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please help guy's!!!  I have 1986 comanche 2.5L. need new valve cover and I was told a valve cover off a Chevy S10 2.5l will work as Chevy was supposed to have made these engines. Is this correct & can I use a valve cover off an older S10 2.5L????

 

 

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A lot of people think the MJ/XJ 2.5L is a GM engine, possibly because of the 2.8, possibly also because AMC did very briefly use Pontiac's Iron Duke 2.5L. But it's not the case. The Jeep 2.5L is an AMC engine.

It was also used in later years with the Dakota I believe, along with the XJ. Later ones may have better valve covers and gaskets, but I can't speak to compatibility.

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The 2.5L used in the MJ/XJ/YJ/TJ was an AMC design derived from the 4.2L in line six. Ironically the 2.5L was produced by more or less removing the 2 middle cylinders from the 4.2L. The later 4.0L was created by adding them back into the 2.5L.

The 2.5L Iron Duke used in S10's was only used in the CJ 5/7's and that was a GM motor.

 

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