Alternator Upgrades

[swoody]

Sounds like the bearings in my alternator are protesting about being submerged in mud. I vaguely remember a post about upgrading to a higher amperage Grand Cherokee alternator??? Can't seem to locate the information as to what's involved, which model Alternator etc.

I probably have a second hand Xj alternator lying around somewhere, but if its not to expensive to upgrade??

[junglejuice]

That most likely would have been my post, I swapped out my stock 90a unit and fitted a Zg 136a unit, for me it meant that the mounts needed to be changed as I have a 95 with the auto tensioner and the larger alternator won't fit this mount so I had to change over to the manual tensioner to allow it to be fitted.
As yours is a 96 it will already have the manual tensioner so it will be a straight bolt in fit....

[Escapable]

Hey JJ, the pic is of the test data sheet that I received with my replacement 2 years ago - it shows what can come out of the ZG unit (Hwy cruise RPM is around the 2.2 mark). It gives an idea if what can be expected from a typical alternator.

[swoody]

Thanks guys, pulled the belt of today and most of the noise appears to be coming from the lower idler pulley, so I may hold off on the alternator for a bit, but when I do buy a newy it will be a Zg alternator

[anthonygubbin]

Originally Posted by swoody

Thanks guys, pulled the belt of today and most of the noise appears to be coming from the lower idler pulley, so I may hold off on the alternator for a bit, but when I do buy a newy it will be a Zg alternator

Seems a common thing. There is a Ford one that replaces the plastic pully and works out to about $35 cheaper. The steel pully is probably shot as well but with that one you can replace the bearing. I just did both of mine for under $50 all up.

Regards A

[swoody]

You wouldn't have a part number or something would you? How did you work out the ford one was the same?

[swoody]

Pulled both pulleys out just now and they are both steel and both look like the bearings press out. I will go to the bearing shop tomorrow and get a couple of newys.

I have decided to replace the alternator anyway so advice on where to buy a new Zg alternator would be greatly appreciated.