I have two fan blades, but I can not figure out which one is my original and which one was given to me years ago?

One fan has the outer edge of each blade squared off, and the other fan has the outer edge of the blade rounded off.

Both fans are 19.5" in diameter.

Both fans have the word "front" stamped and a circle with a "5" in the middle stamped on the fan assembly's center section.

No part numbers stamped on the front or back side of either fan assemblies.

Is one a Chevy and the other an Oldsmobile fan blade?

BTW, the car in question is a '70 442 w/ A/C & HD cooling.


Front side
IMG_1038.jpg
IMG_1040.jpg
IMG_1039.jpg

and.... the back side
IMG_1043.jpg
IMG_1045.jpg
IMG_1044.jpg

 

I say the black fan is the correct one. It looks like my Pontiac fan with the rounded edge

 

I'm not staring at my car right now, but I'm 99% sure that its fan, which I believe to be original, looks like the black one you have pictured. My car is a '70 442 with A/C.

 

Im going with the black one.

 

The clutch fans on my '68 4-4-2 with HD cooling and '69 4-4-2 with A/C both appear identical to your black fan.

Randy C.

 

Black one it is then, thanks guys!!!

 

Make sure it clears the shroud if you have one. 19.5" is pretty big; Iirc the 66s used no bigger than 19" for example.

 

Yo Rocket.....it's the black one. Not sure what the other fan is off of. Big block Chevys almost always used a 7 blade fan with the curved edge. So the straight edge fan is a mystery.

regards,
bob

 

The answer to the question "Which of the two fans pictured is correct for a 1970 442?" is NEITHER.

See my post of 7-Feb-2011 at: https://classicoldsmobile.com/forums...fan-blade.html