69 4 blade fan orientation in shroud?

[KevinW]

So, I have been running a 6 blade clutch fan in my 69 since I swapped engines (327/210 out, 350/300 HA in).  But it has always run on the hot side. Rebuilt radiator did not fix.  Fan blades were correctly half in/half out in the shroud.

So I decided to try the 4 blade fan, to see if it changes anything.  So this is all factory parts, 69 version fan, and correct 1" 3927792 spacer. 

It surprised me to find the the fan is no longer in the shroud.  It needs 1/2" or 3/4' more spacer to get halfway into the shroud.

Was this the was it was from the factory?

ps, still running hot.

 

[bcmiller]

How long is the spacer you are using now?

I am not sure exactly what is correct, but half in/half out seems to work for most setups.

What is your timing? If too much, it can cause an engine to run hot.

[David K]

Kevin,
Can you define "running hot"? That's a subjective term and leaves a very broad interpretation.  Assuming the radiator is clean, is it a 2 row or 3? 50/50 mix? Correct accessory belts and pulleys? Timing correct?

[GMAD_Van Nuys]

According to CRG, a 1 inch fan spacer was used for the small block V-8 in 1969 with the fixed 4 blade fan, whether the vehicle had a 2 or 3 core radiator:

https://www.camaros.org/coolingsystems.shtml

As there was only one fan shroud for the small block V-8 in 1969, your set-up looks okay to me. 

Besides checking your ignition timing as previously mentioned, your thermostat could possibly not be functioning properly and not restricting the coolant flow enough for the radiator to cool the fluid.