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08-31-2016, 11:31 PM
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#1 |
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Registered User
Join Date: Dec 2014
Location: Torrance, ca
Posts: 32
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Why?
Why are most alternators mounted on the left side and some mounted on the right. I've seen both ways with pwr steering. A/C requires a left mount. This isn't a problem...I just cannot arrive at a logical reason. My v8 '69, no a/c, PS, is mounted on the right and impedes where I want to mount a filter and fuel pressure gauge. Insight needed.
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08-31-2016, 11:45 PM
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#2 |
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Senior Member
Join Date: Nov 2003
Location: Brookings, SD
Posts: 10,497
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Re: Why?
IIRC they changed to the right side mount and long water pump in 1973. Your truck would have had the short water pump and left side mount originally.
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Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs. |
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09-01-2016, 12:01 AM
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#3 |
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Registered User
Join Date: Jun 2015
Location: @
Posts: 890
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Re: Why?
from what I read on here it has something to do with the power output of the alternator look on here for mad electric in one of the alternator conversion threads from external to internal
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09-01-2016, 07:22 AM
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#4 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: Why?
These alternators were mounted on the driver side with A/C on the passenger side. Anything different is later.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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09-02-2016, 01:22 AM
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#5 |
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Active Member
 Join Date: Jun 2016
Location: Salida, CA
Posts: 177
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Re: Why?
As for why, I figured the reason was they had radiators with the hole in the top on the drivers side, and it was cheaper to move the accessory drive around than get new radiators. So they wanted to put the alternator on the passenger side to make it easy routing the top hose.. Then the gargantuan AC compressors start showing up, and they'd rather put those on the passenger side because it was easier to route all the AC crap on the same side as the evap box, and moving the alt to the driver side was cheaper.
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David Larsen 1970 Chevrolet C-10 |
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09-02-2016, 01:42 PM
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#6 |
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Registered User
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,189
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Re: Why?
Yeah, there's no logical reason why they get mounted to a certain point sometimes. Engineers have a mind of their own. Automotive technicians and automotive engineers will rarely see eye to eye, with one trying to remove every last inch of workable room, and the other trying to gain every last inch of workable room.
There's both alternators and AC systems on both sides of a vehicle depending on year. |
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09-02-2016, 01:56 PM
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#7 |
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Why?
Just speaking extemporaneously, the AC system is always on the passenger side, so to keep the lines shorter, it makes sense to have the pump on the passenger side. So that moves the alternator to the driver's side. How much this actually influenced their decisions I don't know, but AC would be becoming more and more common as the years went by.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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09-03-2016, 12:32 AM
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#8 |
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Registered User
Join Date: Dec 2014
Location: Torrance, ca
Posts: 32
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Re: Why?
Thanks to all who answered. I feel somewhat better now, but I have this hang up when I don't know the "whys" on changes and/or alterations. Thanks again. RonG
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