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Old 06-02-2014, 12:23 PM   #1
aotte1
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What Year is This 5 Blade Fan?

Trying to ID what year(s) this 5 blade fan is correct for, tried to match it to search pictures with no luck. Thank for the help.

Les
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Last edited by aotte1; 06-02-2014 at 12:24 PM. Reason: Add picture
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Old 06-02-2014, 02:09 PM   #2
aotte1
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Re: What Year is This 5 Blade Fan?

Just FYI, to add a little to maybe help others, the following is a four blade fan found on both 1965 and 1966 "292" 6 cylinder engines. The 1965 was on a low mileage one ton military ambulance, the 1966 is from a C10 pickup, both appeared to very original.
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Old 06-02-2014, 02:11 PM   #3
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Re: What Year is This 5 Blade Fan?

Other side of 65, 66 fan. Still need info on first fan picture year/ engine if applicable.
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Old 06-02-2014, 02:13 PM   #4
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Re: What Year is This 5 Blade Fan?

Close up of fan spacer.
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Old 06-02-2014, 02:17 PM   #5
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Re: What Year is This 5 Blade Fan?

Picture of both spacer and shim?
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Old 06-02-2014, 02:20 PM   #6
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Re: What Year is This 5 Blade Fan?

Yes, I sometimes use the ceiling for extra space in garage

Les
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Old 06-02-2014, 03:31 PM   #7
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Re: What Year is This 5 Blade Fan?

Most all GM fans will have a part number stamped into it somewhere on the part, and it'll almost always start with the number "3". Find the part number and type it into Google and see what comes back. You may get lucky and it'll pinpoint the year and application.

What part of Louisville are you from? I was born and raised in the South End, around Iroquois Park. My brothers are still there, and they live in Okolona, near Moore High School.
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Old 06-02-2014, 03:47 PM   #8
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Re: What Year is This 5 Blade Fan?

That is the same fan that is on on my 65 283 with the fan shroud and air.
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Old 06-02-2014, 05:27 PM   #9
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Re: What Year is This 5 Blade Fan?

Earlier Chevrolets use a smaller bolt pattern on the blade mount, not sure what year they changed but I know in the early 70s they used the blade you have pictured.
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Old 06-02-2014, 06:11 PM   #10
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Re: What Year is This 5 Blade Fan?

Is there a big "U" shape stamped in each blade around the outside of the rivets ? I don't recognize that blade at all. 292s with heavy duty cooling or V8s with AIR have a 5 blade fan similar to yours but are all 5 rivet per blade fans. The only marking on the fan is a "W" . No part number. The GM Part numbers for these blades are 3770262 or 3789562. Below is a flat rivet style and an earlier round rivet style.



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Old 06-02-2014, 08:39 PM   #11
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Re: What Year is This 5 Blade Fan?

Ok, I just looked and mine has 5 rivets also.
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Old 06-02-2014, 09:12 PM   #12
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Re: What Year is This 5 Blade Fan?

Mine has the round rivet style..
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Old 06-02-2014, 10:50 PM   #13
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Re: What Year is This 5 Blade Fan?

60 - 66,

Yes, there is a u in the blade, will look for the "W" stamp.
Thanks for the help,



Les

Last edited by aotte1; 06-02-2014 at 10:54 PM. Reason: Add discussion
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Old 06-02-2014, 11:01 PM   #14
aotte1
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Re: What Year is This 5 Blade Fan?

63 Burban,

In My search of pictures, did find 70-72 image of fan with similar rivet pattern, not sure if original to that truck, could not see blades in that picture.

Thanks,
Les
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Old 06-02-2014, 11:07 PM   #15
aotte1
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Re: What Year is This 5 Blade Fan?

Chevyrestoguy,

We live south of Louisville toward Fort Knox , a little bit off of I 65.
Will examine fan to look for any markings.

Thanks,
Les
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Old 06-03-2014, 09:51 AM   #16
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Re: What Year is This 5 Blade Fan?

I think some of the trucks built for northern climates had 3-blade fans too.
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