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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Kody021 on May 08, 2010, 08:44:22 pm

Title: 87 & 91 5.7 TBI Alternator Delima
Post by: Kody021 on May 08, 2010, 08:44:22 pm

I have a 87 C10 5.7 TBI that I just put a 91 3/4 ton 5.7 TBI in and the Alternator Plugs are different. It looks like they both have the same pulley, but my question is do the alternators turn the same direction, or is one a reverse rotation? If someone could help I would be grateful. Both alternators have a serpentine style pulley, not the v-belt pulley style. They have different connector plugs though, so any ideas? Thanks  

Title: Re: 87 & 91 5.7 TBI Alternator Delima
Post by: Irish_Alley on May 09, 2010, 02:27:28 am

I'm sure they turn the same way. i would try to keep the 87 on on there so the plug would be easer to mess with

Title: Re: 87 & 91 5.7 TBI Alternator Delima
Post by: Kody021 on May 09, 2010, 07:16:24 am

Yeah that's what I was wanting to do cause I'm not comfortable changing wiring. Thanks.

Title: Re: 87 & 91 5.7 TBI Alternator Delima
Post by: Irish_Alley on May 10, 2010, 12:36:24 am

it should be easy, just do it