I recently upgraded a 2000 civilian crown vic from a 4g civilian alternator to a 6g police unit.

The swap added some additional charging ability (110 amps vs 130 amps). But was mainly done because the voltage regulator in the original 4g unit had failed and was no longer charging the battery. And I had a spare 6g police alternator avaliable, but didn't have any 4g crown vic alternators at the moment.

Since the 6g alternator was factory installed in our cars, all of the necessary brackets and wiring are avaliable from either your local ford dealer or the local salvage yard.


The "new" 6g alternator is on the left, the old broken 4g alternator is on the right



here's a top view of the alternators. notice the different regulator connector and the different orientation of the output stud



here's the regulator wiring pigtail to splice onto the civilian vehicles harness so that a police unit can be installed





here's the factory civilian charging harness. for my purposes, i'll cut off the civvy regulator plug and splice on the police one. the output stud wire has a little different contour to it near the terminal, but can be bent into shape with my bare hands



here's the support brackets for the alternator. the one on the left is the police 6g unit, the one on the right is the civilian 4g





here's the police alternator mounted on the civvy engine block



and here's a picture of the two regulator plugs side by side



and here's a police interceptor with a factory installed 6g alternator for reference

Thanks 2v!

I have a 2002 Crown Victoria LX, how would I know what I have currently installed on my car? Should I assume that it is also the "4g" unit?

Is there any benefit to a civilian car, when going to a higher amp unit? I don't have anything crazy installed. I have all the factory options installed on the car, plus I also have a trailer hitch, and an aftermarket amp (which I've concealed behind the spare tire).

Does the beauty cover still fit properly?


Thanks!!!

That is one high performance alternator!

Bear in mind that Matt could straighten an alloy wheel with his bare hands...

Nice writeup, Matt... Now put a post in the BOK!

I am considering upgrading my alt in my CVPI. Anybody hear anything about This Place

I am looking at getting this alt for my car... Here are the specs



Any input....

I downgraded the Alternator to a Civy on a 1994 P71, same idea but even easier as no support bracket to worry about.

American Armature looks like the solution for some folks. If bat voltage is dropping at idle time to upgrade. My requirements went down when I got rid of elect fan and the 95amp civy can handle my basic sound system.

http://www.alternatorparts.com/Crown_Victoria_Alternators.htm

I used this. I got the 200 HO unit.

Very good quality, all new.

i can carry a crown vic transmission up a flight of stairs with my bare hands. haven't tried straightening an alloy wheel yet though.

Excuse my noob-ness questions, but.
- What is the difference between the civi bracket and the CVPI bracket?

- Would it be possible to snag a CVPI alty from the bone yard and just grab the wiring harenss & bracket? I'm assuming you had to get a new wire a new alternator plug on to your existing wiring.

Last Question (sorta related)
- I plan on replacing the serpentine belt soon, with the removal of the alternator, could I get the old belt off and the new belt on without having to loosen the tensioner?

the brackets are a different length between the civi and police cruisers.

when shopping for these brackets, keep in mind that the brackets for crown vics with the aluminum crossover intake manifold are different than the brackets for crown vics with the plastic x-over coolant passage.



Yes, you could grab the alternator, harness plug and bracket from a wrecked police cruiser in a salvage yard. But do keep in mind that the regulator harness plug plastic often gets brittle from the engine heat attacking it over the years. But also keep in mind that the harness pigtail pictured above costs close to $30 at your local ford dealer.




The tensioner in our cars is really easy to loosen tension on. Just stick a 3/8" or 1/2" breaker bar in the hole and twist. And you don't have to completly remove the serpentine belt from the engine to replace the alternator either.



picture of civvy upper alternator bracket next to police upper bracket

I should add that the 2000 crown vic lx mentioned in this thread has the digital dash option. So there wasn't a voltage guage inside the car like on the analog cluster. And the regulator inside the alternator also failed in such a way that the charge fault indicator light on the dashboard did NOT illuminate even though battery voltage was so low that the electronic ignition system wasn't functioning properly.

When I'm sitting at an intersection, obviously foot on brake & turn signal on, my AC fan speeds up & slows down with each blink of the turn signal. Would changing to a higher rated alternator solve this problem?

TS-pa,

do you have underdrive pulleys??

could it be possibkle to add the new 07 200 amp alternators on my 03 cvpi? wihtout to much modifacation ?

Speaking of alt swaps...can a 2000 CVPI alt be installed in a 92 CV without modification? If mods are needed...what would they be? I have a 2000 CVPI parts car with working alt. The 92 CV's alt is going abd needs to be changed soon. Thanks.