IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Hill1430 on August 30 2022, 10:37:02 AM

Title: 140 Amp Alternator
Post by: Hill1430 on August 30 2022, 10:37:02 AM

Has anyone installed a 140 amp alternator from a 96 Impala 5.7 engine? I have watched a video and read that it is a direct swap. I purchased an AC Delco alternator and the two ears and clocking are good. The problem I see is the bolt for the back side of the alternator will not work for the bracket from the exhaust manifold. Also the pulley is about 3/16" in diameter smaller. Thoughts or suggestions? Should I leave well enough alone and go with another 120 amp alternator?

Title: Re: 140 Amp Alternator
Post by: Steve Wood on August 30 2022, 11:00:30 AM

I don't have a back brace on either car of mine.   Have not had one since the '90's.

It is a better built alternator and runs cooler.  I did not notice the pulley being smaller but that will allow it to put out more amps at low rpm if you needed them.  My choice for alternators when someone needs one.

Title: Re: 140 Amp Alternator
Post by: Shimy87 on August 30 2022, 11:26:06 AM

same here, works great

Title: Re: 140 Amp Alternator
Post by: Hill1430 on August 30 2022, 02:10:54 PM

Appreciate the replies. I will go ahead and install it.

Title: Re: 140 Amp Alternator
Post by: xracerx13 on September 01 2022, 06:22:35 PM

I just had my original rebuilt with 140A internals

Title: Re: 140 Amp Alternator
Post by: ~JM~ on September 03 2022, 11:39:19 PM

Smaller drive pulley?

Check the clearances around the tensioner pulley. Sometimes it makes contact with nearby bolt.

Run shorter TTA belt.

Title: Re: 140 Amp Alternator
Post by: Hill1430 on September 08 2022, 10:04:42 PM

Clearance is good. Now you have me thinking which belt to use.

Title: Re: 140 Amp Alternator
Post by: ~JM~ on September 09 2022, 12:04:59 AM

Quote from: Hill1430 on September 08 2022, 10:04:42 PM

Clearance is good. Now you have me thinking which belt to use.

1989 Turbo Trans Am belt is slightly shorter & works well.

See the end of the bolt from the A/C compressor mount? The tensioner pulley was tapping against it.

Title: Re: 140 Amp Alternator
Post by: Steve Wood on September 09 2022, 09:36:58 AM

https://vortexbuicks-etc.com/serpentine_belt.html

Title: Re: 140 Amp Alternator
Post by: Hill1430 on September 15 2022, 11:17:10 PM

I am having a heck of a time trying to find a belt. :x

Title: Re: 140 Amp Alternator
Post by: ~JM~ on September 16 2022, 01:34:06 AM

Gates Micro-V K060630

Fairly certain I ordered it through O'Rielly's.

Title: Re: 140 Amp Alternator
Post by: Hill1430 on September 18 2022, 10:31:00 PM

Cool. Thanks!