banshee Posted July 29, 2014 Share Posted July 29, 2014 What's the difference between a 93 and a 97 4.0L engine what if anything, will have to be changed to use it?? Oyea 93 Cherokee and 97 wrangler Thanks Link to comment Share on other sites More sharing options...
ftpiercecracker1 Posted July 29, 2014 Share Posted July 29, 2014 Believe it or not, not all 4.0s are created equal. What i mean by this is that some 4.0s are incompatible with the rest of the jeep family. After about 3sec of searching on ye ole google this is some of the info i am refering to. XJ Cherokee and ZJ Grand Cherokee 4.0L engine blocks interchange.2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange.XJ/ZJ blocks and 2000+ TJ/WJ blocks do not interchange without significant modifications. (1991 to 1995 YJ and 1997-1999 4.0L TJ Wrangler blocks will interchange in XJ/ZJ and visa-versa).TJ/WJ 4.0L Engine blocks underwent clean sheet design changes effective in the 1999 WJ Grand and 2000 TJ Wrangler. These blocks are not interchangeable with XJ/ZJ engine blocks. The reason is motor mount bolt holes and belt driven accessory mounting bolt holes are in different locations, or not present at all, TJ/WJ vs. XJ/ZJ. XJ: "Regular" (not Grand) Cherokees 84-01ZJ: Grand Cherokee 93-98 (Gen1)WJ: Grand Cherokee 99-04 (Gen2)YJ: Wrangler 87-95 (Gen1)TJ: Wrangler 97-06 (Gen2) Link to comment Share on other sites More sharing options...
benjy_26 Posted July 29, 2014 Share Posted July 29, 2014 When dealing with the pre 96 HO's, look for the 7120 casting number above the #4 exhaust port. This is the "holy grail" head to look for when doing a hi-po rebuild on the 4.0. Link to comment Share on other sites More sharing options...
HOrnbrod Posted July 29, 2014 Share Posted July 29, 2014 http://www.enginebuildermag.com/2006/05/peras-core-corner-its-time-to-say-goodbye-to-an-old-friend/ Link to comment Share on other sites More sharing options...
ftpiercecracker1 Posted July 29, 2014 Share Posted July 29, 2014 When dealing with the pre 96 HO's, look for the 7120 casting number above the #4 exhaust port. This is the "holy grail" head to look for when doing a hi-po rebuild on the 4.0. True, but OP should also be checking to make sure the port in the back of the head for the temp sender is present and tapped. Link to comment Share on other sites More sharing options...
benjy_26 Posted July 30, 2014 Share Posted July 30, 2014 Most are, if not, it's not hard to either mod the harness, or drill and tap the head in the proper spot. Link to comment Share on other sites More sharing options...
mikehussey54 Posted July 30, 2014 Share Posted July 30, 2014 jeepsunlimited.com I think this link would be of help. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now