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supertech, master tech
Category: Jeep
Satisfied Customers: 2251
Experience:  a1-a8,l1,t2,b5.ASE triple chrysler master tech 42yr experience HEV chrysler Specialist
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The block is original the number on block is 503co1 and the vin number

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how do you determine if the number on the block is original the number on block is 503co1 and the vin number is XXXXX any help would be greatly appreciated.
Hi my name is john.

The first digit is the year 1985

the 2/3 digit is month march

the 4 digit is the type of jeep C is a 4.2L engine

5/6 digit is the day of the month 1 day of the month

let me know what else you need.

If i have help you,please push the accept button when were done.

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