AOD Overheating - fixed

[CA650]

That small fan isn't helping...

my fan is stock size is there a larger one someone recommends?

 

[CA650]

That small fan isn't helping...

your fan size comment caused me to look more closely at fans.
I think my fan is the stock 6 blade belt driven fan and it fits as well as it could into the champion matching g fan shroud so i’m not seeing any room for improvement on belt driven fans.

but since I love all things mechanical and because I can never pass up an excuse to buy some type of tool, im going to go look for a laser engine temp gauge. I think i’ve seen those where you can point at something and get a reading, id like to check various temp spots around the engine and drive train.

still interested to understand more on your comment re: the stock fan and fan belt setup. maybe there is some excuse coming out of this to go with a better looking serpentine setup or swap over to electric.

btw guys - if the stock operating temp of a ford 302 is something like 180 to 190 degrees - remind me again why we are mixing the engine cooling with the transmission cooling for any reason? seems like a recipe to get a 190 degree transmission temp best case which is not what we want.

 

[gr8scott]

I think my fan is the stock 6 blade belt driven fan and it fits as well as it could into the champion matching g fan shroud so i’m not seeing any room for improvement on belt driven fans.

still interested to understand more on your comment

What you have there is not a stock fan. This is a stock fan. I run this one which closely resembles it. They work fine with the stock shroud and can also be had in 17" for better shroud clearance.
Didn't mean to cause a ruckus, just saying there is room for improvement as far as your fan is concerned. I run the 18" myself.

Not sure about the AOD, but 180-190 is not a bad temp for a C4.

 

[CA650]

What you have there is not a stock fan. This is a stock fan. I run this one which closely resembles it. They work fine with the stock shroud and can also be had in 17" for better shroud clearance.
Didn't mean to cause a ruckus, just saying there is room for improvement as far as your fan is concerned. I run the 18" myself.

Not sure about the AOD, but 180-190 is not a bad temp for a C4.

Hey no ruckus at all! very interested in whatever information anyone has. I'm in a hurry to know what i have here because i'm going to take the front end off anyway to work on the timing chain seal so if i want to replace the fan now is a good time to do it. I'll take some closer pictures of it today.

One thing is certain is that i would not recognize a stock fan vs any other kind of fan. I can only go by what is on the truck which i assumed was stock.

if this fan (picture attached) isn’t right that would explain a lot. Note its 6 bladed and I guess the stock fan is 7 bladed.
Anyway ordered a new fan and a spacer thanks much.


I am now preparing myself for whatever else i might find under that timing chain cover when i get around to opening i up.
BTW fixed the blinkers - seems like the blinking module burned out when i was replacing the front grill, maybe i shorted it. anway a new one was $6 fixed.

 

[CA650]

fan too small

Here are some photos of the “stock” fan thank Gr8scott to you for pointing out a potential issue for me.

We opened the patient up last night going in to try and change the timing belt cover gaskets and see what else is in there.

the fan I said was “stock” is some kind of thin ninja star design not at all similar to stock, so now maybe when i’m done I will “possibly” route the transmission cooler through the radiator in addition to the external dedicated transmission radiator. I bought a FLIR IR thermometer and i’ll shoot the temp of every thing once it’s all running again and decide then.

 

[Slowleak]

I did some tests of various fans a few years ago with a anemometer and posted the results. The 7 blade flex fan is by far the best when shrouded properly, but it can be a tight fit sometimes. Especially if you have A/C or a thick radiator... That fan you are replacing was the worst performer of the ones I tested.

 

[DirtDonk]

Yep, well known since the '70's basically as a poor performer in the cooling department. But they were relatively inexpensive, light weight, were thought to draw slightly less power than a factory fan (except when compared to a clutch fan), had a nice flat profile to help fit lots of tight spaces, and with all their bright colors they looked cool in open-bay hot-rods and such.
Even while hot-rods spent a lot of time overheating and wasting a lot of time trying to cool them down, they still remained popular.

And they were in fact pretty cool looking. Tempting in all their Ninja glory and available colors to match the custom paint schemes. Lots of bright candy colors at one point, or just paint your own to match.

Maybe your PO had a fan failure and needed one quick, or maybe fitting in there was not easy with a big stock one, or heard these were the bomb from the old hot-rodders, or maybe they didn't know the stock ones were still available. Or it was done so long ago that factory ones were not as easy to find.

In street machines where air flow over the radiator was a little more efficient when the vehicle was moving, maybe they were not as big a detriment to cooling. Just don't sit there idling for long periods and you might be ok in those situations.
But very few truck owners used them, or if they did it wasn't for long. Especially back when these vehicles spent any time off road slogging along on a hot day over a hard trail.

Paul

 

[CA650]

thanks paul very funny
well we will see when it goes back together if it all fits

i’m gojng to start a timing chain thread and see if I can get some suggestions as I just hit my first snag