GE/GTE Same Alternator?

[s.u.p.r.a]

Hey all,

I haven't been able to keep my battery charged in my 89 with a swapped 7mGTE in it. When it's cold, the engine starts to misfire and then eventually dies. When I leave it overnight it won't start in the morning without a jump.

I'm using the alternator from my old engine (7MGE) which I know works fine. Will it work with my turbo engine or do I need a bigger one?

Could anything else be causing this?

Thanks for any info,
Alex

 

[ms07s]

It should work fine I think they are the same. sounds like a battery issue, get it tested.

 

[IJ.]

GTE has a bigger shaft more amps and a larger + Terminal post but a GE one will bolt in it's place. (I use GE here)

 

[s.u.p.r.a]

Thanks for the replies.

So assuming the alternator is good and works fine with the GTE, where should I start looking for this mysterious electrical leak?

 

[ms07s]

Thanks for the replies.

So assuming the alternator is good and works fine with the GTE, where should I start looking for this mysterious electrical leak?

Corroded Battery terminals, loose/bad battery cables, loose alt belt, bad battery....check those.

 

[s.u.p.r.a]

Checked all those already heh.

I replaced the battery and tightened everything down. Alt. belt is as tight as it should be.

Stumped. :runaway:

 

[Jeff Lange]

Depends on year/model. Some options did result in the same alternator across the GE and GTE.

That being said, they are totally interchangeable. 1988+ GTE's are all 80A, so those are the best alternators to get.

 

[plaaya69]

My 87 Turbo came with a 70 amp 7mge alternator but about your problem, I know you said that the alternator is in working condition but I would have it retested and also recheck your terminals on the anternator.

 

[Jeff Lange]

Early 87 7M-GTE's came from the factory with 70A alternators.

 

[IJ.]

Depends on year/model. Some options did result in the same alternator across the GE and GTE.

That being said, they are totally interchangeable. 1988+ GTE's are all 80A, so those are the best alternators to get.

GTE alts have an 8mm + Post that wont fit in the NA harness 6mm hole.
(just a heads up)