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Do the 3100 and 3400 have the same crankshaft?

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  • Do the 3100 and 3400 have the same crankshaft?

    Hello. I just dropped the oil pan on a used 3400 I bought to replace the tired 3100 in my lumina and the crankshaft has 3.1 stamped on it! Do these motors use the same crankshaft?

  • #2
    Yes, they do.

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    • #3
      I have always found it funny when I pulled the crank on a 3400 and it has 3.1L cast in it.

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      • #4
        Yeah, it made me a little nervous to say the least.

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