Date code
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Joined: Sep 2010
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Year: 1992
Model: Cherokee
Engine: 4.0L
Date code
My new block, 4.0, shows a date code i dont understand. It is : 5Mx30. Does this mean its a '95 or from month 5 (may) and the year was never printed? There are no signs of wear to the surface
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Joined: Aug 2010
Posts: 8,357
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From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
If this is the original engine in your XJ (92), I would suspect that it was built May 30th (92?). Normally the month code would be two digits, like 05, but because since there is no month 15, I would be happy in thinking it's May.
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Joined: Sep 2010
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Year: 1992
Model: Cherokee
Engine: 4.0L
It's not from my original XJ. I bought it from a guy who got it from a friend who had wrecked or something...
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Joined: Sep 2010
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Year: 1992
Model: Cherokee
Engine: 4.0L
ok, so I looked at som pictures online. It appears it has a 87-90 head(based on the exhaust ports). Are there any major diffrences in the internal parts? Like pistons and cam during those years or can I just go ahead and get parts for a '90XJ.
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