Alternator Housings
Thread Starter
Racer
Joined: Apr 2015
Posts: 361
Likes: 4
From: Ohio
Alternator Housings
I have a '71 LS-5 w/ AC. I bought a replacement alternator for it but ground bolt on the back interferes with the valve cover. I really don't want to spend hundreds of dollars for the correct alternator. I was thinking I could find a core and just swap the rear housings.
Anyone know what other years or makes might work? Searched ebay and can't find one with the bolt hole in right location.
Any other ideas?
Anyone know what other years or makes might work? Searched ebay and can't find one with the bolt hole in right location.
Any other ideas?
Pro
Joined: Sep 2017
Posts: 516
Likes: 72
From: Modesto California
I have a '71 LS-5 w/ AC. I bought a replacement alternator for it but ground bolt on the back interferes with the valve cover. I really don't want to spend hundreds of dollars for the correct alternator. I was thinking I could find a core and just swap the rear housings.
Anyone know what other years or makes might work? Searched ebay and can't find one with the bolt hole in right location.
Any other ideas?
Anyone know what other years or makes might work? Searched ebay and can't find one with the bolt hole in right location.
Any other ideas?
It sounds like your replacement alternator wasn't "clocked" the same way your original was. Just pull it apart and rotate the rear housing 90 degrees counterclockwise.
Thread Starter
Racer
Joined: Apr 2015
Posts: 361
Likes: 4
From: Ohio
Thread Starter
Racer
Joined: Apr 2015
Posts: 361
Likes: 4
From: Ohio
Pro
Joined: Sep 2017
Posts: 516
Likes: 72
From: Modesto California
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
The mounting ears are on the front cover so I don't see why you can't clock it to rotate the back cover.
At any rate, to clock it you rotate only the front case half around the stator and rear case half. NEVER try to rotate only the rear case half because you'll just damage the internal wires between the stator and the rectifier.
At any rate, to clock it you rotate only the front case half around the stator and rear case half. NEVER try to rotate only the rear case half because you'll just damage the internal wires between the stator and the rectifier.
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Melting Slicks
Joined: Dec 2000
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From: Lansdale 19446 PA
2024 C3 of the Year Finalist- Unmodified
St. Jude Donor '10-'11, '15, '19
How about getting a little longer V Belt? That will move the alternator away from the valve cover towards the fender. That is, if there is enough room to do so.
Thread Starter
Racer
Joined: Apr 2015
Posts: 361
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From: Ohio
Drifting
Joined: Nov 2002
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From: Blue Bell PA
2018 C3 of Year Finalist
Nope,on a big block the rear housing should be clocked at 12 o'clock
The plug should be at 12 o'clock.pull the pulley,remove the 4screws,
Pull the housing slightly,I said slightly keeping the armature in the rear
Housing and turn a quarter of a turn if you pull it to far ,PM me. Not hard to do.
The plug should be at 12 o'clock.pull the pulley,remove the 4screws,
Pull the housing slightly,I said slightly keeping the armature in the rear
Housing and turn a quarter of a turn if you pull it to far ,PM me. Not hard to do.
Race Director
Joined: Apr 2007
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From: South Western Ontario
Don't remove the pulley. Stand the alternator on the pulley end and push the front housing down so you can rotate it. That way, the rear housing is sitting on the armature shaft so gravity keeps those 2 parts together and the slip rings don't get pulled out of the brushes.
Pro
Joined: Sep 2017
Posts: 516
Likes: 72
From: Modesto California
Don't remove the pulley. Stand the alternator on the pulley end and push the front housing down so you can rotate it. That way, the rear housing is sitting on the armature shaft so gravity keeps those 2 parts together and the slip rings don't get pulled out of the brushes.
Heck it only takes me 15 seconds to stuff the two brushes back into the brush holder then stick a toothpick thru it to retain the brushes. Big whoopee.
Melting Slicks
Joined: Jul 2010
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From: perth western australia
