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Author Topic: 68 Alternator Fan  (Read 3692 times)
jeff68
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« on: May 24, 2011, 08:12:26 AM »

I have a 68 Camaro with the L30 327.  I seem to have an unusual alternator fan.  The alternator (and fan) are original to the car.
Has anyone ever seen a fan like this?

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68 L30 / M20 Convertible
Ash Gold
jeff68
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« Reply #1 on: May 25, 2011, 06:49:23 AM »

Here is an attached picture in case anyone has problems seeing the pic in the post above:
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68 L30 / M20 Convertible
Ash Gold
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« Reply #2 on: May 25, 2011, 07:12:11 AM »

Jeff,

Your first pic was just fine...I was assuming something else.

Can't help you with this one but it certainly looks like the fan and face of the alternator has been touched up.
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jeff68
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« Reply #3 on: May 25, 2011, 09:38:49 AM »

^Yes, the fan was painted and the alternator housing was refinished when it was rebuilt about 15 years ago.
I'm in the process of trying to get the finishes correct and noticed the fan doesn't look like all the other ones I have seen.
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68 L30 / M20 Convertible
Ash Gold
lakeholme
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« Reply #4 on: May 25, 2011, 10:05:24 AM »

Are you questioning the number of grooves in the blade?
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Phillip
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jeff68
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« Reply #5 on: May 25, 2011, 11:15:47 AM »

^Yes, as well as the shape of the blades and the number of blades.
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68 L30 / M20 Convertible
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Ed Bertrand
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« Reply #6 on: May 25, 2011, 11:34:51 AM »

It appears to have 13 blades which is incorrect for a first generation Camaro. With few exceptions (see below), just about every Chevrolet built in the 60's used the same 11 blade fan. However, if you look in the AIM on UPC 6 sheet A3 or A4, (And UPC K76 Sheet A1), you'll see what looks like YOUR fan!! 13 (?) blades and one groove on each blade!

What's the numbers stamped on your alternator?

Ed

« Last Edit: May 25, 2011, 12:07:38 PM by bertfam » Logged
jeff68
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« Reply #7 on: May 25, 2011, 01:53:35 PM »

Interesting.  Didn't think about checking the AIM.  Both my AIM and alternator are at the body shop with the car right now, so I don't have the alternator number.
Will the 2-letter code stamped (in ink) on it tell you anything?  I can get that easily from some old pictures I have.
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68 L30 / M20 Convertible
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jeff68
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« Reply #8 on: May 25, 2011, 06:12:02 PM »

The 2-letter code ink-stamped on the alternator is "BT" along with a blotch of red paint just to the right of the stamping.
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68 L30 / M20 Convertible
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Ed Bertrand
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« Reply #9 on: May 25, 2011, 07:18:43 PM »

"BT" doesn't look familiar, but I don't have a lot of 68 CBC's to go on. What are the numbers stamped into the housing itself?

Ed
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lakeholme
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« Reply #10 on: May 25, 2011, 07:36:19 PM »

Ed,
Didn't early 60s Corvettes use a 13 blade fan?
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Phillip
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« Reply #11 on: May 25, 2011, 07:45:23 PM »

Yes, you're right! And I think it was 1963 only.

John?

Ed

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KurtS
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« Reply #12 on: May 25, 2011, 10:05:42 PM »

Really need the numbers off of the alternator to really tell what's up.
Never seen a BT code alt.
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Kurt S
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Marty
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« Reply #13 on: May 25, 2011, 11:24:40 PM »

I have several 1100794 alternators and none have an ink stamp on them. Did they have ink stamps in 68?

Martin
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Martin Foltz
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68 Van Nuys Camaro
jeff68
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« Reply #14 on: May 26, 2011, 11:07:44 AM »

Not that it matters much for originality, but I was looking at the "Trans Am Camaros" section and noticed the following post.  Check out the alternator fan.  Looks just like mine.
Anybody have some good Trans-Am engine compartment photos they would like to post?

Here's one of the Dick Guldstrand Dana-sponsored Camaro. Notice the spacers under the
thermostat housing, possibly to elevate the upper radiator hose away from the fan belt.
Click here for comments about the water pump pulley.


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68 L30 / M20 Convertible
Ash Gold
Ed Bertrand
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« Reply #15 on: May 26, 2011, 11:39:10 AM »

I don't think so but it's hard to tell. I enlarged just that area and it looks like it might be the "normal" 2 groove pulley since they look to be "squared-off" edges on the blades and not the "half-round holes" like yours. But again, it's hard to tell from that picture.

Martin, I've never seen any codes stamped on a 68 alternator either, but according to the REPOP HOUSES, they were used. (Of course, according to the repop houses the "Caution Fan" sticker was also used, so there you go!!)

Ed

« Last Edit: May 26, 2011, 12:02:19 PM by bertfam » Logged
JohnZ
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« Reply #16 on: May 26, 2011, 12:11:32 PM »

The alternator fan shown in the photos at the beginning of this thread is a one-year-only design from a '63 Corvette (and possible other '63 usages); easy to identify due to the 13 blades that are all the same size and shape, each with the little half-moon cutout on the vertical edge. All alternator fans from '64-up had fewer blades, with at least two blades (sometimes more) that had a different size and shape, to reduce/eliminate alternator fan "whine" or "moan" complaints. Somewhere along the line the one in the photo replaced the original fan.
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jeff68
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« Reply #17 on: May 26, 2011, 12:27:49 PM »

The thing is that my father bought this car new.  He never replaced the alternator or alternator fan.  
I hate to replace parts with "correct" ones that do not match what was originally on the car.
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68 L30 / M20 Convertible
Ash Gold
jeff68
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« Reply #18 on: May 26, 2011, 12:40:00 PM »

I don't think so but it's hard to tell. I enlarged just that area and it looks like it might be the "normal" 2 groove pulley since they look to be "squared-off" edges on the blades and not the "half-round holes" like yours. But again, it's hard to tell from that picture.
You're right, it's hard to tell for sure, but I thought they looked like the half-round holes.
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68 L30 / M20 Convertible
Ash Gold
Ed Bertrand
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« Reply #19 on: May 27, 2011, 11:07:15 AM »

Well, like Kurt said, we really need the numbers off the alternator to see what's going on.

Ed
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