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Threw my first alternator


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#1 okjorg

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Posted 12 June 2018 - 06:26 PM

Hi guys!

I have thrown my first alternator EVER after cruising over the weekend in my 77 LX Torana.
Save her Amy further heartache though and she is in the shed safe with the current bracket - ok.
She has a 350 Chev and I am trying to learn as much as I can about what I should put back in her.

I am not running much, apart from the ignition, the cooler fan and the stereo. Please let me know what I should be looking at to put her back together and make her purrr again.

At the moment the part # showing is
0 120 488 314
which comes up in my hunt as a Bosch BXH1236A.
I want something around 70A and chrome - nice and lovely looking, but also something that will do the job.

Thanks very much,
Caz


https://uploads.tapa...6ff77e0c0d.heic



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#2 rodomo

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Posted 12 June 2018 - 10:10 PM

Gilmer drive? Hi stall convertor?



#3 okjorg

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Posted 13 June 2018 - 05:04 AM

*Saved her from further damage by carefully getting her home and back in the shed.... I was actually pretty lucky I stuck close to home....... in the end I’d lost a bolt.... and the belt shunted the alt over into the casing.....
yes Gilmer drive and no, no hi stall converter-

Hope this helps??
Thanks
Caz


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#4 okjorg

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Posted 13 June 2018 - 05:06 AM

*Saved her from further damage by carefully getting her home and back in the shed.... I was actually pretty lucky I stuck close to home....... in the end I’d lost a bolt.... and the belt shunted the alt over into the casing.....

Yes Gilmer drive and no, no hi stall converter.

Hope this helps??
Thanks
Caz


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#5 TerrA LX

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Posted 13 June 2018 - 08:19 AM

Hope the damage wasn't too great.



#6 LXCHEV

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Posted 13 June 2018 - 09:04 AM

Did the bolt actually snap?

There are lots of different brackets available.

I used to run a Gilmer drive on my Chev, but it was prone to snapping alternator bracket bolts, and chewing belts. Ended up going back to standard v-belt.

However plenty of people run gilmer’s with no issues, so just ensure your bracketry is appropriate and that everything is perfectly aligned.

I’d suggest installing an 85A alternator (Bosch do a universal fit one). I’m not sure what chrome options are available off the shelf.

#7 Rockoz

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Posted 13 June 2018 - 11:07 AM

Gilmers do have a tendency to stuff the front alternator bearing.

Usually the alternator is mounted a fair distance away from the next pulleys in the system.

You could probably prolong the life by not having the belt so tight, the teeth will stop it slipping.

There is a huge amount of sideways pull on the bearing which increases the further you are away from the next pulley.

 

For reliability, I would go back to a V belt, or look at modifying it for a serpentine belt.

The serpentine would be the best option in terms of life of components.

 

As for a replacement, there are so many options to choose from.

Some will be direct replacement, others will require some mods.

From memory there was a Holden style alternator as an option that was rated at around 85A.

 

If you cant find a chromed or polished option, they are easy enough to pull apart and polish, then coat with clear to keep the finish.

If it has an inbuilt regulator, it makes the job even easier.

 

If it was the bearing that went, I would be looking at the water pump as well.

They dont like the increased pressure either.






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