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AdminAdmin- Posts : 38
Join date : 2018-04-07 
4.0L Engine Date Codes
Sat Apr 07, 2018 5:13 pm
4.0L 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).
FOR EXAMPLE: Code * 801MX12 * identifies a 4.0 Liter (242 CID) engine with a multi-point fuel injection system and 8.7:1 compression ratio that was built on January 12, 1998.
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).
FOR EXAMPLE: Code * 801MX12 * identifies a 4.0 Liter (242 CID) engine with a multi-point fuel injection system and 8.7:1 compression ratio that was built on January 12, 1998.
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