dogdog130

i need to try to figer out what engine in my jeep owner before me got a engine put in it it a inline 6 but dont know what year so anything where the vin on the engine block and i got some numbers off it but idk what it is 702m27

tj40

no vin on block, it will have a casting number or part number on the block. It may have a date # on it, others will chime in.

dogdog130

i looked at 3 other 87 none of the engines the same as mine

93gc40

What is the problem? Depending on the issue you are having it may not matter. If you know what part is failing you could pull it and then match it a the parts store. If you can find the same part, you will at least figure out what range of years it is.

Clint Holland

OLD THREAD: Issue is buying 99 Cherokee w/ replaces engine. Want to see if oringinal motor or not. ???

cruiser54

4.0 Engine date codes

The date code is on the passenger side of the engine, on the block, just forward and up from the distributor on a machined flat surface.

The digits of the code identify:
 1st Digit-The year (8 = 1998).
 2nd & 3rd Digits-The month (01 - 12).
 4th & 5th Digits-The engine type/fuel system/compression ratio (MX = A 4.0 Liter (242 CID) 8.7:1 compression ratio engine with a multi-point fuel injection system).
 6th & 7th Digits-The day of engine build (01 - 31).
1. FOR EXAMPLE: Code * 801MX12 * identifies a 4.0 Liter (242 CID) engine with a multi-point fuel injection system, 8.7:1 compression ratio and built on January 12, 1998.