1965 7-Blade A/C Fan Identification

**Peter L.** · February 17, 2007, 05:27 PM

Re: 1965 7-Blade A/C Fan Identification

James - I've seen a number of 64-65 Corvettes with C60 and so far none have had the configuration of the 7-blade fan on eBay. In discussions and observations the "original" 64-65 C60 7-blade Corvette fan had the "unique" fan blade end configuration with the angled cut and flat top tip that you describe with a bend in the blade near the tip and as show in Noland Adams' 63-67 book, page 218 as p/n 3853943.

An interesting note is that from my experiencce and that of others there were 2 versions of the 3853943 fan blade assembly with the difference as best I could tell being the shape of the head of the rivets. One had the flat button rivets and the other version had the round mushroom head rivets.

I have one with the flat button head rivers and it has a H and a 6 or 9 stamped on front face of the center portion of the support and a W stamped on the back of one of the triangular support sections that attach to the blade.

Also, note that the Chevrolet Parts and Accessory Catalog does list the 7-blade, p/n 3853943, for 1964-1966 sb Corvette w/ C60, but Noland's book indicates 64-65 and that is consistant with my experience and the judging manuals. The 66 judging manual indicates that "There are undocumented cases of 7 blade fans used on air-conditioned cars."

Hope this helps. Pete

**Wayne M.** · February 17, 2007, 05:34 PM

eBay fan is wrong for '65 A/C

7-blade fan below is what is correct for 1965 (and probably '64; can't say for 1966). This one has mushroom heads on the rivets (per '65 TIM&JG, but I understand later cars may have flat heads). There are no stampings on rear side of the hub or blades. Can't remember if anything on the front (not going to take it off to see).

A few things about the eBay fan. Wrong blade tip contour; should not be an indented area on the front of the blade where the rivet heads are. The part #'s quoted in the Tech Manual can be used for X-reference to the dwgs in Noland's Vol 2. No numbers on blades.

Probably more features that others can describe. Sounds like yours is like mine, below.

Attached Files

65C60L76Custom.jpg (84.4 KB, 13 views)

**Grant W.** · February 17, 2007, 06:42 PM

Re: 1965 7-Blade A/C Fan Identification

The fan on ebay 7 blade is for an Impala 409 or something like that. Not a corvette fan at all. I do have the same fan and I can make it a corvette fan for you. LOL. Grant

**Michael M.** · February 17, 2007, 10:27 PM

Re: eBay fan is wrong for '65 A/C

Hi Wayne, You don`t happen to know your upper pulley no. and if it was original do you? Interested in all 65 C-60s for reasearch. Thanks, Mike

**James W.** · February 18, 2007, 01:52 PM

Re: That's Exactly What I have on My Car!!! *NM*

**Peter L.** · February 18, 2007, 03:13 PM

Re: That's Exactly What I have on My Car!!!

James - The sequence of responses is such that I'm not sure as to which fan blade assembly is on your '65 w/ AC. Is it the fan blade assembly Wayne had a picture of or the eBay fan? Inquiring minds want to know. Pete

**Wayne M.** · February 18, 2007, 03:18 PM

Upper Pulley # 3848904 on my L76 - C60 ...

... an early car 014xx. But Mike, this doesn't agree with the AIM (UPC C60, Sheet 2) which calls for 3850979. This latter number does not appear in my parts catalog P&A30 Rev July 1965, but the W.P. pulley for the non-L76 # 33850680 does show in this service, and the "904" also shows for L65 w/C60.

I've had my car for 25+ years and I don't think any of the previous owners would have changed it. The part # is stamped on the pulley. Strange thing is that the pulley had orange paint under the black pulley paint.

Let me know if there's anything else you'd like to know on this car.

**Michael M.** · February 18, 2007, 03:23 PM

Re: That's Exactly What I have on My Car!!!

James, I have your number recorded but when Wayne mentioned he had the same setup I had to ask what his was also. I would like to find out the car serial number that GM changed to the 0419 pulley if possible. Thanks, Mike

**Michael M.** · February 18, 2007, 11:23 PM

Re: That's Exactly What I have on My Car!!!

James and Wayne, Both of you have the 3848904 water pump pulley on your C-60 cars. {of course you both knew that] which also agrees with Joe Lucias research on this also. I think this is good enough proof that this is an original correct number.Joe states that this pulley was discountied many years ago and was replaced by GM#3995641 which is still available from GM. I have this pulley. I will try this on my engine even though I still don`t think I have the correct bottom pulley setup to match. The power steering pump pulley appears to have to be the GM #3770509 stamped pulley. The add-on power steering pulley is the GM #3751232 I think which I have. Thanks to all for the info so far. I need to confirm the lower balancer pulley for sure and I think we will have it nailed down. Those of you with original cars don`t know how lucky you are. I don`t think a lot of his is going to agree with the AIM. If it does I just don`t have enough sense to read it correcly. Mike

**James W.** · February 19, 2007, 09:28 AM

Re: That's Exactly What I have on My Car!!!

Pete,

I have the same fan that Wayne has pictured in his post, EXCEPT my fan has the flat rivets, my car is a late build car VIN 22095. I'm glad to find out that for the most part I have the correct fan, other than the Judging Guide says that it should have the 3853943 part number stamped into it. Would you say that the '65 Judging Guide is in error or just need some clarrification regarding later built cars? This car has been in my family since 1974, and the only thing that has been done to it buy us is a repaint in 1978 and engine overhaul in 1980, the car currently shows 67,623 miles on the odometer and the odo has worked the entire 30 plus years we've owned it. I would not think that the fan was changed, at least not a long as we have owned the car. I have found that the fan clutch was replaced with a correct bi-metallic type clutch with the following info and date code C5 AE-A 2 8 67 SC and the radiator was replaced with a correct Harrison service replacment radiator dated 65J, again before we owned the car. When I stripped the original Glen Green paint there was no evidence of front end damage, so I know the the radiator fan clutch repalcement was not done because of an accident.

Regards,

James West
Omaha, NE.

**Wayne M.** · February 19, 2007, 12:50 PM

My reading of the '65 TIM&JG (5th ed.) ...

is that they do provide the part #s for all 3 designs of 1965 MY fans (non-air, C60, and 396) but dont specify in so many words that these numbers are to be found on the blade assy's. This is strange; why would the numbers be quoted if not to visually verify the part by number on the judging field ? I guess this is just the "tech information" part of TIM&JG.

I also have a mid-64 non-C60 fan (#3770529) & clutch and just checked and all I see is the letter "H" stamped into the center hub on the forward face.

**Michael M.** · February 19, 2007, 10:52 PM

Sorry for Hi-Jacking part of your Fan info Request

I didn`t mean to butt in but couldn`t help myself. I`ll try to do better. Mike

1965 7-Blade A/C Fan Identification

1965 7-Blade A/C Fan Identification

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