Re: [Amc-list] Swap 2.5 AMC for 2.5 Iron Duke in Eagle

[Frank Swygert <farna@xxxxxxx>]

The Iron Duke as used by AMC (and all pre-84 AFAIK) use the small block Chevy bell pattern. Later ones use the same pattern as the AMC four -- the small Chevy pattern (used on most, if not all, fours and all 60 degree V-6s, and the Cadillac 4.1/4.5L V-8s -- not sure if the Northstar uses it or not, but might). 

Most believe that AMC used that pattern for their engine so that it could use the same drivetrain (mainly transmission) as the V-6 Cherokee (84-86 models used a GM 2.8L V-6, hardly worth more than the 2.5L four!). At the time AMC had planned on continuing to use the V-6. A suspension designer who worked for Jeep at the time claims that the XJ was intentionally designed NOT to use the AMC I-6 because the designer "didn't like it". I'd have preferred the carbed 258 to the 2.8L V-6, but that's just me! The firewall was redesigned and the front of the engine modified to make the 4.0L fit. 

I'm not sure how the engine mounts changed in the Eagle when they switched to the AMC four. It was only used a year or two before being dropped. I suggest you visit the Eagle Nest (www.amceaglenest.com) and ask about the engine mounts. 

-----------------
Date: Tue, 18 Mar 2008 07:52:38 -0700 (PDT)
From: Jesse <j2sax@xxxxxxxxx>

What has to be changed if I want to put a 2.5 AMC
engine in my Eagle which currently has an Iron Duke? 
For those that don't know, the bellhousing is not the
same on the AMC 2.5 as other AMC's... but is it the
same as the Iron Duke?  

What are the differences in the crossmembers?  

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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