motor swap? -
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post #1 of 3 Old 01-20-2012, 12:49 PM Thread Starter
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1991 YJ Wrangler 
Join Date: Nov 2011
Location: Hibbing
Posts: 80
motor swap?

have 91 yj 4.0 that is on it's last leg. I want to swap in another motor but having tough time locally tracking one down. however I found a 98 4.0. will this work with my harness and computer? my 91 is injection

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post #2 of 3 Old 01-20-2012, 01:27 PM
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1988 YJ Wrangler 
Join Date: Oct 2005
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It will work, just have to swap the sensors and accessories from your block to the new one.
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post #3 of 3 Old 01-20-2012, 03:13 PM
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There are certain differences in the evolution of 4.0 block. Your best bet is to find one with the same casting number. A 1998 / 4.0 xj block should have identical bolt patterns.

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