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  1. #1
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    HELP.....Johnson V8...How do you know if it's a 4.0 Litre Block

    There are no serial number stickers on the engines. The FREEZE PLUG #0433002...how else can I find out if it's a 4.0 Litre Block...???

  2. #2
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    part of the head gasket sticking out at the top by chance?
    if it has finger port bosses its a 4.0 but that was later ones
    3.6 had twin pack ignition ( but that could of changed)
    I think a dealer can run the serial number

  3. #3
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    Pull a spark plug and look down the bore. Rotate the FW until you can see the piston edges. 3.6's used a flat top piston. 4.0's had a domed piston. You can see the dome start about 1/4" or so from the edge of the piston.
    Keith-

  4. #4
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    This thread had a good bit of info: http://www.screamandfly.com/showthre...ning-Year-Help
    Keith-

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