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Unread 08-06-2011, 08:06 PM   #1
exigex
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1989 YJ Wrangler 
 
Join Date: Jul 2011
Location: , NH
Posts: 9
What engine do I have?

Hey just picked this YJ up and it was originally a 2.5 I4, but it looks like it had a 4.2 I6 swapped in. Can someone confirm what engine this is?
The pics are kinda ****ty but it's dark out and lighting in my garage sucks...






Last edited by exigex; 08-06-2011 at 08:39 PM..
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Unread 08-06-2011, 09:01 PM   #2
moonshinefuel
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1995 YJ Wrangler 
 
Join Date: Feb 2009
Location: Los Angeles. California. United States.
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I started a thread a while back inquiring about engine numbers. This may be of help to narrow it down a bit more. http://www.jeepforum.com/forum/f12/e...number-748501/
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Unread 08-06-2011, 09:03 PM   #3
jeepinjohn88
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1999 TJ Wrangler 
 
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yup thats a 4.2l
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Unread 08-06-2011, 09:54 PM   #4
Noltz
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YJ Wrangler 
 
Join Date: Oct 2010
Location: Hamilton, Ontario
Posts: 746
Confirm 4.2 swap. Why, dunno.
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'91 Frankenheep YJ. 4.0, 4" BDS, Richmond 8.8, Titan 12k, 35" KM2's, rust.
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Unread 08-06-2011, 10:02 PM   #5
GAT72991
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1989 YJ Wrangler 
 
Join Date: Sep 2010
Location: , South Carolina
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4.2L, count plug wires.
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Unread 08-06-2011, 10:08 PM   #6
exigex
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1989 YJ Wrangler 
 
Join Date: Jul 2011
Location: , NH
Posts: 9
Yea I know it isn't a 4cyl, but didn't know what I6 it was...
I guess bc it is carbureted it is the 4.2, the 4.0 didn't come carbureted did it?
I'm not too familiar with jeeps.
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Unread 08-06-2011, 10:14 PM   #7
jgillespie
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1991 YJ Wrangler 
 
Join Date: Oct 2007
Location: Dalton, Georgia
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4.2's were carbed. 4.0's were MPI
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Unread 08-06-2011, 10:20 PM   #8
exigex
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1989 YJ Wrangler 
 
Join Date: Jul 2011
Location: , NH
Posts: 9
cool thanks for the input guys.
next i will need to find out what diffs are in this thing...
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Unread 08-06-2011, 10:40 PM   #9
Noltz
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YJ Wrangler 
 
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Location: Hamilton, Ontario
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With any luck the 4.10's!

That'd be different. Buy the 2.5 and swap engines, instead of buying the 4.0 and putting 4-cyl axles under it
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'91 Frankenheep YJ. 4.0, 4" BDS, Richmond 8.8, Titan 12k, 35" KM2's, rust.
'88 YJ, 4.2/4.0 head, +4" & shackles, BFG 33's (sold)
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Unread 08-08-2011, 10:34 PM   #10
exigex
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1989 YJ Wrangler 
 
Join Date: Jul 2011
Location: , NH
Posts: 9
hmm just decoded the vin from some posts and links i found on this site and apparently it actually did come stock with a 4.2 I6 and it is canadian since the 1st number of the vin is 2...
when i bought it it was being advertised as a 2.5 I4, guess the woman who was selling it had no idea.
Since i didn't know much about jeeps i just figured at one point in time it had a bigger engine swapped in it.
So everything on it is probably what ever was stock on an 89 YJ with a 4.2.
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