IS F (2008-2014) Discussion topics related to the IS F model

Has anyone changed their alternator?

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Old 08-08-15, 06:01 AM
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Rickna
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Question Has anyone changed their alternator?

I've had the charging system checked twice and diags tell me it's the alt. It looks pretty much straight forward. 2 bolts on the bottom and 2 studs on top.
My question is does anyone know the size of the e-torx needed for the studs?
I appreciate any other tips as well.
Old 08-10-15, 05:38 AM
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Wow, nobody here has changed their alternator.
FIY: the studs are E8. They remove very easily.

Thanks
Old 08-10-15, 11:47 AM
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K2sInteg98
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Interested in knowing your voltage readings at idle after the alternator swap
Old 08-11-15, 04:31 AM
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I'll post it up as soon as it stops raining.
Old 08-12-15, 06:40 AM
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Battery voltage shows 14.38. The gage in the cluster shows 1 notch above the battery icon. Before the alt change it was 1 notch below the icon.
Old 08-12-15, 08:25 AM
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K2sInteg98
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Originally Posted by Rickna
Battery voltage shows 14.38. The gage in the cluster shows 1 notch above the battery icon. Before the alt change it was 1 notch below the icon.
Great numbers. The few times i've tested mine, the highest i've gotten was 13.4. You purchased this off rockauto, correct? Easy install? I might look into this if the price is cheap enough.
Old 08-12-15, 11:53 AM
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I know Meade916 on youtube has changed his alternator. He's a huge audiophile and hes on the forums but like once every year lol.
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Old 08-12-15, 01:28 PM
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Originally Posted by K2sInteg98
Great numbers. The few times i've tested mine, the highest i've gotten was 13.4. You purchased this off rockauto, correct? Easy install? I might look into this if the price is cheap enough.
The install was somewhat easy. There are 2 bolts on the bottom and 2 studs on top. You'll have to remove the air box for the top and the belly pan on the bottom. Took me just over 2 hrs. You could probably do it in less.

I did get it from Rock Auto-a rebuilt one. $220 shipped. $75 credit for the core return -$11 shipping.
Old 08-12-15, 01:46 PM
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Originally Posted by Rickna
The install was somewhat easy. There are 2 bolts on the bottom and 2 studs on top. You'll have to remove the air box for the top and the belly pan on the bottom. Took me just over 2 hrs. You could probably do it in less.

I did get it from Rock Auto-a rebuilt one. $220 shipped. $75 credit for the core return -$11 shipping.
How many miles do you have on yours? Just wondering when to start thinking about replacing the brushes.
Old 08-12-15, 06:25 PM
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Originally Posted by lobuxracer
How many miles do you have on yours? Just wondering when to start thinking about replacing the brushes.
19K miles. I am the 3rd owner.
Old 08-12-15, 09:17 PM
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darksi08
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Originally Posted by Rickna
19K miles. I am the 3rd owner.
That's crazy. What were the symptoms you were experiencing?
Old 08-13-15, 03:24 AM
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Originally Posted by darksi08
That's crazy. What were the symptoms you were experiencing?
It would go dead after 3-4 days of non use.
Old 08-13-15, 11:51 AM
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semnosNSX
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Originally Posted by Rickna
It would go dead after 3-4 days of non use.
Sounds more like a battery issue than an alternator issue if the battery isn't holding a charge after 3-4 days of no use.
Old 08-14-15, 04:21 AM
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Originally Posted by semnosNSX
Sounds more like a battery issue than an alternator issue if the battery isn't holding a charge after 3-4 days of no use.
I had the battery tested numerous times, it's ok. It's also less than 1 yr old.
Old 08-14-15, 04:41 AM
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I have also done parasitic drain tests-not easy on this car. And I have found none.


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