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I'm new here. 4.0 swap question


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Hey guys,

Just bought my first Jeep. Its an 89 comanche with the 4.0 5 speed manual. My question is will an xj motor be a direct swap. My mj has 179000 miles and i want to start rebuilding a replacement motor and have it ready. 

Thanks!

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What year is the XJ?  Yours is (probably) a Renix engine.  91+ XJs have HO engines.  The engines will swap over, but you will/may need to swap all the electronics from the XJ.

 

Fill in your profile so others know what you have.

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3 minutes ago, 87MJTIM said:

What year is the XJ?  Yours is (probably) a Renix engine.  91+ XJs have HO engines.  The engines will swap over, but you will/may need to swap all the electronics from the XJ.

 

Fill in your profile so others know what you have.

 

Exactly. Do THIS.

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