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Topic Review (Newest First)
10-16-2012 02:50 AM
bangingears Throw the 4.0 head intake and exhaust and fi on the 4.2 and live the mini stroker life lol
10-16-2012 12:04 AM
banks316 One thing you can do is get a 4.0L and put your intake and exhaust on it will have little less power but you should be fine.
10-15-2012 11:03 PM
4.2 Engine Swap

Hello Jeep heads. I am new to this forum, and have some questions. I have had a 95 Wrangler in the past, and I just bought a broken down jeep. It is a 1990 Wrangler YJ with the 4.2 with standard Trans. Are there any engines besides the 4.2 that will easily interchange without having trans and transfer case issues? Does the 2.5 or the 4.0 bolt up to the trans? Will the whole 4.0 engine and trans combo have issues lining up with the transfer case? Or should I just continue to look high and low for a 4.2. (not finding any) Thanks

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