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  1. 01-06-2023, 09:44 PM #1
    hooken203
    hooken203 is offline Junior Member
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    I just bought a 3.0 ProMax. Help with block ID

    I just bought what was represented as a 1999 3.0 liter ProMax It’s a basket case. I knew I was getting a different block but I would like to ID the block. Can I identify the block by it numbers. I also noticed that in the cylinders on the exhaust port there is a small notch that is on the top of the port in the center. I have been told this is to relieve compression when cranking. Do ProMax blocks usually have this notch?
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  2. 01-22-2023, 09:00 PM #2
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    native2
    native2 is offline 6000 RPM
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    To my knowledge the 300 promax didn't have the relief slots 250s did. My 99 300PMs don't have them
    ...
    Cawley
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  3. 01-23-2023, 09:36 PM #3
    hooken203
    hooken203 is offline Junior Member
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    What I have learned is by the block numbers Is it is indeed a ProMax 3.0 block built late in the year 1998.
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