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#4072324 - 07/30/20 06:53 AM Alternator amperage
bbowwler Offline
n00b

Registered: 08/29/19
Posts: 11
Loc: NY
2011 PI 4.6 V - When needing to change the alternator, how do you know which amperage to buy ? Thanks

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#4072340 - 07/30/20 10:02 AM Re: Alternator amperage [Re: bbowwler]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19766
Loc: I can see Detroit from here!
Should be a 200a unit if its a police car, sometimes shown as a 220a. Civilian cars used a 135a 6G alternator.
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#4072446 - 07/31/20 12:55 AM Re: Alternator amperage [Re: bbowwler]
Lance01 Offline
Member

Registered: 04/02/18
Posts: 326
Loc: Pa
In addition to what BigMerc96 said make sure the new or rebuild alternator comes with a decoupler pulley.

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#4072452 - 07/31/20 08:43 AM Re: Alternator amperage [Re: bbowwler]
2008interceptor Offline
Over the Hill

Registered: 09/02/02
Posts: 3130
Loc: Pennsylvania
O'Reilly I know sells ones with decouplers mine is a new Odyssey gold, they sell rebuilt also with decoupler. You may want to do the tensioner and belt if they haven't been changed.
_________________________
2008 Ford Crown Victoria Police Interceptor P71 with street appearance package.

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