wondering because the guy who was asking about buying my engine wanted to know. Thanks again
if someone can verify the blocks are the same i don't see that being a problem
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Unread 02-25-2009, 07:38 PM   #8
tuckinauster
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I've got a '97 TJ 2.5L in my rig. It was as simple as attaching the original accesories, and dropping it in. I had it in and running in about 4 hours.

Edit:

For the most part, all 2.5L blocks are the same. There are some minor differences, such as the temp sensor location, and the valve cover, but they are all essentially the same.
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Unread 02-25-2009, 08:07 PM   #9
mgg1962
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I put a 97 tj motor into my 89 yj. I used the 89 electronics,the throttle body injection. With the 89 electronics i had to use the 89 flywheel. the flywheel has the right number of teeth for the cps. I used the motor mounts from the 89. I kept the serpentine belt from the 97 but i had to make a bracket from the power steering pump to the intake to hold the back of the pump. the 97 alternator uses the main computer to run the voltage regulator. i went to napa and picked up a solid state voltage regulator, i belive it was a vr1001. If you use the old v belt you could use the old gm style alternator. I had to use the 97 starter with some starter shims to fit the 89 flywheel. the person i got the motor from also gave me th 97 tranny/transfercase. i converted to external clutch slave cyclinder also. thats all i can think of for now. if you have any other questions dont be afraid to ask. this is a great site for jeeps.
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Unread 02-25-2009, 10:09 PM   #10
jeepwrangler97
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Thanks guys, even if this guy doesn't buy it, it's really nice to know so if anyone else wants to know, thanks again and if you guys think of anything else let me know
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