C2 Alternator Pulley

[Robert T.]

Can anyone tell me if this alternator pulley/fan configuration looks correct for a 66 327/300 w/K19 (if that matters). No power or AC. Seller says it measures 2 and 3/4 inches (I'm assuming that's 2 15/16 per the JM.)


Thanks for any help you can offer.

bob

[Wayne M.]

Re: C2 Alternator Pulley

Can anyone tell me if this alternator pulley/fan configuration looks correct for a 66 327/300 w/K19 (if that matters). No power or AC. Seller says it measures 2 and 3/4 inches (I'm assuming that's 2 15/16 per the JM.) ...

Bob -- the alternator itself looks like a correct 10DN type. Has the seller given you the 1100693 stamp, 37 amp, and and appropriate date ?

As for the pulley with integrated fan (speaking as a '65 owner without benefit of the '66 AIM or TIM&JG), it seems similar to the one on the left in the big pic below, which has 11 blades and no reinforcing ribs like the pulley on the right.

According to the Chev parts catalog [Oct '66], K19 should not affect the '66 Corvette pulley choice, and your AIM would confirm this. BTW, what part # shows there for the base alternator pulley/fan ? UPC 6, sht A2 (if same page as the '65) ? Does it show a separate fan & pulley ?

Does the '66 JG table really show a pulley with 2_15/16" dia ? In the P&A30 catalog there is no such diameter; closest under 3" is 2_53/64, but it has a separate fan. Catalog seems to indicate 2_13/16" # 3843342 for '66 base fan/pulley assy.

[John P.]

Re: C2 Alternator Pulley

The correct pulley is a one piece fan/pulley with the part #3843342AJ stamped on the pulley side.

[Robert T.]

Re: C2 Alternator Pulley

John, Wayne

Thanks for the replys and the pictures. As far as the JM diameter listing goes, I was going by my poor memory, but I knew it was listed as just under 2 and 3/4. It may have been 13/16 like you said. I don't have the manual with me. I only remember that it was just under 2 3/4, so what the guy measured seems feasable. (he measured the 2 3/4.)

John,

When you say that the part number is "on the pulley side" , do you mean the fan side, or what. Sorry I don't understand.

bob

[Robert T.]

Re: C2 Alternator Pulley

Oh, I think I see what you mean John. Looking at Wayne's pictures again I see the number is stamped on the pully side of the fan. Sorry.

bob

[Robert T.]

Re: C2 Alternator Pulley

hello Wayne,

Getting back to you on your questions. Just as you and John said, the part number in the assy man is 3843342. The JG lists that as 2 & 13/16, also as you said.

All the other numbers are correct on the alternator, it appears that there are no numbers on the fan though. Is that indicative of it being for some other application?

Thanks again to both of you guys for taking the time to reply.

bob

[Wayne M.]

Re: C2 Alternator Pulley

hello Wayne,

Getting back to you on your questions. Just as you and John said, the part number in the assy man is 3843342. The JG lists that as 2 & 13/16, also as you said.

All the other numbers are correct on the alternator, it appears that there are no numbers on the fan though. Is that indicative of it being for some other application?

Thanks again to both of you guys for taking the time to reply.

bob

Bob -- here's a suggestion; turn over the p/f assy and look on the back side (alternator side) near the hub . The one I show on the left of the pic has the part # that I show on the tag, stamped into the center hub area, very close to the center hole. Maybe yours is the same.

I'm no '66 expert but for '65, the fan without those multiple radial reinforcing/anti-noise(?) ribs that show on the fan on the right are the norm; also for fans separate from the pulley. IMHO, 1965's divorced fans typically have a single radial rib [per blade] plus the notch where the blade tip bends. Others may have noticed differently .

[Robert T.]

Re: C2 Alternator Pulley

Thanks for the additional info, Wayne. I think I'll buy it.

bob