Replacement Fan

ModAfan said:
“I too would stay with the 2 blade aluminum fan. Be cautious and make sure that the taper is correct. A couple of my fellow club members have experienced in-correct taper on the fan causing it to be loose on the shaft.”
“Buy a new aluminum 2 blade fan from a reputable supplier. Some of the early fans had taper problems, balance problems and/or straightness problems.”
I bought an aluminum fan from one of the purveyors of junk a few months ago, but I haven’t mounted it yet. It is dated 10/17/14. Anyone know if it is one of the wobbly ones?
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10 years ago I was checking a lot of the aluminum fans, and found problems with blade pitch and the blades not being straight. Over the past few years The aluminum fans I've checked have been excellent.:)
 
Hi Guys,
After reading about all the taper issues you brought up. Thank you very much.

I went to a nearby parts store with my water pump and fitted the hub assembly of the new one on the shaft with no woodruff key. He hub fit really tight and felt seated on the shaft with no wobble. I also noticed that there was enough threads to not bottom the nut. I put a on new woodruff key tightened the hub with the nut and cotter pin. Added the blades and we will see what happens. It was very helpful to learn about shaft taper. Since I tried 2 fans supposed to be good that would not stay tight.

Thanks for all your advice and help. I believe I cured my problem, I let you all know how it goes.
Richard
 
I had problems with fitting a new aluminum fan to 3 different waterpump shafts, all new, a couple years ago. One was on a rebuilt waterpump, the others were just replacement shafts. The tapers were different enough that the fan would rock to some extent on each shaft. I eventually went with pumps from James Rupert for both of my A's, the aluminum fan fit to shaft was good. I regularly check to see that it is tight on the tudor when the hood is up, no problems so far. The pickup is still not running, but hopefully I'll be able to yard drive it before the snow flies around here.

I mention this because it should be pointed out somewhere in this thread that you shouldn't assume the taper on your water pump shaft is correct and the fan isn't. There could be a problem with either one, or both.

With repro parts I assume everything is junk and work my way up from there. :-)

-DAN
 
What degree is the original taper? When you know that, recut the taper on the new fan with the correct tapered reamer. Can't be more than a degree or two..

Larry
 
My coupe came with the four blades bolted on. Didn't like the looks so removed one blade. Three years later all is well and have had no problems what so ever:)

Sewall

I do check the bolts every once and awhile.
 
I believe Snyders is the only manufacturer of the aluminum fans. They have been on the market for maybe 15 years?? There were some initial problems with the fans however they have been fixed. I haven't heard or experienced any problems with the fans they have been making for the past ten years. Unless your buying an early "NOS" Snyders fan from a vender who doesn't sell much the fan should have no problems.
 
The only problem with this is that NO ONE has them in stock right now and won't until January 2016. I tried 6-7 different vendors - all the usual suspects - none.
 
I don't understand this, john lavoy ran a test on the fans and found that the two blade fan cooled every bit as good as the plastic 6 blade or the 4 blade in most cases. The advantages of the 6 blade is not relevant. Therefore go with the 2 blade an keep the car looking like an 80+ year old car.
 
We did an investigation on the taper of the shaft and fan hubs. The problem wasn't with the parts it is the fit of the woodruff key. To make sure the key is the correct height put the fan on the shaft without the key. You can now feel if there is any wobble etc. and see how far the fan goes onto the shaft. Mark that spot with a pencil or marker. Remove the fan put the woodruff key on and reinstall the fan. If you don't get back to your mark your problem is with the fit of the key. Once you get that fitted into the slot or indent in the shaft your fan will seat properly and you won't have a wobble on the fan.
 
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