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Unread 07-11-2005, 04:28 PM   #1
89YJmoneypit's Avatar
1989 YJ Wrangler 
Join Date: Dec 2002
Location: Marseilles, IL
Posts: 1,003
Engine options

Since my 4.2 is slowly dying the boss has allowed me a small budget to do something with it.What I'm trying to decide is if I should go with a reman 4.2 (ATK,Jasper ect...) or try and find a junkyard 4.0 with reasonable miles on it and do the swap.I would love to do a stroker,but I don't really wheel it enough to justify the time to build one and a V8 is out of the question.It would be nice to have fuel injection but the weber does Ok and I can always do a junkyard TBI swap later.The wife thinks I should get the reman 4.2 since they have a warranty but I don't think it's even an issue since it's not my daily driver and I barely put 2500 miles a year on it,but I also don't want to put something in that's gonna be giving me trouble in a year either.Any opinions are appreaciated.......

89 YJ
Transplanted '99 4.0, AX-15, NP231
Red Jeep club #8

97 ZJ Laredo
4.0, 42re, NP242
Was my daily driver, now son's college wheels.

Marseilles Fire Dept: http://www.flickr.com/photos/4461494...th/7659346164/
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Unread 07-13-2005, 08:19 AM   #2
Registered User
1986 CJ7 
Join Date: Jun 2004
Location: Monroe, WA
Posts: 1,602
Have a local shop do a short block. You can pick and choose components for not much more. Then find a 4.0 head, get a cheap "fractory" style header, then grind on the intake a bit to get it to fit. That way when you do your FI swap later all you will need for the engine is a stock 4.0 intake which can be had for cheap.
1986 CJ7, 4.2 w/4.0 head, TFI-HEI hybrid ignition, Clifford manifold w/Holley 390 w/cold air intake, OBA, 4.5" lift, Woody CV shaft and Tattons in front, 4.10 gears - lunchbox in front, Truetrac in the back, twin-sticked, blower upgrade for running topless, trying to keep it simple.

It's just a Jeep, and if you don't wheel it once in a while, it's not even that.
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