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Unread 07-15-2013, 09:37 AM   #1
scuba303
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1998 ZJ 
 
Join Date: Jan 2012
Location: hannover, nds
Posts: 12
any way to check the production date of an engine?

hi. we recently swapped an 5.2 engine. 93 preface lift vehicle. got a facelift engine. well, was bought as preface lift engine. now we got some problems like finding the right engine pressure sending unit/switch. seems like this part has changed from year to year with facelift cherokees. so is there any way to determine the year of made from the engine itself? like any serial number of engine which we might can track down?

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Unread 07-15-2013, 12:35 PM   #2
CatSplat
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1994 ZJ 
 
Join Date: Jul 2009
Location: Calgary, Alberta
Posts: 1,235
There's a date cast into the block. If I remember correctly, it's on the driver's side near the motor mount.
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Unread 07-15-2013, 12:35 PM   #3
AVR2
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1993 ZJ 
 
Join Date: Apr 2007
Location: UK
Posts: 2,472
Of course ZJ engines have serial numbers. According to the FSM, the 5.2L serial number is "stamped into a machined pad located on the left front corner of the cylinder block".

This is how you decode the number:
zj-engine-code.jpg

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Unread 07-15-2013, 12:49 PM   #4
scuba303
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1998 ZJ 
 
Join Date: Jan 2012
Location: hannover, nds
Posts: 12
thanks! going to check it tomorrow! great help!!!
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