Does anyone know what fan came on my 66 327cu 350hp? It has a diss-proportioned 5 bladed NON clutch presently. It has power steering ,if that makes a differance. Thanks in advance...
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Re: Factory fan 1966 L79
it should have a 5 blade 17 1/8 with a fan clutch -
Re: Factory fan 1966 L79
It should be called out in your copy of the AIM book as GM 3770529, a 5-blade fan that was used on all non-A/C cars in that era. There are two versions of the Corvette 3770529 and the difference lies in the style of rivet used to affix the blades to the spider (rounded/tall for early cars vs. flat/button style for later cars). Your copy of the Judging Guide will advise you on what judges look for in terms of originality for your car...Comment
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Re: Factory fan 1966 L79
Thanks to Jack and Keith for their info. Found you can still buy a GM # 3770529 at Genuine for a good price. Thanks again!Comment
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Re: Factory fan 1966 L79
Jim,
If this any help, here are 2 photos of my 67 L-79 fan.
Rick
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Re: Factory fan 1966 L79
Jim - Yes, the fan is still available but there are some differences to look for from the judging perspective. My experience is that the new SERVICE fan blade assembly does not have the "W" as you can see on Rick/s photos and many of the new Service fan blade assemblies have a balancing weight on one of the blades and I don't remember seeing any of the "older" original fan blade assemblies having a balancing weight. PeteComment
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Factory fan 1966 L79; watch out for "FRONT" stamping
Jim,
Also be aware that some currently sold new fans will have the word FRONT stamped into the hub area, in very large letters. As far as I know original fans have an H stamped into one side of the hub area and, as Pete says, a W stamped toward the base of one of the blades on the other side. But no FRONT stamp.
GaryComment
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Re: Factory fan 1966 L79
I arrived in florida today,burr. If anyone has a correct fan and clutch for my car, maybe we could get together at the Kissime meet in a couple weeks.Comment
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Re: Factory fan 1966 L79
Jim,
Here is a picture of the fan and a close up of the front blade off my 66 350 with A/C
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It does have the weights on it and it says , in case you can not read the picture , on the front of each blade :
C 6
912239
S C
There is no W or H stamp anywhere. I don't know if the differences are due to it being a 66 as opposed to Ricks 67 , or if it is because it has A/C .
But here it is for your perusal.
JimComment
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Fan 1966 L79 with balance weights
Jim,
With no W or H stamped and with the balance weights added, I would assume it's a service replacement part.
GaryComment
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Re: Factory fan 1966 L79
Jim,
Your 5-blade 18" dia. fan is GM # 3863137 made by the Schwitzer Company (Schwitzer part # 912239) and date coded March 1966. The other 5-blade 18" dia. fan used on 1966 & 1967 Corvettes w/AC was GM 3778562 made by the Hayes-Albion Company (stamped "H", "FRONT", and "W" on the back side) with 4 flat rivets/blade not to be confused with the 5-blade 18" dia. fan stamped "H" and "FRONT" with 5 domed rivets/blade used on 1958-1963 Chev. V8 w/AC, 1961 Chev. 348, and 1961-1963 Chev. 409 (GM # 3749576).
My original 1966 Corvette 5-blade 17 1/8" dia. fan (GM # 3770529) is stamped "H" (for Hayes-Albion) from on the front side and "W" on the back side on one of the arms.
Some Hayes-Albion fans are stamped "H" and "FRONT" and a 2-digit number (the middle 2 digits of the 6-digit Hayes-Albion part number).
The 1966-1967 Corvette w/427 came with a 5-blade Hayes-Albion fan with "H", "FRONT", and "66" stamped on the front (GM # 3888366).
The "66" is NOT the last 2 digits of the GM part number. The "66" is the middle 2 digits of the Hayes-Albion part number.
Another example: One of the four different 7-blade 18" dia. fans used on the 1969 Z28 (GM # 3956684) is stamped "H", "FRONT", and "94". The Hayes-Albion part number is 159432.
I have studied 1960's and 1970's Chev. fans for the last 20-25 years and had as many as 50 fans in my "collection". I have sold many of my fans in recent years.Comment
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Re: Factory fan for 1966 C60 equipped sb Corvettes
Jim - Looks like an excellent example of the "optional" fan blade assembly for a C60 equipped 1966 sb Corvette as Dave has described. Also, check your 1966 NCRS TIM&JG and you should find the description of the 2 fan blade assemblies that were used on C60 equipped 1966 sb Corvettes and I think you will see that the example of the stamped information on the blades is in fact exactly what's on your fan blade assembly. In addition, check C60 section of the 1966 Corvette AIM and you will see the 2 fan blade assemblies listed for the sb Corvettes.
These fan blade assemblies were also used on C60 equipped 1967 sb Corvettes.
PeteComment
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