GM motor in a YJ????? - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 09-05-2001, 01:19 PM
**DONOTDELETE**
Guest
 
Posts: n/a
GM motor in a YJ?????

I have a 89 yj wragler with a 4.2l 6cyl on its last legs.
the jeep has a 5spd. is there any motors other than a jeep motor that will bolt right in... i heard that a GM 2.6 v6 will bolt right up to the tranny...any help with this would be great.... thanks
jim

Sponsored Links
Advertisement
 
post #2 of (permalink) Old 09-05-2001, 01:31 PM
Keyboard Implanted
 
Join Date: Sep 1999
Location: Near Chicago, IL
Posts: 2,537
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: GM motor in a YJ?????

I don't think the 2.8 will bolt up. Even if it did why would you want one?

Andytron is offline  
post #3 of (permalink) Old 09-05-2001, 01:59 PM
Pog
 
Join Date: May 2001
Posts: 365
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: GM motor in a YJ?????

I like the response andytron.

Ride 'N' High
Pog is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 09-05-2001, 02:01 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: GM motor in a YJ?????

Jeep used those engines in earlier Cherokees and the general concenses is that they are not too good


'88 Sahara, 4.2 that runs. The rest is getting there![img]/wwwthreads_images/icons/blush.gif[/img]
post #5 of (permalink) Old 09-05-2001, 02:11 PM
Keyboard Implanted
 
Join Date: Sep 1999
Location: Near Chicago, IL
Posts: 2,537
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: GM motor in a YJ?????

Thanks Pog. I have worked on enough 2.8's in S-10's to never want to see one again. They run forever if you treat em right(round 200K). But they are a hassle. They are a 60 degree motor so they have a goofy bellhousing bolt pattern. You can't use the trans from a SBC with the 2.8. It won't bolt up. So you gotta dig through the tranny pile at the boneyard looking for the right one. There are a couple of guys on the XJ/MJ board that love theres so if you want input ask them. Look for xjy173 and MJGUY.

Andytron is offline  
post #6 of (permalink) Old 09-06-2001, 08:55 PM
 
Join Date: Dec 2000
Posts: 292
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: GM motor in a YJ?????

uh,,... no don't even think about it. all 2.8's pretty much come standard with the rear piston hanging out of the block and have no power i dont care what anyone says. we've had 3 that have accumulated a total of like 300k miles thats not too great and the trucks were babied and religiously maintained and the s10's they were in couldnt even get out of their own way, personally i'd chose the jeep 4popper over a 2.8 but thats just me. as for swapping you can adapt to anything, but your best bet would be rebuilding the 4.2 it is a great little torqey motor with pretty good aftermarket following. other than that i'd got the big swap route with a 4.3fuel inj. and a 700r4 if you wanted a 6 and auto if not go with the 350 sm465 and np 205 but then you gotta swap axles if its a yj. soggysod


if it aint broke, break it so you can learn to fix it
soggysod is offline  
post #7 of (permalink) Old 09-07-2001, 01:43 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: GM motor in a YJ?????

Have you thought about a 4.0L out of a later model cherokee or TJ or even Grand Cherokee? Its a great motor...190hp, all kinds of torwue, long lasting, reliable, easy to find parts for, and best of all, its FUEL INJECTED!

...Just a thought...

Give me Jeep or Give me Death!!!

(Will trade functioning organs for CJ-7 or flatfender)
post #8 of (permalink) Old 09-07-2001, 10:33 AM
 
Join Date: Sep 1999
Posts: 3,478
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: GM motor in a YJ?????

The 2.8 is not a bad engine; the late 85s and 86s in XJs and MJs have the larger journals and better oiling than earlier models.

Andy is correct, though. You would have to modify the motor mounts to match a V-6. You would also have to find a Cherokee/Comanche with the same transmission as the YJ for the bolt patterns to match. It is much more economical to rebuild the 258, even if it has the lousy carb.

What you could do is buy a good donor 2.8 Cherokee, then change your mind. Rebuild the 258 and keep the Cherokee...you would then have 2 Jeeps. Good Luck!![img]/wwwthreads_images/icons/smile.gif[/img]

xjy173 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome