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Engine Specific Info and Questions => TDI Engine -General Info => Topic started by: 8v-of-fury on January 29, 2011, 06:31:37 pm

Title: 1998 Jetta AHU, what alt does it have stock?
Post by: 8v-of-fury on January 29, 2011, 06:31:37 pm
I was wondering what amp alt my TDi motor has on it from the factory?

It was an A/C model if that helps any.
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: G60ING on January 29, 2011, 06:59:46 pm
Quote from: 8v-of-fury on January 29, 2011, 06:31:37 pm
I was wondering what amp alt my TDi motor has on it from the factory?

It was an A/C model if that helps any.

120amp
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: catlin_cava on February 01, 2011, 09:37:51 pm
120??? I would figure a 90AMP, my ALH TDI only had a 90 on it
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: BigVWman on February 01, 2011, 10:03:13 pm
my 98 ahu has 120 but my neighbors 97 only had 90.
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: catlin_cava on February 01, 2011, 10:04:46 pm
120amp must be an upgraded unit, the highest i've ever seen on a MK3 motor was a 90AMP Unless its a VR
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: 8v-of-fury on February 01, 2011, 10:14:32 pm
weird. When ordering a replacement online I can order either 90 or 120 amp..

How do I tell by looking at what I have to determine 90 or 120?
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: catlin_cava on February 02, 2011, 04:00:18 am

When in doubt takd a bigger one lol! I'm running a 120 right now, we got it when my 90 pooched while on a trip and it was the only thing we could get
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: BigVWman on February 02, 2011, 08:40:49 am
Quote from: 8v-of-fury on February 01, 2011, 10:14:32 pm
weird. When ordering a replacement online I can order either 90 or 120 amp..

How do I tell by looking at what I have to determine 90 or 120?
The 120 has a big "120" on the rear black plastic housing, the 90 has a big "90" :)
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: 8v-of-fury on February 03, 2011, 12:28:45 am
oh really?! Why is crap like that so simple ;) I wish all alts, or anything electronic had all its needed to know info clearly stated!
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: Sandy on February 16, 2011, 08:54:58 am
The AHU TDI used a 120 amp because of the glow plugs in the cooland flange for the heater.
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: the caveman on February 16, 2011, 10:07:14 am
An ALH may only have a 90 amp if it's automatic, because it doesn't have the extra coolant glow plugs
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: 8v-of-fury on February 16, 2011, 02:01:07 pm
5spd CTN O2A ;)

So am I safe to say 120amp? Lol
Title: Re: 1998 Jetta AHU, what alt does it have stock?
Post by: the caveman on February 16, 2011, 06:09:33 pm
Quote from: 8v-of-fury on February 16, 2011, 02:01:07 pm
5spd CTN O2A ;)

So am I safe to say 120amp? Lol
Yes my son