jimoshel Posted April 17, 2015 Share Posted April 17, 2015 I am trying to determine the year of a 4.0 engine I have and did not label when I pulled it. Any help appreciated. The tag on the distributor reads 53021352M 9 357 47 88 553537 PLT B/CODE YR DATE 560 NUM I am assuming this means it is an 1988. Anyone help? DON?? Link to comment Share on other sites More sharing options...
Marine1Texas Posted April 17, 2015 Share Posted April 17, 2015 renix 4.0 1988 Link to comment Share on other sites More sharing options...
jimoshel Posted April 18, 2015 Author Share Posted April 18, 2015 Tnx Noriyon. I suspected that's what it was but wasn't sure. One thing threw me off it has the Chrysler Penta Star logo all over it. I didn't think they started doing that until '91 or 2. Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 18, 2015 Share Posted April 18, 2015 The best way to tell what engine block you have is by the code stamped on the block below the spark plug holes. Example: 401MX12 Decoded:* 4 = Year (1994)* 01 = Month (January)* MX = Engine Type/Fuel System/Compression Ratio (MX is a 243 CID, multi-port fuel injection system with 8.8:1 ratio* 12 = Day of month of engine build Casting numbers are also on the 4.0 blocks as follows: Year Casting No1987-90 530055351991-95 530084051996-97 530205691998-98 530103411999-04 53010449 Link to comment Share on other sites More sharing options...
jimoshel Posted April 18, 2015 Author Share Posted April 18, 2015 Don. According to your chart, it's a '93. TNX buddy. :thumbsup: Link to comment Share on other sites More sharing options...
Marine1Texas Posted April 18, 2015 Share Posted April 18, 2015 the casting number match's 1987-90 casting. Unless they made the casting after? I have a 1987 and your casting match's mine! Link to comment Share on other sites More sharing options...
cruiser54 Posted April 18, 2015 Share Posted April 18, 2015 The best way to tell what engine block you have is by the code stamped on the block below the spark plug holes. Example: 401MX12 Decoded: * 4 = Year (1994) * 01 = Month (January) * MX = Engine Type/Fuel System/Compression Ratio (MX is a 243 CID, multi-port fuel injection system with 8.8:1 ratio * 12 = Day of month of engine build Casting numbers are also on the 4.0 blocks as follows: Year Casting No 1987-90 53005535 1991-95 53008405 1996-97 53020569 1998-98 53010341 1999-04 53010449 That's^^how you do it. Link to comment Share on other sites More sharing options...
Incommando Posted May 7, 2015 Share Posted May 7, 2015 nevermind Link to comment Share on other sites More sharing options...
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