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Denso vs Bosch Alternator

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  • #1

    Question : Denso vs Bosch Alternator

    Just a question for you guys here. I am in the process of swapping a 3400 into my Cavalier and I am coming up with some slight issues. The guy I got the motor from said it came out of a 2003 Impala. The issue that I am coming up with is the alternator on the motor is one of the Bosch ones, and according to the lookup at Advance Auto (where I work) it says that the Bosch alt only came on the 04/05 Impala. I am just trying to figure out if there was any difference between the 2 wiring wise because I am about to start making a new custom harness and need to know the exact pin outs and if there is any difference between the connectors for the 2 alts.

    If anyone has any insight on this I would greatly appreatiate it.

    Thanks, Jeff
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  • #2
    Year of cavalier would help this...

    Got Lope?
    3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
    Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
    Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
    12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

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    • #3
      Assuming this is a Gen2 J-body swap, you won't be using the newer alternator anyway, you need to swap to the alternator bracket and alternator that came on the V6 in the Gen2 J-body. If you don't the alternator will hit the firewall under acceleration.

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      • #4
        Sorry about the long time between posts, but the car is a third gen cav. I'm hoping that I can just use the alt that I have but if not I guess that will be one more part to add to the list.

        Sent from my SPH-L710 using Tapatalk

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        • #5
          Ahh, 3rd gen swap...

          I don't recall the details of such a swap, j-body.org should have some information about that, it seems to be, or at least used to be a mainly 3rd gen site, and I know there were a few V6 swaps done in 3rd gens and documented there.

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          • #6
            Looks like it should fit, just mainly curious about the wiring, and figured since this is a 60° v6 site I would find the answer here.

            Sent from my SPH-L710 using Tapatalk

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            • #7
              Yes, this is a 60 degree v6 site, but your issue lies in chassis fitment, not engine fitment. So your best source of information is a site that is chassis based.

              There might be some information here about a similar swap to yours, but it doesn't seem common here.

              I'm not trying to push you away from this site, just trying to guide you to possible more relevant info.

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              • #8
                use a 88-89 beretta bracket and an alt for a 00+ GA 31/3400 iirc.
                Lifting my front wheels, one jack at a time.

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