140 Amp Alternator

[Hill1430]

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?

[Steve Wood]

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.

[Shimy87]

same here, works great

[Hill1430]

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

[xracerx13]

I just had my original rebuilt with 140A internals

[~JM~]

Smaller drive pulley?

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

Run shorter TTA belt.

[Hill1430]

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

[~JM~]

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.

[Steve Wood]

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

[Hill1430]

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

[~JM~]

Gates Micro-V K060630

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

[Hill1430]

Cool. Thanks!